Average annual temperature is 27.1 °C
Absolute maximum temperature: 39.7 °C
Absolute minimum temperature: 18.2 °C
Number of sunny days: 155 days
Number of rainy days: 210 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) | 32.1 | 31.3 | 32.1 | 32.5 | 32.9 | 34.8 | 33.4 | 34.9 | 36.1 | 39.7 | 38.1 | 38.6 |
| Average daytime temperature (°C) | 30.3 | 29.7 | 30.7 | 30.6 | 31.4 | 33.3 | 32.6 | 33.6 | 34.6 | 36.6 | 35.9 | 35.0 |
| Average temperature (°C) | 25.7 | 25.3 | 25.8 | 26.0 | 26.7 | 27.8 | 26.8 | 26.7 | 27.5 | 29.5 | 29.2 | 28.6 |
| Average night temperature (°C) | 22.7 | 22.9 | 22.5 | 23.0 | 22.7 | 23.2 | 21.8 | 21.0 | 21.8 | 23.7 | 24.5 | 24.3 |
| Absolute minimum temperature (°C) | 21.5 | 22.1 | 21.1 | 21.9 | 21.3 | 21.8 | 18.2 | 18.9 | 19.7 | 22.3 | 22.6 | 23.0 |
| 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 | 12.5 | 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) | 8.4 | 6.1 | 8.7 | 8.8 | 10.1 | 10.9 | 10.8 | 10.9 | 11.1 | 11.4 | 10.6 | 10.0 |
| Precipitation (mm) | 210 | 411 | 289 | 188 | 67 | 17 | 11 | 0 | 0 | 4 | 109 | 94 |
| Sunny days | 3 | 1 | 0 | 2 | 21 | 17 | 23 | 28 | 28 | 18 | 6 | 8 |
| Rainy days | 28 | 27 | 31 | 28 | 10 | 13 | 8 | 3 | 2 | 13 | 24 | 23 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Siwalan is at