Climate averages 1991–2020
Việt Yên 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 Việt Yên: daytime highs average 30.3°C and nights cool to about 23.8°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 230 mm of rain on roughly 19 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 Bắc Giang (6 km away). In September its highs average 30.1°C, about as warm as Việt Yên, with 230 mm of rain.
Among the 136 cities listed in Vietnam, Việt Yên ranks joint 28th of 136 for the warmest September highs and joint 33rd of 136 for the driest September (rainfall, lowest first). The mean September high of those 136 cities is 29.7°C; Việt Yên is 0.6°C warmer than that mean.
From September to October, average highs fall by 2.0°C to 28.3°C, and monthly rainfall falls from 230 mm to 107 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
Việt Yên climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 19.3°C13.1°C | 13.1°C | 36 | 7.1 | 11.011 h |
| February | 21.4°C14.8°C | 14.8°C | 24 | 6.7 | 11.411 h |
| March | 24.5°C17.8°C | 17.8°C | 50 | 10.2 | 12.012 h |
| April | 28.4°C21.3°C | 21.3°C | 85 | 11.7 | 12.613 h |
| May | 30.8°C24.0°C | 24.0°C | 261 | 19.2 | 13.113 h |
| June | 32.2°C25.7°C | 25.7°C | 285 | 21.0 | 13.413 h |
| July | 32.0°C25.8°C | 25.8°C | 301 | 23.5 | 13.313 h |
| August | 31.3°C25.2°C | 25.2°C | 360 | 25.0 | 12.913 h |
| September, selected | 30.3°C23.8°C | 23.8°C | 230 | 19.1 | 12.312 h |
| October | 28.3°C21.2°C | 21.2°C | 107 | 11.6 | 11.712 h |
| November | 25.0°C17.6°C | 17.6°C | 57 | 7.3 | 11.111 h |
| December | 20.9°C13.7°C | 13.7°C | 33 | 6.2 | 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
September in nearby cities
- Bắc Giang in SeptemberVietnam · 6 kmHigh 30.1°C · Low 23.7°C · 230 mm rain
- Cung Kiệm in SeptemberVietnam · 9 kmHigh 30.4°C · Low 23.9°C · 230 mm rain
- Bắc Ninh in SeptemberVietnam · 11 kmHigh 30.4°C · Low 24.0°C · 233 mm rain
- Thuận Thanh in SeptemberVietnam · 25 kmHigh 30.4°C · Low 24.1°C · 248 mm rain
- Chí Linh in SeptemberVietnam · 29 kmHigh 30.3°C · Low 24.1°C · 243 mm rain
- Sóc Sơn in SeptemberVietnam · 29 kmHigh 30.4°C · Low 24.1°C · 229 mm rain
- Phổ Yên in SeptemberVietnam · 30 kmHigh 30.2°C · Low 23.8°C · 211 mm rain
- Long Bien in SeptemberVietnam · 35 kmHigh 30.3°C · Low 24.1°C · 248 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 Việt Yên) is explained once on the Việt Yên year overview and on the Sources, method and limits page.
Bắc Giang and Cung Kiệm lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.