Average annual temperature is 26.7 °C
Absolute maximum temperature: 37.7 °C
Absolute minimum temperature: 19.0 °C
Number of sunny days: 125 days
Number of rainy days: 240 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) | 31.1 | 29.6 | 30.8 | 31.8 | 31.8 | 33.5 | 32.9 | 33.7 | 36.4 | 37.7 | 36.4 | 35.1 |
| Average daytime temperature (°C) | 29.1 | 28.2 | 29.5 | 30.2 | 30.3 | 32.2 | 31.1 | 32.2 | 34.1 | 35.6 | 33.4 | 32.1 |
| Average temperature (°C) | 25.9 | 25.2 | 25.6 | 26.3 | 26.3 | 27.1 | 25.9 | 26.3 | 27.3 | 29.1 | 28.0 | 27.5 |
| Average night temperature (°C) | 23.6 | 23.4 | 22.8 | 23.5 | 22.4 | 22.9 | 21.4 | 21.4 | 21.9 | 23.9 | 24.2 | 24.1 |
| Absolute minimum temperature (°C) | 21.7 | 22.0 | 21.1 | 22.2 | 20.7 | 21.4 | 19.4 | 19.0 | 19.1 | 21.9 | 23.1 | 22.5 |
| 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 | 12.5 |
| 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) | 8.4 | 6.0 | 8.7 | 9.1 | 10.0 | 10.6 | 10.6 | 10.9 | 11.0 | 11.3 | 10.3 | 9.6 |
| Precipitation (mm) | 253 | 544 | 401 | 145 | 72 | 27 | 48 | 0 | 4 | 14 | 158 | 217 |
| Sunny days | 2 | 0 | 0 | 1 | 13 | 14 | 21 | 28 | 25 | 10 | 2 | 9 |
| Rainy days | 29 | 28 | 31 | 29 | 18 | 16 | 10 | 3 | 5 | 21 | 28 | 22 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Siwalan is at