Climate Insights for Sainyabuli

The climate in Sainyabuli is warm and mild. The average annual temperature is 24°C and approximately 1701mm of precipitation falls per year. August is the wettest month, receiving around 404mm of rainfall. Sainyabuli is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: April, May, March. The coldest months are January, December, February, when temperatures can drop to 14°C.

Sainyabuli sees moderate temperature variation throughout the year, ranging from 14°C to 33°C. The warmest month is April, when average highs reach 33°C and the mean temperature sits around 27°C. January is the coolest month, with minimum temperatures around 14°C and an average of 20°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.

Sainyabuli is a fairly wet location, receiving approximately 1701mm of precipitation annually, which averages out to around 142mm per month. The wettest month is August, averaging 404mm of rainfall. July and September also tend to see above-average precipitation. The driest month is December, with just 17mm. That's 387mm 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.

Sainyabuli is relatively calm, with an average annual wind speed of 7km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is March, averaging 9km/h, though still comfortable for most outdoor activities. The calmest conditions occur in November, with average winds dropping to 6km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 3km/h gap between the calmest and windiest months.

It is currently spring in Sainyabuli, which began on March 20, 2026. Sainyabuli is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in April at around 33°C, while the coldest stretch bottoms out in January near 14°C. Summer is next, beginning on June 21, 2026 — 89 days from now.

The best time to visit Sainyabuli is during January, February, March, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 22°C with modest rainfall averaging 24mm per month. By contrast, April can be uncomfortably hot with temperatures reaching 33°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Sainyabuli 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.