Climate averages 1991–2020
Subulussalam weather
in September.
A hot, very wet month: the 9th warmest and the 6th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Subulussalam: daytime highs average 29.1°C and nights cool to about 21.4°C. By daytime temperature it is the 9th warmest of the 12 months.
Expect about 295 mm of rain on roughly 22 days, which makes September a very wet month (the 6th 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 Kabanjahe (83 km away). In September its highs average 25.0°C, 4.1°C cooler than Subulussalam, with 247 mm of rain.
Among the 200 cities listed in Indonesia, Subulussalam ranks joint 144th of 200 for the warmest September highs and 190th of 200 for the driest September (rainfall, lowest first). The mean September high of those 200 cities is 30.1°C; Subulussalam is 1.0°C cooler than that mean.
From September to October, average highs fall by 0.4°C to 28.6°C, and monthly rainfall rises from 295 mm to 419 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
Subulussalam climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 29.2°C20.9°C | 20.9°C | 329 | 26.3 | 12.012 h |
| February | 29.8°C20.9°C | 20.9°C | 294 | 24.1 | 12.012 h |
| March | 29.8°C21.4°C | 21.4°C | 339 | 28.1 | 12.112 h |
| April | 29.5°C21.8°C | 21.8°C | 368 | 27.3 | 12.212 h |
| May | 29.9°C22.1°C | 22.1°C | 264 | 21.4 | 12.212 h |
| June | 29.9°C21.8°C | 21.8°C | 150 | 16.7 | 12.312 h |
| July | 29.5°C21.4°C | 21.4°C | 160 | 17.7 | 12.312 h |
| August | 29.2°C21.4°C | 21.4°C | 238 | 20.7 | 12.212 h |
| September, selected | 29.1°C21.4°C | 21.4°C | 295 | 22.4 | 12.112 h |
| October | 28.6°C21.3°C | 21.3°C | 419 | 25.9 | 12.112 h |
| November | 28.4°C21.2°C | 21.2°C | 510 | 28.2 | 12.012 h |
| December | 28.6°C21.1°C | 21.1°C | 395 | 27.5 | 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
- Kabanjahe in SeptemberIndonesia · 83 kmHigh 25.0°C · Low 17.2°C · 247 mm rain
- Binjai in SeptemberIndonesia · 124 kmHigh 29.7°C · Low 21.9°C · 306 mm rain
- Sunggal in SeptemberIndonesia · 130 kmHigh 29.6°C · Low 22.2°C · 306 mm rain
- Medan in SeptemberIndonesia · 134 kmHigh 29.5°C · Low 22.5°C · 353 mm rain
- Pematangsiantar in SeptemberIndonesia · 136 kmHigh 27.5°C · Low 20.6°C · 361 mm rain
- Sibolga in SeptemberIndonesia · 143 kmHigh 28.8°C · Low 23.0°C · 293 mm rain
- Belawan in SeptemberIndonesia · 152 kmHigh 29.7°C · Low 23.2°C · 324 mm rain
- Percut in SeptemberIndonesia · 153 kmHigh 29.4°C · Low 23.2°C · 324 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 Subulussalam) is explained once on the Subulussalam year overview and on the Sources, method and limits page.