Climate averages 1991–2020
Pekanbaru weather
in December.
A hot, very wet month: the coolest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a hot month in Pekanbaru: daytime highs average 28.9°C and nights cool to about 22.9°C. By daytime temperature it is the coolest month of the year.
Expect about 263 mm of rain on roughly 27 days, which makes December a very wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 05 min on an average December day.
The nearest other city in this atlas is Payakumbuh (121 km away). In December its highs average 26.7°C, 2.1°C cooler than Pekanbaru, with 292 mm of rain.
Among the 200 cities listed in Indonesia, Pekanbaru ranks joint 86th of 200 for the warmest December highs and 27th of 200 for the driest December (rainfall, lowest first). The mean December high of those 200 cities is 28.4°C; Pekanbaru is 0.4°C warmer than that mean.
From December to January, average highs rise by 0.1°C to 29.0°C, and monthly rainfall falls from 263 mm to 210 mm.
The annual picture
December 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 | 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, selected | 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
December in nearby cities
- Payakumbuh in DecemberIndonesia · 121 kmHigh 26.7°C · Low 20.4°C · 292 mm rain
- Dumai in DecemberIndonesia · 128 kmHigh 28.7°C · Low 23.4°C · 343 mm rain
- Bukittinggi in DecemberIndonesia · 150 kmHigh 24.9°C · Low 18.8°C · 391 mm rain
- Solok in DecemberIndonesia · 170 kmHigh 26.8°C · Low 20.9°C · 228 mm rain
- Pariaman in DecemberIndonesia · 194 kmHigh 28.2°C · Low 22.8°C · 453 mm rain
- Padang in DecemberIndonesia · 203 kmHigh 28.2°C · Low 23.3°C · 387 mm rain
- Malacca in DecemberMalaysia · 207 kmHigh 28.4°C · Low 24.5°C · 218 mm rain
- Muar in DecemberMalaysia · 211 kmHigh 28.3°C · Low 24.2°C · 239 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.