Average annual temperature is 25.9 °C
Absolute maximum temperature: 32.5 °C
Absolute minimum temperature: 19.3 °C
Number of sunny days: 105 days
Number of rainy days: 260 days
Look at detailed online map of Siwalan
* Weather data for Siwalan 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) | 30.3 | 30.3 | 30.7 | 30.3 | 30.3 | 30.4 | 28.2 | 28.3 | 29.5 | 31.1 | 31.6 | 32.5 |
| Average daytime temperature (°C) | 28.7 | 28.9 | 29.2 | 29.2 | 29.1 | 28.7 | 27.2 | 27.6 | 28.3 | 30.0 | 30.6 | 30.5 |
| Average temperature (°C) | 26.0 | 25.9 | 26.2 | 26.4 | 26.3 | 25.9 | 24.5 | 24.1 | 24.6 | 26.3 | 27.2 | 27.2 |
| Average night temperature (°C) | 23.9 | 24.1 | 23.8 | 24.2 | 24.1 | 23.8 | 22.5 | 21.3 | 21.7 | 23.3 | 24.5 | 24.5 |
| Absolute minimum temperature (°C) | 23.2 | 23.1 | 22.7 | 23.3 | 22.4 | 22.5 | 20.2 | 19.3 | 20.0 | 22.0 | 23.6 | 22.9 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 12.0 | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 | 12.0 |
| Daylight mean duration (h) | 12.5 | 12.4 | 12.1 | 11.9 | 11.7 | 11.7 | 11.7 | 11.8 | 12.1 | 12.3 | 12.5 | 12.6 |
| Daylight minimum duration (h) | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 | 11.0 | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 |
| Sunshine mean duration (h) | 9.0 | 6.4 | 9.4 | 9.1 | 10.4 | 10.7 | 10.3 | 10.9 | 11.0 | 11.2 | 10.8 | 10.4 |
| Precipitation (mm) | 174 | 327 | 196 | 158 | 131 | 41 | 71 | 5 | 2 | 13 | 83 | 92 |
| Sunny days | 0 | 0 | 0 | 0 | 16 | 7 | 13 | 21 | 24 | 16 | 2 | 6 |
| Rainy days | 31 | 28 | 31 | 30 | 15 | 23 | 18 | 10 | 6 | 15 | 28 | 25 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Siwalan is at