Climate averages 1991–2020
Sơn La weather
in January.
A mild, fairly dry month: the coolest and the 3rd driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
January is a mild month in Sơn La: daytime highs average 20.9°C and nights cool to about 12.3°C. By daytime temperature it is the coolest month of the year.
Expect about 24 mm of rain on roughly 4 days, which makes January a fairly dry month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 59 min on an average January day.
The nearest other city in this atlas is Thị Trấn Thuận Châu (27 km away). In January its highs average 21.3°C, about as warm as Sơn La, with 39 mm of rain.
Among the 136 cities listed in Vietnam, Sơn La ranks 88th of 136 for the warmest January highs and joint 28th of 136 for the driest January (rainfall, lowest first). The mean January high of those 136 cities is 24.8°C; Sơn La is 3.9°C cooler than that mean.
From January to February, average highs rise by 2.7°C to 23.5°C, and monthly rainfall falls from 24 mm to 20 mm.
The annual picture
January in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Sơn La climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January, selected | 20.9°C12.3°C | 12.3°C | 24 | 4.0 | 11.011 h |
| February | 23.5°C13.8°C | 13.8°C | 20 | 3.7 | 11.411 h |
| March | 27.4°C16.9°C | 16.9°C | 50 | 7.1 | 12.012 h |
| April | 29.0°C19.5°C | 19.5°C | 72 | 12.7 | 12.613 h |
| May | 29.3°C21.3°C | 21.3°C | 147 | 19.3 | 13.113 h |
| June | 28.7°C22.2°C | 22.2°C | 209 | 23.0 | 13.413 h |
| July | 28.1°C22.1°C | 22.1°C | 288 | 24.5 | 13.313 h |
| August | 28.0°C21.8°C | 21.8°C | 283 | 25.2 | 12.913 h |
| September | 27.4°C20.9°C | 20.9°C | 150 | 17.5 | 12.312 h |
| October | 25.9°C18.8°C | 18.8°C | 49 | 8.3 | 11.712 h |
| November | 23.8°C15.7°C | 15.7°C | 26 | 4.5 | 11.111 h |
| December | 21.0°C12.4°C | 12.4°C | 23 | 3.6 | 10.911 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
January in nearby cities
- Thị Trấn Thuận Châu in JanuaryVietnam · 27 kmHigh 21.3°C · Low 12.6°C · 39 mm rain
- Dien Bien Phu in JanuaryVietnam · 93 kmHigh 22.7°C · Low 12.7°C · 35 mm rain
- Yên Bái in JanuaryVietnam · 112 kmHigh 18.3°C · Low 13.6°C · 43 mm rain
- Lào Cai in JanuaryVietnam · 129 kmHigh 18.9°C · Low 12.1°C · 96 mm rain
- Phú Thọ in JanuaryVietnam · 135 kmHigh 19.0°C · Low 13.9°C · 29 mm rain
- Tuyên Quang in JanuaryVietnam · 145 kmHigh 19.1°C · Low 13.7°C · 32 mm rain
- Việt Trì in JanuaryVietnam · 154 kmHigh 19.0°C · Low 13.8°C · 37 mm rain
- Ba Vì in JanuaryVietnam · 154 kmHigh 17.3°C · Low 12.0°C · 37 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Sơn La) is explained once on the Sơn La year overview and on the Sources, method and limits page.