Average annual temperature is 27.2 °C
Absolute maximum temperature: 38.9 °C
Absolute minimum temperature: 19.5 °C
Number of sunny days: 147 days
Number of rainy days: 218 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) | 31.7 | 30.3 | 31.7 | 33.0 | 33.5 | 34.8 | 33.8 | 35.1 | 36.6 | 38.9 | 38.4 | 37.0 |
| Average daytime temperature (°C) | 29.8 | 29.0 | 30.3 | 31.0 | 31.8 | 33.8 | 32.2 | 33.3 | 35.1 | 36.6 | 35.3 | 34.1 |
| Average temperature (°C) | 26.0 | 25.3 | 25.7 | 26.6 | 26.9 | 28.0 | 26.4 | 26.8 | 27.7 | 29.7 | 29.0 | 28.4 |
| Average night temperature (°C) | 23.4 | 23.2 | 22.7 | 23.3 | 22.7 | 23.3 | 21.7 | 21.7 | 22.3 | 24.4 | 24.8 | 24.4 |
| Absolute minimum temperature (°C) | 21.4 | 22.0 | 20.5 | 21.7 | 20.4 | 22.0 | 19.8 | 20.1 | 19.5 | 23.0 | 23.8 | 22.3 |
| 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 | 11.7 | 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 | 6.4 | 8.9 | 9.1 | 10.1 | 10.7 | 10.7 | 10.9 | 11.0 | 11.3 | 10.5 | 9.8 |
| Precipitation (mm) | 234 | 481 | 331 | 128 | 72 | 7 | 8 | 0 | 1 | 11 | 81 | 69 |
| Sunny days | 4 | 0 | 1 | 0 | 19 | 18 | 24 | 30 | 26 | 13 | 2 | 10 |
| Rainy days | 27 | 28 | 30 | 30 | 12 | 12 | 7 | 1 | 4 | 18 | 28 | 21 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Siwalan is at