Climate averages 1991–2020
Pekanbaru weather
in September.
A hot, very wet month: the joint 3rd 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 Pekanbaru: daytime highs average 30.3°C and nights cool to about 23.1°C. By daytime temperature it is the joint 3rd warmest of the 12 months.
Expect about 195 mm of rain on roughly 24 days, which makes September a very wet month (the 6th 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 Payakumbuh (121 km away). In September its highs average 27.9°C, 2.4°C cooler than Pekanbaru, with 213 mm of rain.
Among the 200 cities listed in Indonesia, Pekanbaru ranks joint 94th of 200 for the warmest September highs and joint 171st of 200 for the driest September (rainfall, lowest first). The mean September high of those 200 cities is 30.1°C; Pekanbaru is 0.2°C warmer than that mean.
From September to October, average highs fall by 0.2°C to 30.1°C, and monthly rainfall rises from 195 mm to 241 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
Pekanbaru climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 29.0°C22.7°C | 22.7°C | 210 | 24.2 | 12.112 h |
| February | 29.6°C22.9°C | 22.9°C | 159 | 21.3 | 12.112 h |
| March | 30.0°C23.2°C | 23.2°C | 213 | 26.1 | 12.112 h |
| April | 30.2°C23.5°C | 23.5°C | 233 | 27.8 | 12.112 h |
| May | 30.4°C23.9°C | 23.9°C | 191 | 24.9 | 12.112 h |
| June | 30.3°C23.7°C | 23.7°C | 131 | 19.6 | 12.212 h |
| July | 30.2°C23.3°C | 23.3°C | 124 | 19.0 | 12.112 h |
| August | 30.4°C23.2°C | 23.2°C | 157 | 22.0 | 12.112 h |
| September, selected | 30.3°C23.1°C | 23.1°C | 195 | 23.8 | 12.112 h |
| October | 30.1°C23.1°C | 23.1°C | 241 | 27.0 | 12.112 h |
| November | 29.3°C23.0°C | 23.0°C | 298 | 27.9 | 12.112 h |
| December | 28.9°C22.9°C | 22.9°C | 263 | 26.8 | 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
- Payakumbuh in SeptemberIndonesia · 121 kmHigh 27.9°C · Low 20.4°C · 213 mm rain
- Dumai in SeptemberIndonesia · 128 kmHigh 30.2°C · Low 23.6°C · 253 mm rain
- Bukittinggi in SeptemberIndonesia · 150 kmHigh 25.9°C · Low 18.6°C · 396 mm rain
- Solok in SeptemberIndonesia · 170 kmHigh 28.1°C · Low 21.2°C · 157 mm rain
- Pariaman in SeptemberIndonesia · 194 kmHigh 28.2°C · Low 22.7°C · 406 mm rain
- Padang in SeptemberIndonesia · 203 kmHigh 28.3°C · Low 23.2°C · 354 mm rain
- Malacca in SeptemberMalaysia · 207 kmHigh 28.7°C · Low 25.0°C · 189 mm rain
- Muar in SeptemberMalaysia · 211 kmHigh 28.8°C · Low 24.7°C · 180 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 Pekanbaru) is explained once on the Pekanbaru year overview and on the Sources, method and limits page.