Average annual temperature is 26.9 °C
Absolute maximum temperature: 34.4 °C
Absolute minimum temperature: 22.2 °C
Number of sunny days: 24 days
Number of rainy days: 341 days
Look at detailed online map of Dumai
* Weather data for Dumai Indonesia is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 31.3 | 31.2 | 32.6 | 33.0 | 33.7 | 33.5 | 34.1 | 33.7 | 34.4 | 34.4 | 32.2 | 31.5 |
| Average daytime temperature (°C) | 28.8 | 30.0 | 30.0 | 31.1 | 31.9 | 32.0 | 31.3 | 31.3 | 32.0 | 31.7 | 30.9 | 29.7 |
| Average temperature (°C) | 25.7 | 26.3 | 26.5 | 27.1 | 27.8 | 27.6 | 27.3 | 26.8 | 27.3 | 27.0 | 26.8 | 26.2 |
| Average night temperature (°C) | 23.2 | 23.6 | 23.7 | 24.2 | 24.6 | 24.4 | 24.3 | 23.7 | 24.0 | 23.8 | 24.0 | 23.8 |
| Absolute minimum temperature (°C) | 22.3 | 22.9 | 22.2 | 23.3 | 23.4 | 23.1 | 23.5 | 23.1 | 22.9 | 22.9 | 23.0 | 23.2 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 |
| Daylight mean duration (h) | 12.0 | 12.1 | 12.1 | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.1 | 12.1 | 12.0 | 12.0 |
| Daylight minimum duration (h) | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 |
| Sunshine mean duration (h) | 7.6 | 9.6 | 9.0 | 8.8 | 10.2 | 9.7 | 8.6 | 8.3 | 9.4 | 8.6 | 8.7 | 7.8 |
| Precipitation (mm) | 277 | 195 | 154 | 194 | 177 | 230 | 184 | 271 | 214 | 400 | 236 | 414 |
| Sunny days | 0 | 3 | 5 | 0 | 3 | 4 | 6 | 0 | 2 | 0 | 0 | 1 |
| Rainy days | 31 | 25 | 26 | 30 | 28 | 26 | 25 | 31 | 28 | 31 | 30 | 30 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Dumai is at