Climate averages 1991–2020
Dumai weather
in April.
A hot, very wet month: the joint 3rd warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
April is a hot month in Dumai: daytime highs average 30.3°C and nights cool to about 24.1°C. By daytime temperature it is the joint 3rd warmest of the 12 months.
Expect about 249 mm of rain on roughly 28 days, which makes April a very wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 09 min on an average April day.
The nearest other city in this atlas is Port Dickson (103 km away). In April its highs average 29.7°C, 0.7°C cooler than Dumai, with 192 mm of rain.
Among the 200 cities listed in Indonesia, Dumai ranks joint 6th of 200 for the warmest April highs and joint 104th of 200 for the driest April (rainfall, lowest first). The mean April high of those 200 cities is 29.0°C; Dumai is 1.3°C warmer than that mean.
From April to May, average highs rise by 0.2°C to 30.5°C, and monthly rainfall falls from 249 mm to 224 mm.
The annual picture
April 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
Dumai climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 28.9°C23.4°C | 23.4°C | 201 | 21.3 | 12.012 h |
| February | 29.7°C23.6°C | 23.6°C | 125 | 16.9 | 12.112 h |
| March | 30.2°C23.9°C | 23.9°C | 217 | 25.1 | 12.112 h |
| April, selected | 30.3°C24.1°C | 24.1°C | 249 | 27.6 | 12.212 h |
| May | 30.5°C24.3°C | 24.3°C | 224 | 26.3 | 12.212 h |
| June | 30.5°C24.2°C | 24.2°C | 156 | 21.2 | 12.212 h |
| July | 30.3°C23.9°C | 23.9°C | 162 | 20.4 | 12.212 h |
| August | 30.3°C23.8°C | 23.8°C | 195 | 24.0 | 12.212 h |
| September | 30.2°C23.6°C | 23.6°C | 253 | 26.1 | 12.112 h |
| October | 29.8°C23.6°C | 23.6°C | 308 | 28.2 | 12.112 h |
| November | 29.1°C23.4°C | 23.4°C | 387 | 28.5 | 12.012 h |
| December | 28.7°C23.4°C | 23.4°C | 343 | 27.7 | 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
April in nearby cities
- Port Dickson in AprilMalaysia · 103 kmHigh 29.7°C · Low 25.0°C · 192 mm rain
- Malacca in AprilMalaysia · 106 kmHigh 29.5°C · Low 25.2°C · 206 mm rain
- Sepang in AprilMalaysia · 119 kmHigh 29.5°C · Low 24.7°C · 224 mm rain
- Pekanbaru in AprilIndonesia · 128 kmHigh 30.2°C · Low 23.5°C · 233 mm rain
- Seremban in AprilMalaysia · 130 kmHigh 29.9°C · Low 24.0°C · 261 mm rain
- Muar in AprilMalaysia · 132 kmHigh 29.6°C · Low 24.9°C · 203 mm rain
- Cyberjaya in AprilMalaysia · 142 kmHigh 30.0°C · Low 23.6°C · 294 mm rain
- Puchong in AprilMalaysia · 149 kmHigh 30.2°C · Low 23.7°C · 188 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 Dumai) is explained once on the Dumai year overview and on the Sources, method and limits page.