Average annual temperature is 27.4 °C
Absolute maximum temperature: 36.0 °C
Absolute minimum temperature: 20.9 °C
Number of sunny days: 68 days
Number of rainy days: 297 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) | 31.8 | 29.8 | 31.3 | 32.0 | 33.1 | 33.3 | 32.4 | 33.3 | 34.8 | 36.0 | 35.6 | 33.8 |
| Average daytime temperature (°C) | 29.7 | 28.8 | 29.8 | 30.4 | 31.2 | 32.2 | 31.2 | 32.4 | 33.1 | 34.0 | 32.8 | 31.6 |
| Average temperature (°C) | 26.4 | 26.0 | 26.5 | 27.1 | 27.9 | 28.1 | 26.7 | 27.3 | 27.8 | 29.0 | 28.4 | 27.3 |
| Average night temperature (°C) | 24.1 | 24.1 | 24.0 | 24.8 | 24.8 | 24.6 | 22.6 | 22.7 | 22.8 | 24.5 | 24.7 | 24.4 |
| Absolute minimum temperature (°C) | 23.2 | 23.4 | 22.5 | 23.4 | 22.7 | 22.9 | 21.0 | 20.9 | 21.3 | 23.3 | 23.7 | 23.7 |
| 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 | 12.3 | 12.1 | 12.0 | 11.8 | 11.7 | 11.8 | 11.9 | 12.1 | 12.3 | 12.4 | 12.5 |
| 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) | 9.6 | 7.9 | 9.9 | 9.7 | 10.3 | 10.9 | 10.8 | 11.0 | 11.1 | 11.4 | 11.0 | 10.1 |
| Precipitation (mm) | 279 | 314 | 298 | 173 | 64 | 34 | 53 | 5 | 9 | 16 | 146 | 330 |
| Sunny days | 0 | 0 | 0 | 0 | 7 | 7 | 11 | 15 | 16 | 9 | 2 | 1 |
| Rainy days | 31 | 28 | 31 | 30 | 24 | 23 | 20 | 16 | 14 | 22 | 28 | 30 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Siwalan is at