Average annual temperature is 27.2 °C
Absolute maximum temperature: 36.5 °C
Absolute minimum temperature: 18.5 °C
Number of sunny days: 97 days
Number of rainy days: 268 days
Look at detailed online map of Siwen
* Weather data for Siwen 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) | 32.5 | 30.7 | 31.8 | 32.6 | 34.3 | 34.7 | 34.7 | 34.1 | 35.5 | 36.0 | 36.5 | 35.4 |
| Average daytime temperature (°C) | 30.1 | 28.8 | 30.1 | 31.4 | 32.5 | 33.1 | 33.1 | 33.0 | 33.9 | 34.5 | 33.9 | 33.1 |
| Average temperature (°C) | 25.7 | 25.3 | 25.9 | 26.7 | 27.5 | 27.9 | 27.3 | 27.0 | 27.8 | 29.1 | 28.4 | 27.9 |
| Average night temperature (°C) | 22.8 | 22.9 | 22.7 | 23.2 | 23.3 | 23.3 | 22.0 | 21.2 | 21.9 | 23.9 | 24.1 | 23.7 |
| Absolute minimum temperature (°C) | 21.7 | 21.7 | 21.5 | 22.3 | 21.7 | 22.0 | 19.7 | 18.5 | 19.8 | 22.0 | 22.9 | 21.9 |
| 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) | 9.1 | 5.9 | 9.8 | 10.1 | 10.4 | 10.6 | 10.6 | 11.0 | 11.1 | 11.1 | 10.6 | 10.5 |
| Precipitation (mm) | 201 | 436 | 260 | 117 | 119 | 62 | 30 | 6 | 5 | 28 | 178 | 131 |
| Sunny days | 0 | 1 | 0 | 2 | 7 | 5 | 17 | 23 | 22 | 11 | 3 | 6 |
| Rainy days | 31 | 27 | 31 | 28 | 24 | 25 | 14 | 8 | 8 | 20 | 27 | 25 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Siwen is at