Average annual temperature is 27.6 °C
Absolute maximum temperature: 38.4 °C
Absolute minimum temperature: 20.6 °C
Number of sunny days: 123 days
Number of rainy days: 242 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) | 32.0 | 31.1 | 31.9 | 32.5 | 33.1 | 34.4 | 33.6 | 35.7 | 37.0 | 38.4 | 38.0 | 37.1 |
| Average daytime temperature (°C) | 30.6 | 29.7 | 30.9 | 31.2 | 31.4 | 33.4 | 32.8 | 34.3 | 35.7 | 37.2 | 35.7 | 33.6 |
| Average temperature (°C) | 26.1 | 25.8 | 26.2 | 26.6 | 27.1 | 28.1 | 27.3 | 27.7 | 28.5 | 30.1 | 29.1 | 28.0 |
| Average night temperature (°C) | 23.4 | 23.6 | 23.3 | 23.8 | 23.4 | 23.7 | 22.6 | 22.6 | 23.0 | 24.6 | 24.9 | 24.3 |
| Absolute minimum temperature (°C) | 22.1 | 22.9 | 22.1 | 22.6 | 21.7 | 22.7 | 20.6 | 20.8 | 21.6 | 22.9 | 23.2 | 22.7 |
| 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 | 11.9 | 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) | 8.5 | 6.0 | 8.7 | 9.0 | 10.2 | 10.8 | 10.6 | 10.9 | 11.0 | 11.4 | 10.6 | 9.5 |
| Precipitation (mm) | 230 | 358 | 367 | 242 | 103 | 24 | 19 | 3 | 5 | 15 | 146 | 207 |
| Sunny days | 0 | 0 | 0 | 0 | 16 | 8 | 21 | 26 | 26 | 15 | 4 | 7 |
| Rainy days | 31 | 28 | 31 | 30 | 15 | 22 | 10 | 5 | 4 | 16 | 26 | 24 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Siwalan is at