Climate averages 1991–2020
Sơn Tây weather
in December.
A mild, fairly dry month: the 11th warmest and the 2nd driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
December is a mild month in Sơn Tây: daytime highs average 20.6°C and nights cool to about 14.7°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 29 mm of rain on roughly 7 days, which makes December a fairly dry month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 52 min on an average December day.
The nearest other city in this atlas is Ba Vì (14 km away). In December its highs average 18.5°C, 2.1°C cooler than Sơn Tây, with 32 mm of rain.
Among the 136 cities listed in Vietnam, Sơn Tây ranks joint 123rd of 136 for the warmest December highs and joint 7th of 136 for the driest December (rainfall, lowest first). The mean December high of those 136 cities is 25.0°C; Sơn Tây is 4.4°C cooler than that mean.
From December to January, average highs fall by 1.2°C to 19.4°C, and monthly rainfall rises from 29 mm to 37 mm.
The annual picture
December 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 Tây climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 19.4°C14.0°C | 14.0°C | 37 | 8.3 | 11.011 h |
| February | 21.6°C15.6°C | 15.6°C | 26 | 8.0 | 11.411 h |
| March | 24.9°C18.5°C | 18.5°C | 48 | 10.4 | 12.012 h |
| April | 28.9°C21.8°C | 21.8°C | 81 | 10.7 | 12.613 h |
| May | 31.1°C24.3°C | 24.3°C | 201 | 17.4 | 13.113 h |
| June | 32.3°C25.9°C | 25.9°C | 215 | 18.2 | 13.413 h |
| July | 31.9°C25.9°C | 25.9°C | 251 | 20.5 | 13.313 h |
| August | 31.2°C25.4°C | 25.4°C | 311 | 22.0 | 12.913 h |
| September | 30.0°C24.2°C | 24.2°C | 201 | 17.8 | 12.312 h |
| October | 27.8°C21.9°C | 21.9°C | 100 | 10.5 | 11.712 h |
| November | 24.6°C18.5°C | 18.5°C | 48 | 6.7 | 11.111 h |
| December, selected | 20.6°C14.7°C | 14.7°C | 29 | 6.5 | 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
December in nearby cities
- Ba Vì in DecemberVietnam · 14 kmHigh 18.5°C · Low 12.8°C · 32 mm rain
- Vĩnh Yên in DecemberVietnam · 21 kmHigh 20.8°C · Low 14.5°C · 29 mm rain
- Việt Trì in DecemberVietnam · 23 kmHigh 20.5°C · Low 14.6°C · 29 mm rain
- Phúc Yên in DecemberVietnam · 23 kmHigh 20.7°C · Low 14.1°C · 31 mm rain
- Bắc Từ Liêm in DecemberVietnam · 26 kmHigh 20.8°C · Low 14.1°C · 33 mm rain
- Tây Hồ in DecemberVietnam · 32 kmHigh 20.9°C · Low 14.0°C · 33 mm rain
- Hanoi in DecemberVietnam · 37 kmHigh 21.0°C · Low 14.1°C · 33 mm rain
- Sóc Sơn in DecemberVietnam · 38 kmHigh 20.9°C · Low 13.9°C · 31 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 Tây) is explained once on the Sơn Tây year overview and on the Sources, method and limits page.
Việt Trì and Vĩnh Yên lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.