Climate averages 1991–2020
Sibu weather
in September.
A hot, very wet month: the joint 5th warmest and the 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Sibu: daytime highs average 30.3°C and nights cool to about 23.4°C. By daytime temperature it is the joint 5th warmest of the 12 months.
Expect about 242 mm of rain on roughly 25 days, which makes September a very wet month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 08 min on an average September day.
The nearest other city in this atlas is Bintulu (166 km away). In September its highs average 30.4°C, about as warm as Sibu, with 213 mm of rain.
Among the 72 cities listed in Malaysia, Sibu ranks joint 7th of 72 for the warmest September highs and joint 62nd of 72 for the driest September (rainfall, lowest first). The mean September high of those 72 cities is 29.6°C; Sibu is 0.7°C warmer than that mean.
From September to October, average highs fall by 0.3°C to 29.9°C, and monthly rainfall rises from 242 mm to 280 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
Sibu climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 29.2°C22.9°C | 22.9°C | 312 | 27.8 | 12.012 h |
| February | 29.6°C23.0°C | 23.0°C | 243 | 24.1 | 12.012 h |
| March | 30.2°C23.3°C | 23.3°C | 227 | 26.0 | 12.112 h |
| April | 30.5°C23.6°C | 23.6°C | 230 | 26.8 | 12.212 h |
| May | 30.5°C23.9°C | 23.9°C | 218 | 25.8 | 12.212 h |
| June | 30.4°C23.7°C | 23.7°C | 177 | 21.2 | 12.312 h |
| July | 30.3°C23.5°C | 23.5°C | 174 | 20.7 | 12.212 h |
| August | 30.5°C23.5°C | 23.5°C | 192 | 21.2 | 12.212 h |
| September, selected | 30.3°C23.4°C | 23.4°C | 242 | 24.6 | 12.112 h |
| October | 29.9°C23.3°C | 23.3°C | 280 | 28.0 | 12.112 h |
| November | 29.5°C23.2°C | 23.2°C | 307 | 28.7 | 12.012 h |
| December | 29.2°C23.0°C | 23.0°C | 344 | 29.0 | 12.012 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
- Bintulu in SeptemberMalaysia · 166 kmHigh 30.4°C · Low 23.6°C · 213 mm rain
- Kuching in SeptemberMalaysia · 185 kmHigh 30.2°C · Low 23.9°C · 257 mm rain
- Sintang in SeptemberIndonesia · 251 kmHigh 30.5°C · Low 23.4°C · 237 mm rain
- Miri in SeptemberMalaysia · 336 kmHigh 29.2°C · Low 24.7°C · 195 mm rain
- Marudi in SeptemberMalaysia · 348 kmHigh 30.8°C · Low 23.3°C · 221 mm rain
- Singkawang in SeptemberIndonesia · 351 kmHigh 29.3°C · Low 24.3°C · 203 mm rain
- Pontianak in SeptemberIndonesia · 379 kmHigh 30.3°C · Low 23.7°C · 191 mm rain
- Bandar Seri Begawan in SeptemberBrunei · 451 kmHigh 29.9°C · Low 24.4°C · 196 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 Sibu) is explained once on the Sibu year overview and on the Sources, method and limits page.