Climate averages 1991–2020
Yên Bái weather
in September.
A hot, very wet month: the 5th warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Yên Bái: daytime highs average 29.5°C and nights cool to about 24.0°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 229 mm of rain on roughly 20 days, which makes September a very wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 17 min on an average September day.
The nearest other city in this atlas is Tuyên Quang (33 km away). In September its highs average 30.3°C, 0.8°C warmer than Yên Bái, with 232 mm of rain.
Among the 136 cities listed in Vietnam, Yên Bái ranks joint 100th of 136 for the warmest September highs and joint 30th of 136 for the driest September (rainfall, lowest first). The mean September high of those 136 cities is 29.7°C; Yên Bái is 0.2°C cooler than that mean.
From September to October, average highs fall by 2.4°C to 27.1°C, and monthly rainfall falls from 229 mm to 115 mm.
The annual picture
September 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
Yên Bái climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 18.3°C13.6°C | 13.6°C | 43 | 9.0 | 11.011 h |
| February | 20.4°C14.9°C | 14.9°C | 33 | 7.3 | 11.411 h |
| March | 24.0°C17.9°C | 17.9°C | 70 | 10.5 | 12.012 h |
| April | 27.9°C21.3°C | 21.3°C | 126 | 13.1 | 12.613 h |
| May | 30.0°C23.7°C | 23.7°C | 294 | 20.0 | 13.213 h |
| June | 31.2°C25.1°C | 25.1°C | 398 | 23.1 | 13.413 h |
| July | 30.9°C25.1°C | 25.1°C | 407 | 25.6 | 13.313 h |
| August | 30.6°C24.9°C | 24.9°C | 415 | 25.0 | 12.913 h |
| September, selected | 29.5°C24.0°C | 24.0°C | 229 | 19.6 | 12.312 h |
| October | 27.1°C22.0°C | 22.0°C | 115 | 12.5 | 11.712 h |
| November | 23.8°C18.5°C | 18.5°C | 64 | 8.0 | 11.111 h |
| December | 19.7°C14.7°C | 14.7°C | 41 | 7.9 | 10.811 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
September in nearby cities
- Tuyên Quang in SeptemberVietnam · 33 kmHigh 30.3°C · Low 24.2°C · 232 mm rain
- Phú Thọ in SeptemberVietnam · 48 kmHigh 30.0°C · Low 24.2°C · 225 mm rain
- Việt Trì in SeptemberVietnam · 67 kmHigh 30.1°C · Low 24.2°C · 201 mm rain
- Thị Trấn Đại Từ in SeptemberVietnam · 76 kmHigh 30.5°C · Low 24.2°C · 206 mm rain
- Bắc Quang in SeptemberVietnam · 85 kmHigh 30.4°C · Low 23.9°C · 226 mm rain
- Vĩnh Yên in SeptemberVietnam · 85 kmHigh 30.4°C · Low 24.3°C · 201 mm rain
- Ba Vì in SeptemberVietnam · 86 kmHigh 27.9°C · Low 22.2°C · 236 mm rain
- Sơn Tây in SeptemberVietnam · 89 kmHigh 30.0°C · Low 24.2°C · 201 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 Yên Bái) is explained once on the Yên Bái year overview and on the Sources, method and limits page.