Climate averages 1991–2020
Dumai weather
in October.
A hot, very wet month: the 8th warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
October is a hot month in Dumai: daytime highs average 29.8°C and nights cool to about 23.6°C. By daytime temperature it is the 8th warmest of the 12 months.
Expect about 308 mm of rain on roughly 28 days, which makes October a very wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 05 min on an average October day.
The nearest other city in this atlas is Port Dickson (103 km away). In October its highs average 28.9°C, 0.9°C cooler than Dumai, with 236 mm of rain.
Among the 200 cities listed in Indonesia, Dumai ranks joint 114th of 200 for the warmest October highs and joint 175th of 200 for the driest October (rainfall, lowest first). The mean October high of those 200 cities is 30.1°C; Dumai is 0.3°C cooler than that mean.
From October to November, average highs fall by 0.8°C to 29.1°C, and monthly rainfall rises from 308 mm to 387 mm.
The annual picture
October 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 | 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, selected | 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
October in nearby cities
- Port Dickson in OctoberMalaysia · 103 kmHigh 28.9°C · Low 24.6°C · 236 mm rain
- Malacca in OctoberMalaysia · 106 kmHigh 28.7°C · Low 24.9°C · 221 mm rain
- Sepang in OctoberMalaysia · 119 kmHigh 28.8°C · Low 24.3°C · 235 mm rain
- Pekanbaru in OctoberIndonesia · 128 kmHigh 30.1°C · Low 23.1°C · 241 mm rain
- Seremban in OctoberMalaysia · 130 kmHigh 29.1°C · Low 23.6°C · 269 mm rain
- Muar in OctoberMalaysia · 132 kmHigh 28.8°C · Low 24.6°C · 220 mm rain
- Cyberjaya in OctoberMalaysia · 142 kmHigh 29.4°C · Low 23.3°C · 292 mm rain
- Puchong in OctoberMalaysia · 149 kmHigh 29.7°C · Low 23.4°C · 187 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.