Climate Insights for Sisavan

The climate in Sisavan is temperate. The average annual temperature is 10°C and approximately 545mm of precipitation falls per year. March is the wettest month, receiving around 92mm of rainfall. Sisavan is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, July, June. The coldest months are January, December, February, when temperatures can drop to -7°C. Snowfall occurs from January to December, with around 97cm accumulating over the season.

Sisavan has a wide annual temperature range, spanning 37°C from the coldest to warmest months. The warmest month is August, when average highs reach 30°C and the mean temperature sits around 24°C. The coldest month is January, when overnight lows fall to -7°C and the daily average is -3°C. On average, daily temperatures fluctuate by about 11°C between overnight lows and afternoon highs. The sharpest temperature change occurs between September and October, with a 8°C shift in average temperatures.

Sisavan is a relatively dry area, receiving approximately 545mm of precipitation annually, which averages out to around 45mm per month. The wettest month is March, averaging 92mm of rainfall. May and April also tend to see above-average precipitation. The driest month is September, with just 14mm. That's 78mm less than March, 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. Snowfall is a regular feature from January to December, with around 97cm accumulating over the season. March typically sees the most snow at around 24cm.

Sisavan is relatively calm, with an average annual wind speed of 9km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is June, averaging 11km/h, though still comfortable for most outdoor activities. The calmest conditions occur in November, with average winds dropping to 7km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 4km/h gap between the calmest and windiest months. Wind tends to pick up during the summer months. The seasonal averages are 8km/h in winter, 10km/h in spring, 11km/h in summer, 8km/h in autumn.

It is currently spring in Sisavan, which began on March 20, 2026. Sisavan 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 August at around 30°C, while the coldest stretch bottoms out in January near -7°C. Summer is next, beginning on June 21, 2026 — 89 days from now.

The best time to visit Sisavan is during June, July, August and September, 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, January can be quite cold with temperatures dropping to -7°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Sisavan 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. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. 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.