Average annual temperature is 25.3 °C
Absolute maximum temperature: 43.4 °C
Absolute minimum temperature: 5.6 °C
Number of sunny days: 226 days
Number of rainy days: 139 days
Look at detailed online map of Siwan
* Weather data for Siwan India is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 25.5 | 31.0 | 34.7 | 42.9 | 39.6 | 43.4 | 36.0 | 34.6 | 35.4 | 32.7 | 31.3 | 28.9 |
| Average daytime temperature (°C) | 20.9 | 26.5 | 30.6 | 36.7 | 35.8 | 39.3 | 33.6 | 32.5 | 32.2 | 30.9 | 28.5 | 24.7 |
| Average temperature (°C) | 14.2 | 19.5 | 23.9 | 29.7 | 29.7 | 33.6 | 29.9 | 29.0 | 28.6 | 25.6 | 22.1 | 17.8 |
| Average night temperature (°C) | 9.0 | 13.0 | 17.5 | 22.5 | 24.0 | 28.0 | 26.9 | 26.2 | 25.6 | 21.0 | 16.5 | 12.3 |
| Absolute minimum temperature (°C) | 5.6 | 9.4 | 15.7 | 17.3 | 21.1 | 25.0 | 25.3 | 24.6 | 23.5 | 17.2 | 12.9 | 8.5 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 | 13.0 | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 |
| Daylight mean duration (h) | 10.7 | 11.3 | 12.0 | 12.8 | 13.4 | 13.8 | 13.6 | 13.0 | 12.3 | 11.5 | 10.9 | 10.5 |
| Daylight minimum duration (h) | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 | 10.0 |
| Sunshine mean duration (h) | 8.3 | 10.1 | 9.9 | 10.1 | 10.8 | 10.7 | 8.8 | 8.1 | 8.7 | 9.4 | 9.2 | 8.5 |
| Precipitation (mm) | 0 | 0 | 41 | 6 | 23 | 124 | 312 | 358 | 200 | 100 | 0 | 5 |
| Sunny days | 31 | 28 | 22 | 26 | 22 | 16 | 2 | 3 | 0 | 19 | 29 | 28 |
| Rainy days | 0 | 0 | 9 | 4 | 9 | 14 | 29 | 28 | 30 | 12 | 1 | 3 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Siwan is at