Climate averages 1991–2020
Batam weather
in September.
A hot, wet month: the joint 5th warmest and the 3rd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Batam: daytime highs average 28.1°C and nights cool to about 26.0°C. By daytime temperature it is the joint 5th warmest of the 12 months.
Expect about 148 mm of rain on roughly 20 days, which makes September a wet month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 07 min on an average September day.
The nearest other city in this atlas is Ulu Bedok (23 km away). In September its highs average 28.5°C, about as warm as Batam, with 148 mm of rain.
Among the 200 cities listed in Indonesia, Batam ranks joint 170th of 200 for the warmest September highs and 152nd of 200 for the driest September (rainfall, lowest first). The mean September high of those 200 cities is 30.1°C; Batam is 2.0°C cooler than that mean.
From September to October, average highs stay level at 28.0°C, and monthly rainfall rises from 148 mm to 190 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
Batam climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 27.2°C25.1°C | 25.1°C | 199 | 19.1 | 12.112 h |
| February | 27.7°C25.4°C | 25.4°C | 98 | 13.0 | 12.112 h |
| March | 28.2°C25.6°C | 25.6°C | 145 | 19.8 | 12.112 h |
| April | 28.5°C25.9°C | 25.9°C | 182 | 25.2 | 12.112 h |
| May | 28.5°C26.2°C | 26.2°C | 210 | 26.4 | 12.212 h |
| June | 28.5°C26.4°C | 26.4°C | 193 | 22.8 | 12.212 h |
| July | 28.1°C26.2°C | 26.2°C | 187 | 22.9 | 12.212 h |
| August | 28.0°C26.1°C | 26.1°C | 164 | 22.3 | 12.212 h |
| September, selected | 28.1°C26.0°C | 26.0°C | 148 | 19.9 | 12.112 h |
| October | 28.0°C25.6°C | 25.6°C | 190 | 23.8 | 12.112 h |
| November | 27.6°C25.3°C | 25.3°C | 290 | 27.8 | 12.112 h |
| December | 27.3°C25.2°C | 25.2°C | 298 | 24.8 | 12.112 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
- Ulu Bedok in SeptemberSingapore · 23 kmHigh 28.5°C · Low 25.3°C · 148 mm rain
- Singapore in SeptemberSingapore · 25 kmHigh 28.2°C · Low 25.7°C · 160 mm rain
- Pasir Gudang in SeptemberMalaysia · 37 kmHigh 28.9°C · Low 24.6°C · 177 mm rain
- Jurong Town in SeptemberSingapore · 39 kmHigh 28.5°C · Low 25.1°C · 160 mm rain
- Woodlands in SeptemberSingapore · 41 kmHigh 28.5°C · Low 25.1°C · 170 mm rain
- Johor Bahru in SeptemberMalaysia · 46 kmHigh 28.9°C · Low 24.5°C · 170 mm rain
- Iskandar Puteri in SeptemberMalaysia · 52 kmHigh 28.6°C · Low 25.1°C · 144 mm rain
- Tanjung Pinang in SeptemberIndonesia · 55 kmHigh 28.4°C · Low 25.9°C · 135 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 Batam) is explained once on the Batam year overview and on the Sources, method and limits page.