Average annual temperature is 25.3 °C
Absolute maximum temperature: 43.5 °C
Absolute minimum temperature: 5.5 °C
Number of sunny days: 222 days
Number of rainy days: 143 days
Look at detailed online map of Siwān
* Weather data for Siwān 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) | 25.6 | 31.1 | 34.6 | 42.5 | 39.5 | 43.5 | 35.9 | 34.5 | 35.1 | 33.0 | 31.1 | 28.6 |
| Average daytime temperature (°C) | 20.8 | 26.5 | 30.6 | 36.6 | 35.8 | 39.4 | 33.5 | 32.4 | 32.2 | 30.9 | 28.2 | 24.4 |
| Average temperature (°C) | 14.2 | 19.6 | 23.9 | 29.7 | 29.8 | 33.7 | 29.9 | 29.0 | 28.6 | 25.6 | 22.1 | 17.6 |
| Average night temperature (°C) | 9.0 | 13.0 | 17.6 | 22.7 | 23.9 | 28.0 | 26.9 | 26.1 | 25.6 | 21.1 | 16.6 | 12.2 |
| Absolute minimum temperature (°C) | 5.5 | 9.1 | 15.7 | 17.7 | 21.1 | 24.8 | 25.2 | 24.5 | 23.5 | 17.5 | 13.0 | 8.1 |
| 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 | 13.7 | 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 | 9.8 | 10.1 | 10.8 | 10.6 | 8.8 | 8.0 | 8.5 | 9.4 | 9.2 | 8.5 |
| Precipitation (mm) | 0 | 0 | 46 | 4 | 19 | 118 | 266 | 325 | 169 | 74 | 0 | 5 |
| Sunny days | 29 | 28 | 22 | 24 | 23 | 16 | 3 | 2 | 0 | 19 | 29 | 27 |
| Rainy days | 2 | 0 | 9 | 6 | 8 | 14 | 28 | 29 | 30 | 12 | 1 | 4 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Siwān is at