Search Results

Get accurate and up-to-date weather forecasts for Luang Prabang, Laos. Check current conditions, daily and weekly predictions, and historical data. Upcoming weather in Luang Prabang Vientiane's Air Quality & Pollen Luang Prabang's weather Overview Luang Prabang Weather: A Tropical Paradise Discover the perfect time to visit Luang Prabang based on its weather. Luang Prabang,a UNESCO World Heritage Site, boasts a tropical monsoon climate. This means you can expect warm temperatures and plenty of sunshine throughout the year. However, there are distinct seasons that influence the best time to visit. Dry Season (November to April): Pleasant weather: Enjoy comfortable temperatures and minimal rainfall. Ideal for exploring: Perfect for sightseeing, hiking, and outdoor activities. Peak tourist season: Expect higher prices and crowds. Rainy Season (May to October): Heavy rainfall: Experience frequent showers and occasional thunderstorms. Lush landscapes: Enjoy the vibrant greenery and waterfalls. Fewer crowds: Benefit from lower prices and a more peaceful atmosphere. Best time to visit: The dry season (November to April) is generally considered the best time to visit Luang Prabang due to its pleasant weather and ideal conditions for exploring. However, the rainy season offers a more affordable and less crowded experience, making it a great choice for budget travelers or those who prefer a quieter atmosphere. Remember: Pack lightweight, breathable clothing for the warm temperatures. Bring a raincoat and umbrella during the rainy season.Check the weather forecast before your trip for the most up-to-date information. Experience the beauty of Luang Prabang, no matter the season! Weather in Laos Stay informed and plan your day with our comprehensive weather forecast in Laos. Get accurate and up-to-date weather information, including temperature, humidity, precipitation, and more. Whether you're exploring the country's stunning landscapes or planning outdoor activities, our website provides the essential weather data you need. Vientiane forecast Luang Prabang forecast Pakse forecast Vang Vieng forecast Champassak forecast

Discover the weather in Phou Khao Khouay, Laos. Find detailed forecasts, including temperature, humidity, air quality, precipitation, and more. Stay informed about the climate and plan your activities accordingly. Upcoming weather in Phou Khao Khouay Phou Khao Khouay 's Air Quality Phou Khao Khouay 's weather Overview Phou Khao Khouay: A Mountaintop Escape Phou Khao Khouay, a stunning mountain peak in Laos, offers breathtaking views and a cooler climate than the lowlands. Here's a breakdown of the weather you can expect: Best Time to Visit: The ideal time to visit Phou Khao Khouay is during the cool, dry season from November to February. During these months, the weather is pleasant, with clear skies and comfortable temperatures. Wet Season (May to October): Heavy Rainfall: Expect heavy rainfal l and potential thunderstorms. Lush Greenery: The mountain is lush and green during this time. Foggy Conditions: The peak may be shrouded in fog, affecting visibility. Tips for Visiting: Pack Warm: Even during the dry season, nights can be chilly, especially at higher altitudes. Wear Comfortable Hiking Boots: The terrain can be challenging, so sturdy footwear is essential. Bring Rain Gear: Be prepared for sudden rain showers, especially during the wet season. Respect the Environment: Avoid littering and adhere to local guidelines to protect the natural beauty of the mountain. By understanding the weather patterns, you can plan your trip to Phou Khao Khouay and make the most of your experience. Weather in Laos Stay informed and plan your day with our comprehensive weather forecast in Laos. Get accurate and up-to-date weather information, including temperature, humidity, precipitation, and more. Whether you're exploring the country's stunning landscapes or planning outdoor activities, our website provides the essential weather data you need. Vientiane forecast Luang Prabang forecast Pakse forecast Vang Vieng forecast Champassak forecast

Get accurate and up-to-date weather forecasts for Don Det island, Laos. Check current conditions, air quality, hourly predictions, and long-range outlooks. Plan your trip or daily activities with confidence. Upcoming weather at Don Det Island Don Det Islands' Air Quality & Pollen Don Det Islands' weather Overview Weather at Don Det Islands The Don Det Islands (Si Phan Don) region in southern Laos offers a tropical climate with distinct wet and dry seasons. Wet Season (May-October): Expect heavy rainfall and higher humidity during this period. While the temperatures remain warm, the frequent showers can sometimes disrupt outdoor plans. Dry Season (November-April): Enjoy pleasant weather with average temperatures ranging from 16°C (61°F) to 21°C (70°F). This is the ideal time to visit for comfortable sightseeing and outdoor activities. While the wet season can bring rain, it also offers lush greenery and a quieter atmosphere. If you don't mind occasional showers, you may find the 4000 Islands particularly enchanting during this time. Overall, the 4000 Islands enjoy pleasant weather year-round, making it a popular destination for travelers seeking a tropical paradise. Weather in Laos Stay informed and plan your day with our comprehensive weather forecast in Laos. Get accurate and up-to-date weather information, including temperature, humidity, precipitation, and more. Whether you're exploring the country's stunning landscapes or planning outdoor activities, our website provides the essential weather data you need. Vientiane forecast Luang Prabang forecast Pakse forecast Vang Vieng forecast Champassak forecast

Get accurate and up-to-date weather forecasts for Sekong, Laos. Check current conditions, daily and weekly predictions, and historical data. Upcoming weather in Sekong Sekong's Air Quality & Pollen Sekong's weather Overview Sekong Weather: Your Guide to Seasonal Changes Sekong, nestled in the heart of Laos, experiences a tropical monsoon climate characterized by distinct wet and dry seasons. Understanding these seasonal variations is crucial for planning your visit and making the most of your time in this beautiful region. Seasons: Wet Season (May to October) : Rainfall: Expect heavy rainfall during this period, often leading to lush greenery and occasional flooding. Temperatures: While it can be hot and humid, the rain helps to keep temperatures relatively comfortable. Activities: Despite the rain, many outdoor activities are still possible, such as trekking, exploring waterfalls, and visiting local markets. Dry Season (November to April) : Rainfall: Minimal rainfall, making it an ideal time for outdoor activities. Temperatures: Temperatures can vary, with cooler mornings and evenings, especially during the winter months (December to February). Days can be warm and sunny. Activities: This is a great time for hiking, biking, and exploring the region's stunning landscapes. Tips for Travelers: Packing: Pack lightweight, breathable clothing for the hot and humid weather, as well as rain gear for the wet season. Stay Hydrated: Drink plenty of water to stay hydrated, especially during the hot and dry season. Sun Protection: Protect yourself from the sun by wearing sunscreen, a hat, and sunglasses. Monitor Weather Updates: Stay informed about the latest weather forecasts and advisories, especially during the rainy season and typhoon season. By understanding the seasonal patterns in Sekong, you can plan your trip accordingly and make the most of your time in this enchanting region. Weather in Laos Stay informed and plan your day with our comprehensive weather forecast in Laos. Get accurate and up-to-date weather information, including temperature, humidity, precipitation, and more. Whether you're exploring the country's stunning landscapes or planning outdoor activities, our website provides the essential weather data you need. Vientiane forecast Luang Prabang forecast Pakse forecast Vang Vieng forecast Champassak forecast

Get accurate and up-to-date weather forecasts for Sayaboury, Laos. Check current conditions, daily and weekly predictions, and historical data. Upcoming weather in Sayaboury Sayaboury's Air Quality & Pollen Sayaboury's weather Overview Sayaboury Weather: A Tropical atosphere Discover the perfect time to visit Sayaboury based on its weather. This means you can expect warm temperatures and plenty of sunshine throughout the year. However, there are distinct seasons that influence the best time to visit. Dry Season (November to April): Pleasant weather: Enjoy comfortable temperatures and minimal rainfall. Ideal for exploring: Perfect for sightseeing, hiking, and outdoor activities. Peak tourist season: Expect higher prices and crowds. Rainy Season (May to October): Heavy rainfall: Experience frequent showers and occasional thunderstorms. Lush landscapes: Enjoy the vibrant greenery and waterfalls. Fewer crowds: Benefit from lower prices and a more peaceful atmosphere. Best time to visit: The dry season (November to April) is generally considered the best time to visit Sayaboury due to its pleasant weather and ideal conditions for exploring. However, the rainy season offers a more affordable and less crowded experience, making it a great choice for budget travelers or those who prefer a quieter atmosphere. Remember: Pack lightweight, breathable clothing for the warm temperatures. Bring a raincoat and umbrella during the rainy season.Check the weather forecast before your trip for the most up-to-date information. Experience the beauty of Sayaboury, no matter the season! Weather in Laos Stay informed and plan your day with our comprehensive weather forecast in Laos. Get accurate and up-to-date weather information, including temperature, humidity, precipitation, and more. Whether you're exploring the country's stunning landscapes or planning outdoor activities, our website provides the essential weather data you need. Vientiane forecast Luang Prabang forecast Pakse forecast Vang Vieng forecast Champassak forecast

Get accurate and up-to-date weather forecasts for Salavan, Laos. Check current conditions, air quality, hourly predictions, and long-range outlooks. Plan your trip or daily activities with confidence. Upcoming weather in Salavan Salavan's Air Quality & Pollen Salavan's weather Overview Salavan's Weather: A Tropical Climate Salavan Province in southern Laos experiences a tropical monsoon climate, characterized by distinct wet and dry seasons. Wet Season (May-October): Heavy Rainfall: The wet season brings heavy rainfall, which can lead to flooding in some areas. Lush Greenery: The abundant rainfall transforms the landscape, making it lush and green. Temperatures: Temperatures remain warm, but the high humidity can make it feel hotter. Dry Season (November-April): Pleasant Weather: This period offers pleasant weather with warm temperatures and low humidity. Ideal for Outdoor Activities: It's a great time for exploring the province's natural beauty, hiking, and visiting historical sites. Temperatures: Average temperatures range from 20°C to 30°C (68°F to 86°F). Pack Accordingly: Bring lightweight, breathable clothing, especially during the wet season. Stay Hydrated: Drink plenty of water, especially during the dry season. Check the Forecast: Stay updated on the latest weather conditions, especially during the rainy season. Embrace the Local Culture: Experience the local lifestyle and traditions, which are deeply intertwined with the natural environment. By understanding the local climate, you can plan your trip to Salavan and make the most of your visit. Weather in Laos Stay informed and plan your day with our comprehensive weather forecast in Laos. Get accurate and up-to-date weather information, including temperature, humidity, precipitation, and more. Whether you're exploring the country's stunning landscapes or planning outdoor activities, our website provides the essential weather data you need. Vientiane forecast Luang Prabang forecast Pakse forecast Vang Vieng forecast Champassak forecast

Discover the diverse climate of Laos! Explore regional variations, from the tropical lowlands to the mountainous highlands. Get essential information on the best time to visit, average temperatures, rainfall patterns, and more. Laos Climate Guide: Regional Variations Laos, a landlocked Southeast Asian country, experiences a tropical monsoon climate characterized by distinct wet and dry seasons . However, the specific weather patterns can vary significantly across different regions due to geographical factors such as elevation, proximity to the Mekong River, and the influence of mountain ranges. Northern Laos Climate: Northern Laos, including Luang Prabang and the surrounding areas, experiences a cooler climate compared to the south. Winters can be chilly, especially at higher elevations. Wet Season: The wet season in the north typically runs from May to October, with heavy rainfall and occasional thunderstorms. Dry Season: The dry season, from November to April, is characterized by pleasant temperatures and clear skies. Central Laos Climate: Central Laos, encompassing Vientiane and the plains along the Mekong River, has a hot and humid climate. Wet Season: The wet season in central Laos is similar to the north, with heavy rainfall from May to October. Dry Season: The dry season is generally hot and dry, with occasional cool spells. Southern Laos Climate: Southern Laos, including the Bolaven Plateau and the Mekong Delta, experiences a hotter and more humid climate compared to the north and central regions. Wet Season: The wet season in the south is longer and can extend into November. Dry Season: The dry season is relatively short and can be quite hot and dry. Mountain Regions Climate: The mountainous regions of Laos, such as the Annamite Range, experience a cooler climate with lower temperatures and higher rainfall. Wet Season: The wet season in mountainous areas can be longer and more intense due to the influence of the mountains on rainfall patterns. Dry Season: The dry season in the mountains is generally cooler and less humid compared to the lowlands. Key Points to Remember: Elevation: Higher elevations in Laos tend to have cooler temperatures and higher rainfall. Proximity to the Mekong River: Regions closer to the Mekong River can experience more humidity and occasional flooding during the wet season. Mountain Ranges: Mountain ranges can act as barriers to rainfall, affecting precipitation patterns in adjacent regions. Understanding these regional variations in Laos' climate can help you plan your trip and choose activities that are suitable for the specific region you intend to visit. Key information Wet Season (May to October) Heavy rainfall: The wet season is marked by frequent and heavy rainfall, often accompanied by thunderstorms. High humidity:The air is extremely humid, making it feel hotter than the actual temperature. Flooding: In some regions, excessive rainfall can lead to flooding. Dry Season (November to April) Cooler temperatures: The dry season is generally cooler than the wet season, with temperatures dropping slightly. Less rainfall: Rainfall is significantly reduced during this period, but occasional showers may occur. Pleasant weather: The dry season is considered the most pleasant time to visit Laos, with comfortable temperatures and fewer crowds. Average Temperatures Highs: Average high temperatures range from 25°C (77°F) to 35°C (95°F) throughout the year. Lows: Average low temperatures range from 15°C (59°F) to 25°C (77°F). Best Time to Visit Laos: The dry season (November to April) is generally considered the best time to visit Laos due to favorable weather conditions and fewer crowds. However, the wet season also offers its own unique charm, with lush greenery and fewer tourists. By understanding the weather patterns in Laos, you can plan your trip accordingly and make the most of your experience in this beautiful country. Vientiane forecast Luang Prabang forecast Pakse forecast Vang Vieng forecast Champassak forecast

Planning a trip to Savannakhet? Stay informed with our comprehensive weather forecasts. Find out the best time to visit based on temperature, air quality, pollen, rainfall, and more. Upcoming weather in Savannakhet Savannakhet's Air Quality & Pollen Savannakhet's weather Overview Savannakhet Weather: Your Guide to Seasonal Climate Savannakhet, a charming city in southern Laos, experiences a tropical savanna climate, characterized by distinct wet and dry seasons. Understanding this seasonal variation is crucial for planning your visit. Dry Season (November to April): Pleasant Weather: This period offers comfortable temperatures, making it ideal for exploring the city's historical sites and natural attractions. Clear Skies : Expect mostly sunny days with minimal rainfall. Perfect for Outdoor Activities: Engage in various outdoor activities like hiking, cycling, and visiting local markets. Wet Season (May to October): Monsoon Rains: The wet season brings significant rainfall, often in the form of short, intense showers. Lush Greenery: The landscape transforms into a vibrant green, with lush vegetation. Unique Experiences: Embrace the monsoon magic by experiencing the city's unique cultural festivals and traditions. Tips for Packing: Dry Season: Pack lightweight, breathable clothing. A light jacket may be useful for evenings, especially during the cooler months. Wet Season: Bring a raincoat or umbrella, and comfortable, waterproof footwear. Enjoy Your Stay in Savannakhet! Weather in Laos Stay informed and plan your day with our comprehensive weather forecast in Laos. Get accurate and up-to-date weather information, including temperature, humidity, precipitation, and more. Whether you're exploring the country's stunning landscapes or planning outdoor activities, our website provides the essential weather data you need. Vientiane forecast Luang Prabang forecast Pakse forecast Vang Vieng forecast Champassak forecast

Have questions about Laos's weather? Find answers to your most frequently asked questions about rainy seasons, temperatures, Air quality and more. Get weather insights for your trip planning. What is the best period to visit Laos? The best time to visit Laos is generally between November and January. This is the dry season, offering pleasant weather with comfortable temperatures and minimal rainfall. It's ideal for exploring the country's stunning landscapes, engaging in outdoor activities, and enjoying the vibrant culture. What is the seasonality of Laos? Laos has two main seasons: Dry Season: This season runs from November to April, and it's characterized by cool temperatures, minimal rainfall, and clear skies. This is the most popular time to visit Laos as it's ideal for exploring the country's many attractions. Wet Season: The wet season lasts from May to October, and it's marked by heavy rainfall, high humidity, and warm temperatures. While the rainy season may not be ideal for some travelers, it offers a unique experience as the country's landscapes become lush and green. It's important to note that the weather can vary slightly depending on the region, but these are the general patterns. When not to go to Laos? When to Avoid Laos: A Guide to Seasonal Considerations While Laos offers a unique and enchanting experience year-round, there are specific times when certain factors might influence your decision to visit. Here's a breakdown: Rainy Season (May to October) Heavy Rainfall: Expect frequent and sometimes heavy rainfall, which can disrupt travel plans, especially in rural areas. Landslides and Flooding: Mountainous regions may experience landslides, and river basins can be prone to flooding. Limited Outdoor Activities: Some outdoor activities, like trekking or river cruising, might be less enjoyable or even unsafe due to the weather. If you're comfortable with potential disruptions and enjoy the lush greenery and waterfalls that the rainy season brings, it can be a rewarding time to visit. Hot Season (March to April) High Temperatures: Laos can get very hot and humid during these months, especially in the southern regions. Potential Drought: In some years, the dry season can extend into April, leading to lower water levels in rivers and waterfalls. If you're not heat-tolerant, consider visiting during the cooler months of November to February. Does Laos have four seasons? No, Laos doesn't have four seasons. While it does experience changes in weather throughout the year, these changes are primarily divided into two distinct seasons: Dry Season: This season runs from November to April, characterized by cooler temperatures and minimal rainfall. Rainy Season: This season spans from May to October, featuring higher temperatures and significant rainfall. So, while there are temperature variations within these seasons, Laos doesn't experience the same distinct seasons as regions with a temperate climate. Does Laos have a winter? No, Laos doesn't have a winter in the traditional sense. While it doesn't experience snow or freezing temperatures, it does have two distinct seasons: a dry season (October to April) and a wet season (May to September). During the dry season, the temperatures can be cooler, especially in the northern regions, but they generally remain comfortable. However, it's important to note that the concept of "winter" can be subjective. For those coming from colder climates, the dry season in Laos might feel like a mild winter. What is the hottest month in Laos? The hottest months in Laos are typically March and April. Temperatures can soar during this time, especially in the southern regions like Pakse and the 4000 Islands. It's important to note that while this is generally the hottest period, weather can vary slightly across different parts of the country. Is Laos a tropical country? Yes, Laos is a tropical country. It has a tropical monsoonal climate with two distinct seasons: Rainy season (May to October): The southwest monsoon brings abundant rainfall, averaging 50 to 90 inches (1,300 to 2,300 mm) annually. In some areas, like the Bolovens Plateau, rainfall can reach 160 inches (4,100 mm). Dry season (November to April): The northeast monsoon dominates, bringing cooler temperatures and less rainfall. Minimum temperatures range from 60 to 70 °F (16 to 21 °C) during the coolest months of December through February. Here are some additional details about Laos' climate: Temperature: Average annual temperatures are around 28 degrees Celsius (82 °F), but can vary depending on altitude and location. In the northern mountainous areas, temperatures can be lower, reaching as low as 15 or 10 °C (59 or 50 °F) during the cold season. Rainfall: Rainfall varies across the country, with the highest amounts recorded on the Bolaven Plateau. Geographical variations: Laos can be divided into three climatic zones based on altitude: Northern mountainous areas above 1,000 m: Montane temperate and hilly sub-tropical climate with lower temperatures. Central mountainous areas between 500 and 1,000 m: Tropical monsoonal climate with high temperatures and average rainfall. Tropical lowland plain and floodplains along the Mekong River: Tropical monsoonal climate with high temperatures and high rainfall. I hope this helps! Let me know if you have any other questions. Does Laos get cold? Yes, Laos can get cold, especially in the northern and mountainous regions. While the country is generally known for its tropical climate, temperatures can drop significantly during the dry season (November to February). Nights can be quite chilly, and in some areas, even frost can occur. However, the southern parts of Laos tend to remain warmer throughout the year. So, the experience of cold weather in Laos depends on the specific region you're visiting. Laos' weather FAQ Vientiane forecast Luang Prabang forecast Pakse forecast Vang Vieng forecast Champassak forecast

Get accurate and up-to-date weather forecasts for Muang Sing, Laos. Check current conditions, daily and weekly predictions, and historical data. Upcoming weather in Muang Sing Muang Sing's Air Quality & Pollen Muang Sing's weather Overview Weather in Muang Sing Muang Sing, a charming town nestled in the northern highlands of Laos, experiences a subtropical highland climate. This means you can expect pleasant temperatures throughout the year, with distinct wet and dry seasons. Wet Season (May-October) During the wet season, Muang Sing receives significant rainfall, often in the form of afternoon showers or thunderstorms. The lush greenery flourishes, and the landscape is transformed into a vibrant canvas of green. While the rainfall can occasionally be heavy, it generally doesn't disrupt daily activities. Dry Season (November-April) This is the hottest period, with average temperatures ranging from 25°C (77°F) to 35°C (95°F). Humidity levels are high, making it feel even hotter. Rainy Season (June to October) The dry season brings cooler temperatures and clear skies. It's an ideal time to explore the surrounding mountains, trek through the lush forests, or simply relax and enjoy the peaceful atmosphere. The nights can get quite chilly, especially in the higher elevations. Average Temperatures Average high temperature: 25-30°C (77-86°F) Average low temperature: 15-20°C (59-68°F) Best time to visit: The dry season (November-April) is generally considered the best time to visit Muang Sing. The weather is pleasant, and the landscape is at its most beautiful. However, the wet season also has its charm, with lush greenery and fewer crowds. Remember: Weather patterns can vary from year to year, so it's always a good idea to check the latest forecasts before your trip. Weather in Laos Stay informed and plan your day with our comprehensive weather forecast in Laos. Get accurate and up-to-date weather information, including temperature, humidity, precipitation, and more. Whether you're exploring the country's stunning landscapes or planning outdoor activities, our website provides the essential weather data you need. Vientiane forecast Luang Prabang forecast Pakse forecast Vang Vieng forecast Champassak forecast

Get accurate and up-to-date weather forecasts for Laos. Plan your trips, stay informed about seasonal changes, air quality and be prepared for any weather surprises with our reliable weather, forecast and Air Quality information. Weather in Laos Stay informed and plan your day with our comprehensive weather forecast in Laos. Get accurate and up-to-date weather information, including temperature, humidity, air quality, precipitation, and more. Whether you're exploring the country's stunning landscapes or planning outdoor activities, our website provides the essential weather data you need. Vientiane forecast Luang Prabang forecast Pakse forecast Vang Vieng forecast Champassak forecast Upcoming weather in Laos Vientiane Luang Prabang Pakse Laos' Air Quality & Pollen Laos' weather Overview Laos experiences a tropical monsoon climate, characterized by distinct wet and dry seasons. 1 The dry season, from November to April, 2 is generally cooler and drier, with comfortable temperatures and minimal rainfall. 3 The wet season, from May to October, is marked by heavy rainfall and higher humidity. 4 Temperatures remain warm throughout the year, with average highs ranging from the mid-20s to low 30s degrees Celsius. The mountainous regions in the north tend to be slightly cooler than the lowlands. Read more

Planning a trip to Vat Phou? Stay informed with our comprehensive weather forecasts. Find out the best time to visit based on temperature, air quality, pollen, rainfall, and more. Upcoming weather in Vat Phou Vat Phou's Air Quality & Pollen Vat Phou's weather Overview Weather in Vat Phou, Laos Vat Phou is a UNESCO World Heritage Site located in southern Laos , known for its ancient Khmer temple complex. Understanding the local weather conditions is crucial for planning your visit and ensuring a comfortable experience. Climate: Vat Phou experiences a tropical monsoon climate, characterized by: Hot and humid summers: From May to October, temperatures typically range between 25°C (77°F) and 35°C (95°F). Rainfall is abundant during this period, with frequent thunderstorms and occasional heavy showers. Mild winters: From November to April, the weather is cooler and drier. Temperatures can drop to around 15°C (59°F) at night, but daytime highs remain comfortable Tips for packing: Lightweight, breathable clothing: Pack loose-fitting, light-colored clothing to stay cool and comfortable in the hot and humid weather. Rain gear: Be prepared for rain showers, especially during the monsoon season. Bring a waterproof jacket, umbrella, or poncho. Sunscreen and hat : Protect yourself from the sun's rays, especially during the dry season when the UV index can be high. Comfortable shoes: Wear sturdy footwear suitable for walking on uneven terrain and exploring the temple complex. By understanding the weather conditions in Vat Phou, you can plan your trip accordingly and make the most of your visit to this fascinating historical site. Weather in Laos Stay informed and plan your day with our comprehensive weather forecast in Laos. Get accurate and up-to-date weather information, including temperature, humidity, precipitation, and more. Whether you're exploring the country's stunning landscapes or planning outdoor activities, our website provides the essential weather data you need. Vientiane forecast Luang Prabang forecast Pakse forecast Vang Vieng forecast Champassak forecast