Average annual temperature is 26.4 °C
Absolute maximum temperature: 34.1 °C
Absolute minimum temperature: 21.7 °C
Number of sunny days: 19 days
Number of rainy days: 346 days
Look at detailed online map of Kabupaten Siak
* Weather data for Kabupaten Siak 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) | 31.5 | 31.7 | 33.6 | 32.6 | 33.2 | 32.5 | 33.6 | 34.1 | 33.5 | 33.9 | 33.5 | 33.1 |
| Average daytime temperature (°C) | 29.4 | 30.3 | 29.9 | 31.1 | 31.6 | 31.3 | 31.2 | 31.1 | 31.8 | 31.9 | 31.7 | 29.9 |
| Average temperature (°C) | 25.3 | 25.9 | 25.8 | 26.5 | 27.1 | 26.9 | 26.8 | 26.3 | 26.8 | 26.6 | 26.5 | 25.9 |
| Average night temperature (°C) | 22.6 | 22.8 | 22.9 | 23.5 | 24.1 | 23.8 | 23.6 | 23.1 | 23.4 | 23.3 | 23.6 | 23.4 |
| Absolute minimum temperature (°C) | 21.7 | 21.9 | 21.8 | 22.5 | 22.9 | 22.8 | 22.8 | 22.3 | 22.4 | 22.0 | 22.6 | 22.5 |
| 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) | 12.1 | 12.1 | 12.1 | 12.1 | 12.2 | 12.2 | 12.2 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 |
| 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) | 7.4 | 9.0 | 8.4 | 8.4 | 9.0 | 9.5 | 8.6 | 8.8 | 9.4 | 9.0 | 8.0 | 7.2 |
| Precipitation (mm) | 236 | 235 | 255 | 282 | 333 | 191 | 157 | 244 | 180 | 319 | 342 | 482 |
| Sunny days | 0 | 3 | 2 | 0 | 2 | 4 | 3 | 1 | 4 | 0 | 0 | 0 |
| Rainy days | 31 | 25 | 29 | 30 | 29 | 26 | 28 | 30 | 26 | 31 | 30 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Kabupaten Siak is at