Climate averages 1991–2020
Bandar Seri Begawan weather
in September.
A hot, very wet month: the joint 6th warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Bandar Seri Begawan: daytime highs average 29.9°C and nights cool to about 24.4°C. By daytime temperature it is the joint 6th warmest of the 12 months.
Expect about 196 mm of rain on roughly 23 days, which makes September a very wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 09 min on an average September day.
The nearest other city in this atlas is Labuan (55 km away). In September its highs average 29.3°C, 0.6°C cooler than Bandar Seri Begawan, with 158 mm of rain.
From September to October, average highs fall by 0.7°C to 29.2°C, and monthly rainfall rises from 196 mm to 254 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
Bandar Seri Begawan climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 28.7°C23.9°C | 23.9°C | 162 | 19.2 | 11.912 h |
| February | 29.0°C24.0°C | 24.0°C | 105 | 13.4 | 12.012 h |
| March | 29.9°C24.3°C | 24.3°C | 91 | 15.7 | 12.112 h |
| April | 30.5°C24.7°C | 24.7°C | 131 | 19.4 | 12.212 h |
| May | 30.5°C24.9°C | 24.9°C | 148 | 21.5 | 12.312 h |
| June | 30.2°C24.7°C | 24.7°C | 185 | 19.6 | 12.412 h |
| July | 30.0°C24.5°C | 24.5°C | 179 | 21.1 | 12.412 h |
| August | 30.2°C24.6°C | 24.6°C | 182 | 21.3 | 12.312 h |
| September, selected | 29.9°C24.4°C | 24.4°C | 196 | 23.0 | 12.112 h |
| October | 29.2°C24.1°C | 24.1°C | 254 | 26.9 | 12.012 h |
| November | 29.1°C24.1°C | 24.1°C | 232 | 26.0 | 11.912 h |
| December | 28.9°C24.0°C | 24.0°C | 222 | 24.7 | 11.812 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
- Labuan in SeptemberMalaysia · 55 kmHigh 29.3°C · Low 25.2°C · 158 mm rain
- Marudi in SeptemberMalaysia · 105 kmHigh 30.8°C · Low 23.3°C · 221 mm rain
- Miri in SeptemberMalaysia · 118 kmHigh 29.2°C · Low 24.7°C · 195 mm rain
- Keningau in SeptemberMalaysia · 144 kmHigh 29.9°C · Low 21.7°C · 122 mm rain
- Putatan in SeptemberMalaysia · 169 kmHigh 29.2°C · Low 23.9°C · 173 mm rain
- Kota Kinabalu in SeptemberMalaysia · 174 kmHigh 29.1°C · Low 24.2°C · 173 mm rain
- Bintulu in SeptemberMalaysia · 285 kmHigh 30.4°C · Low 23.6°C · 213 mm rain
- Tawau in SeptemberMalaysia · 335 kmHigh 29.0°C · Low 24.2°C · 176 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 Bandar Seri Begawan) is explained once on the Bandar Seri Begawan year overview and on the Sources, method and limits page.