Average annual temperature is 26.2 °C
Absolute maximum temperature: 34.5 °C
Absolute minimum temperature: 21.0 °C
Number of sunny days: 20 days
Number of rainy days: 345 days
Look at detailed online map of Sungai Siak
* Weather data for Sungai 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) | 31.9 | 32.8 | 33.0 | 33.5 | 33.7 | 33.2 | 33.8 | 33.3 | 34.5 | 34.1 | 33.1 | 33.1 |
| Average daytime temperature (°C) | 30.2 | 31.1 | 30.6 | 31.4 | 31.8 | 31.6 | 31.1 | 30.9 | 32.2 | 31.9 | 31.2 | 30.3 |
| Average temperature (°C) | 25.3 | 25.7 | 25.7 | 26.2 | 26.8 | 26.7 | 26.5 | 26.1 | 26.9 | 26.5 | 26.0 | 25.6 |
| Average night temperature (°C) | 22.3 | 22.2 | 22.4 | 23.0 | 23.5 | 23.3 | 22.9 | 22.9 | 23.0 | 23.0 | 23.1 | 22.9 |
| Absolute minimum temperature (°C) | 21.5 | 21.0 | 21.5 | 22.0 | 21.6 | 22.0 | 21.5 | 22.1 | 21.6 | 21.9 | 22.5 | 22.1 |
| 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) | 7.9 | 8.9 | 8.9 | 8.8 | 9.3 | 9.2 | 9.0 | 8.6 | 9.4 | 8.9 | 8.2 | 7.5 |
| Precipitation (mm) | 199 | 263 | 233 | 259 | 301 | 209 | 143 | 262 | 155 | 340 | 364 | 549 |
| Sunny days | 1 | 2 | 0 | 0 | 2 | 3 | 5 | 1 | 6 | 0 | 0 | 0 |
| Rainy days | 30 | 26 | 31 | 30 | 29 | 27 | 26 | 30 | 24 | 31 | 30 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Sungai Siak is at