Climate averages 1991–2020
Sumber weather
in September.
A hot, fairly dry month: the warmest and the 2nd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Sumber: daytime highs average 32.0°C and nights cool to about 24.0°C. By daytime temperature it is the warmest month of the year.
Expect about 28 mm of rain on roughly 5 days, which makes September a fairly dry month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 04 min on an average September day.
The nearest other city in this atlas is Palimanan (9 km away). In September its highs average 32.3°C, about as warm as Sumber, with 28 mm of rain.
Among the 200 cities listed in Indonesia, Sumber ranks joint 33rd of 200 for the warmest September highs and joint 30th of 200 for the driest September (rainfall, lowest first). The mean September high of those 200 cities is 30.1°C; Sumber is 1.9°C warmer than that mean.
From September to October, average highs fall by 0.2°C to 31.8°C, and monthly rainfall rises from 28 mm to 86 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
Sumber climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 29.1°C24.3°C | 24.3°C | 340 | 29.6 | 12.512 h |
| February | 29.1°C24.2°C | 24.2°C | 318 | 27.5 | 12.312 h |
| March | 29.5°C24.4°C | 24.4°C | 311 | 29.5 | 12.112 h |
| April | 29.8°C24.7°C | 24.7°C | 209 | 25.6 | 12.012 h |
| May | 30.0°C24.6°C | 24.6°C | 96 | 17.2 | 11.812 h |
| June | 30.1°C24.2°C | 24.2°C | 56 | 10.7 | 11.712 h |
| July | 30.5°C23.7°C | 23.7°C | 31 | 6.0 | 11.812 h |
| August | 31.2°C23.5°C | 23.5°C | 13 | 3.1 | 11.912 h |
| September, selected | 32.0°C24.0°C | 24.0°C | 28 | 4.9 | 12.112 h |
| October | 31.8°C24.7°C | 24.7°C | 86 | 12.5 | 12.212 h |
| November | 30.6°C24.9°C | 24.9°C | 228 | 23.1 | 12.412 h |
| December | 29.6°C24.5°C | 24.5°C | 343 | 28.9 | 12.513 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
- Palimanan in SeptemberIndonesia · 9 kmHigh 32.3°C · Low 24.2°C · 28 mm rain
- Cirebon in SeptemberIndonesia · 10 kmHigh 31.3°C · Low 24.4°C · 28 mm rain
- Arjawinangun in SeptemberIndonesia · 15 kmHigh 32.1°C · Low 24.5°C · 28 mm rain
- Astanajapura in SeptemberIndonesia · 17 kmHigh 31.6°C · Low 24.1°C · 21 mm rain
- Kuningan in SeptemberIndonesia · 24 kmHigh 29.1°C · Low 20.7°C · 44 mm rain
- Majalengka in SeptemberIndonesia · 29 kmHigh 32.5°C · Low 22.2°C · 48 mm rain
- Jatibarang in SeptemberIndonesia · 37 kmHigh 33.0°C · Low 24.0°C · 28 mm rain
- Indramayu in SeptemberIndonesia · 51 kmHigh 32.8°C · Low 24.4°C · 20 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 Sumber) is explained once on the Sumber year overview and on the Sources, method and limits page.
Cirebon, Arjawinangun and Palimanan lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.