Climate Insights for Vientiane

The climate in Vientiane is hot. The average annual temperature is 27°C and approximately 1,793 mm of precipitation falls per year. August is the wettest month, receiving around 400 mm of rainfall. Vientiane is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: April, March, May. The coldest months are January, December, February, when temperatures can drop to 17°C.The climate in Vientiane is hot. The average annual temperature is 81°F and approximately 70.6 in of precipitation falls per year. August is the wettest month, receiving around 15.7 in of rainfall. Vientiane is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: April, March, May. The coldest months are January, December, February, when temperatures can drop to 63°F.

Vientiane sees moderate temperature variation throughout the year, ranging from 17°C to 36°C. April is the hottest month, with daytime highs reaching 36°C and an average of 30°C. January is the coolest month, with minimum temperatures around 17°C and an average of 23°C. On average, daily temperatures fluctuate by about 10°C between overnight lows and afternoon highs. The sharpest temperature change occurs between February and March, with a 3°C shift in average temperatures.Vientiane sees moderate temperature variation throughout the year, ranging from 63°F to 97°F. April is the hottest month, with daytime highs reaching 97°F and an average of 86°F. January is the coolest month, with minimum temperatures around 63°F and an average of 73°F. On average, daily temperatures fluctuate by about 18°F between overnight lows and afternoon highs. The sharpest temperature change occurs between February and March, with a 6°F shift in average temperatures.

Vientiane is a fairly wet location, receiving approximately 1,793 mm of precipitation annually, which averages out to around 149 mm per month. The wettest month is August, averaging 400 mm of rainfall. July and September also tend to see above-average precipitation. The driest month is December, with just 6 mm. That's 394 mm less than August, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.Vientiane is a fairly wet location, receiving approximately 70.6 in of precipitation annually, which averages out to around 5.9 in per month. The wettest month is August, averaging 15.7 in of rainfall. July and September also tend to see above-average precipitation. The driest month is December, with just 0.2 in. That's 15.5 in less than August, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

Vientiane is relatively calm, with an average annual wind speed of 6km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is February, averaging 7km/h, though still comfortable for most outdoor activities. The calmest conditions occur in October, with average winds dropping to 5km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 2km/h gap between the calmest and windiest months.Vientiane is relatively calm, with an average annual wind speed of 4mph. For context, sustained winds below 7mph are generally light, while anything above 16mph is considered strong. The windiest month is February, averaging 4mph, though still comfortable for most outdoor activities. The calmest conditions occur in October, with average winds dropping to 3mph, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 1mph gap between the calmest and windiest months.

The best time to visit Vientiane is during January, February and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 24°C with modest rainfall averaging 14 mm per month. By contrast, April can be uncomfortably hot with temperatures reaching 36°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.The best time to visit Vientiane is during January, February and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 74°F with modest rainfall averaging 0.6 in per month. By contrast, April can be uncomfortably hot with temperatures reaching 97°F. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Vientiane based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.The table below shows monthly climate averages for Vientiane based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Fahrenheit (°F). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in miles per hour (mph). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.