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Sơn La Weather by Month
Average temperatures, rainfall and humidity for Sơn La, Vietnam, month by month, built from OpenWeather’s historical records. Use it to see what a typical Sơn La month looks like before you travel — then check the live Sơn La forecast for the days ahead.
Warmest month
April
25°C average high
Coolest month
January
8°C average low
Wettest month
July
199 mm of rain
Driest month
February
42 mm of rain
Average temperature and rainfall in Sơn La by month
Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.
| Month | Avg high | Avg low | Record low / high | Rainfall | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 16°C | 8°C | -2°C / 26°C | 50 mm | 86% | 3 km/h |
| February | 18°C | 9°C | 0°C / 32°C | 42 mm | 81% | 3 km/h |
| March | 23°C | 13°C | 3°C / 38°C | 81 mm | 74% | 4 km/h |
| April | 25°C | 16°C | 4°C / 39°C | 128 mm | 71% | 4 km/h |
| May | 25°C | 17°C | 9°C / 39°C | 130 mm | 79% | 3 km/h |
| June | 25°C | 18°C | 11°C / 34°C | 159 mm | 86% | 4 km/h |
| July | 24°C | 18°C | 15°C / 30°C | 199 mm | 89% | 3 km/h |
| August | 24°C | 18°C | 14°C / 30°C | 173 mm | 91% | 3 km/h |
| September | 24°C | 17°C | 13°C / 29°C | 114 mm | 89% | 3 km/h |
| October | 21°C | 15°C | 7°C / 29°C | 74 mm | 88% | 3 km/h |
| November | 19°C | 12°C | 4°C / 29°C | 49 mm | 87% | 3 km/h |
| December | 16°C | 9°C | -2°C / 26°C | 51 mm | 87% | 3 km/h |
Best time to visit Sơn La
The most comfortable time to visit Sơn La is generally March to May, balancing mild daytime temperatures against the driest stretch of the year. The city has a moderate seasonal swing and rain concentrates around July, totalling about 1,251 mm a year.
Travellers who prefer heat should aim for April, when highs average 25°C. July is the month to avoid if rain would spoil your plans — it averages 199 mm, roughly 5× the rainfall of the driest month (February).
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Sơn La forecast for what is happening now.