Climate averages 1991–2020
Banda Aceh weather
in September.
A hot, very wet month: the joint 7th 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 Banda Aceh: daytime highs average 29.4°C and nights cool to about 24.5°C. By daytime temperature it is the joint 7th warmest of the 12 months.
Expect about 192 mm of rain on roughly 19 days, which makes September a very wet month (the 7th 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 Lhokseumawe (205 km away). In September its highs average 29.1°C, about as warm as Banda Aceh, with 92 mm of rain.
Among the 200 cities listed in Indonesia, Banda Aceh ranks joint 130th of 200 for the warmest September highs and 170th of 200 for the driest September (rainfall, lowest first). The mean September high of those 200 cities is 30.1°C; Banda Aceh is 0.7°C cooler than that mean.
From September to October, average highs fall by 0.7°C to 28.6°C, and monthly rainfall rises from 192 mm to 282 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
Banda Aceh climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 28.8°C24.0°C | 24.0°C | 137 | 15.0 | 11.812 h |
| February | 29.4°C24.1°C | 24.1°C | 98 | 13.2 | 11.912 h |
| March | 29.8°C24.4°C | 24.4°C | 156 | 19.0 | 12.112 h |
| April | 29.8°C24.8°C | 24.8°C | 202 | 24.4 | 12.212 h |
| May | 29.9°C25.2°C | 25.2°C | 219 | 20.4 | 12.412 h |
| June | 30.2°C25.3°C | 25.3°C | 113 | 14.5 | 12.412 h |
| July | 30.0°C25.0°C | 25.0°C | 125 | 15.1 | 12.412 h |
| August | 29.8°C24.8°C | 24.8°C | 159 | 17.3 | 12.312 h |
| September, selected | 29.4°C24.5°C | 24.5°C | 192 | 19.2 | 12.212 h |
| October | 28.6°C24.2°C | 24.2°C | 282 | 24.6 | 12.012 h |
| November | 28.3°C24.0°C | 24.0°C | 361 | 26.1 | 11.912 h |
| December | 28.4°C24.0°C | 24.0°C | 262 | 20.9 | 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
- Lhokseumawe in SeptemberIndonesia · 205 kmHigh 29.1°C · Low 24.8°C · 92 mm rain
- Langsa in SeptemberIndonesia · 315 kmHigh 29.6°C · Low 23.9°C · 179 mm rain
- Binjai in SeptemberIndonesia · 411 kmHigh 29.7°C · Low 21.9°C · 306 mm rain
- Belawan in SeptemberIndonesia · 420 kmHigh 29.7°C · Low 23.2°C · 324 mm rain
- Sunggal in SeptemberIndonesia · 424 kmHigh 29.6°C · Low 22.2°C · 306 mm rain
- Subulussalam in SeptemberIndonesia · 427 kmHigh 29.1°C · Low 21.4°C · 295 mm rain
- Phuket in SeptemberThailand · 427 kmHigh 27.8°C · Low 25.7°C · 311 mm rain
- Medan in SeptemberIndonesia · 429 kmHigh 29.5°C · Low 22.5°C · 353 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 Banda Aceh) is explained once on the Banda Aceh year overview and on the Sources, method and limits page.