Average annual temperature is 25.9 °C
Absolute maximum temperature: 44.2 °C
Absolute minimum temperature: 5.7 °C
Number of sunny days: 218 days
Number of rainy days: 147 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) | 27.8 | 32.4 | 35.7 | 43.4 | 43.9 | 44.2 | 36.7 | 34.3 | 35.3 | 33.8 | 30.9 | 27.9 |
| Average daytime temperature (°C) | 22.3 | 27.9 | 31.8 | 37.6 | 38.7 | 40.3 | 34.7 | 32.7 | 32.0 | 30.6 | 28.4 | 23.5 |
| Average temperature (°C) | 15.3 | 20.3 | 24.8 | 30.3 | 31.8 | 34.7 | 30.8 | 29.2 | 28.4 | 25.5 | 22.3 | 17.3 |
| Average night temperature (°C) | 9.6 | 13.2 | 18.3 | 22.9 | 25.0 | 29.3 | 27.4 | 26.3 | 25.7 | 20.9 | 16.8 | 12.5 |
| Absolute minimum temperature (°C) | 5.7 | 10.2 | 15.9 | 18.7 | 21.4 | 25.8 | 25.5 | 25.0 | 23.8 | 17.0 | 12.4 | 8.7 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 11.0 | 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) | 10.8 | 11.3 | 12.0 | 12.8 | 13.4 | 13.7 | 13.5 | 13.0 | 12.3 | 11.6 | 10.9 | 10.6 |
| Daylight minimum duration (h) | 10.0 | 11.0 | 11.0 | 12.0 | 13.0 | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 | 10.0 |
| Sunshine mean duration (h) | 9.0 | 10.4 | 9.8 | 10.1 | 10.6 | 11.1 | 9.9 | 8.4 | 8.6 | 9.2 | 9.3 | 7.7 |
| Precipitation (mm) | 5 | 0 | 60 | 7 | 27 | 98 | 259 | 201 | 230 | 137 | 19 | 32 |
| Sunny days | 28 | 28 | 22 | 22 | 23 | 17 | 2 | 2 | 1 | 23 | 23 | 27 |
| Rainy days | 3 | 0 | 9 | 8 | 8 | 13 | 29 | 29 | 29 | 8 | 7 | 4 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Siwān is at