Climate averages 1991–2020
Sơn Tây weather
in May.
A hot, very wet month: the 4th warmest and the joint 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a hot month in Sơn Tây: daytime highs average 31.1°C and nights cool to about 24.3°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 201 mm of rain on roughly 17 days, which makes May a very wet month (the joint 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 08 min on an average May day.
The nearest other city in this atlas is Ba Vì (14 km away). In May its highs average 29.0°C, 2.0°C cooler than Sơn Tây, with 244 mm of rain.
Among the 136 cities listed in Vietnam, Sơn Tây ranks joint 73rd of 136 for the warmest May highs and joint 69th of 136 for the driest May (rainfall, lowest first). The mean May high of those 136 cities is 31.2°C; Sơn Tây is 0.1°C cooler than that mean.
From May to June, average highs rise by 1.3°C to 32.3°C, and monthly rainfall rises from 201 mm to 215 mm.
The annual picture
May 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, selected | 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 | 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
May in nearby cities
- Ba Vì in MayVietnam · 14 kmHigh 29.0°C · Low 22.2°C · 244 mm rain
- Vĩnh Yên in MayVietnam · 21 kmHigh 31.0°C · Low 24.3°C · 201 mm rain
- Việt Trì in MayVietnam · 23 kmHigh 30.9°C · Low 24.2°C · 201 mm rain
- Phúc Yên in MayVietnam · 23 kmHigh 31.0°C · Low 24.2°C · 241 mm rain
- Bắc Từ Liêm in MayVietnam · 26 kmHigh 31.0°C · Low 24.2°C · 232 mm rain
- Tây Hồ in MayVietnam · 32 kmHigh 31.0°C · Low 24.2°C · 232 mm rain
- Hanoi in MayVietnam · 37 kmHigh 31.1°C · Low 24.2°C · 232 mm rain
- Sóc Sơn in MayVietnam · 38 kmHigh 30.9°C · Low 24.2°C · 241 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.