Climate averages 1991–2020
Biên Hòa weather
in September.
A hot, very wet month: the 9th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Biên Hòa: daytime highs average 30.2°C and nights cool to about 24.1°C. By daytime temperature it is the 9th warmest of the 12 months.
Expect about 301 mm of rain on roughly 28 days, which makes September a very wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 12 min on an average September day.
The nearest other city in this atlas is Thủ Đức (12 km away). In September its highs average 30.2°C, about as warm as Biên Hòa, with 295 mm of rain.
Among the 136 cities listed in Vietnam, Biên Hòa ranks joint 42nd of 136 for the warmest September highs and joint 109th of 136 for the driest September (rainfall, lowest first). The mean September high of those 136 cities is 29.7°C; Biên Hòa is 0.6°C warmer than that mean.
From September to October, average highs fall by 0.3°C to 29.9°C, and monthly rainfall falls from 301 mm to 250 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
Biên Hòa climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 31.1°C22.0°C | 22.0°C | 21 | 3.9 | 11.612 h |
| February | 32.7°C22.7°C | 22.7°C | 8.4 | 1.6 | 11.812 h |
| March | 33.9°C24.2°C | 24.2°C | 25 | 4.9 | 12.112 h |
| April | 34.0°C25.2°C | 25.2°C | 75 | 12.3 | 12.412 h |
| May | 32.6°C25.4°C | 25.4°C | 205 | 23.9 | 12.613 h |
| June | 30.9°C24.8°C | 24.8°C | 256 | 26.9 | 12.813 h |
| July | 30.4°C24.4°C | 24.4°C | 276 | 28.7 | 12.713 h |
| August | 30.5°C24.3°C | 24.3°C | 283 | 28.8 | 12.512 h |
| September, selected | 30.2°C24.1°C | 24.1°C | 301 | 28.3 | 12.212 h |
| October | 29.9°C23.7°C | 23.7°C | 250 | 26.4 | 11.912 h |
| November | 30.0°C23.2°C | 23.2°C | 122 | 15.4 | 11.612 h |
| December | 30.1°C22.4°C | 22.4°C | 54 | 8.6 | 11.511 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
- Thủ Đức in SeptemberVietnam · 12 kmHigh 30.2°C · Low 24.0°C · 295 mm rain
- Thuận An in SeptemberVietnam · 12 kmHigh 30.2°C · Low 23.8°C · 301 mm rain
- Thủ Dầu Một in SeptemberVietnam · 19 kmHigh 30.1°C · Low 23.8°C · 301 mm rain
- Ho Chi Minh City in SeptemberVietnam · 25 kmHigh 30.4°C · Low 24.1°C · 295 mm rain
- Quận Mười in SeptemberVietnam · 26 kmHigh 30.2°C · Low 24.1°C · 295 mm rain
- Quận Sáu in SeptemberVietnam · 29 kmHigh 30.5°C · Low 24.1°C · 295 mm rain
- Bến Cát in SeptemberVietnam · 33 kmHigh 30.3°C · Low 23.8°C · 304 mm rain
- Củ Chi in SeptemberVietnam · 36 kmHigh 30.4°C · Low 23.9°C · 312 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 Biên Hòa) is explained once on the Biên Hòa year overview and on the Sources, method and limits page.
Thuận An and Thủ Dầu Một lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.