Average annual temperature is 18.2 °C
Absolute maximum temperature: 40.9 °C
Absolute minimum temperature: -8.7 °C
Number of sunny days: 308 days
Number of rainy days: 54 days
Number of snow days: 3 days
Look at detailed online map of Sīān
* Weather data for Sīān Iran is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 11.8 | 17.1 | 23.2 | 28.5 | 34.7 | 40.9 | 40.3 | 37.7 | 37.3 | 32.0 | 21.1 | 17.2 |
| Average daytime temperature (°C) | 5.2 | 11.7 | 19.2 | 24.0 | 29.9 | 35.9 | 38.1 | 34.9 | 32.7 | 26.6 | 17.7 | 13.7 |
| Average temperature (°C) | 0.9 | 5.9 | 13.0 | 17.8 | 23.6 | 29.6 | 31.7 | 28.8 | 26.1 | 19.9 | 12.3 | 7.9 |
| Average night temperature (°C) | -3.6 | 0.2 | 5.9 | 10.2 | 15.8 | 22.0 | 23.8 | 21.5 | 18.7 | 12.8 | 6.2 | 2.0 |
| Absolute minimum temperature (°C) | -8.7 | -5.1 | 1.9 | 2.2 | 9.7 | 16.4 | 21.0 | 16.2 | 13.5 | 9.0 | 0.1 | -2.1 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 |
| Daylight mean duration (h) | 10.3 | 11.0 | 12.0 | 13.0 | 13.8 | 14.2 | 14.0 | 13.3 | 12.4 | 11.4 | 10.5 | 10.1 |
| Daylight minimum duration (h) | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 | 10.0 |
| Sunshine mean duration (h) | 7.5 | 8.4 | 9.5 | 10.8 | 12.0 | 12.8 | 12.6 | 11.9 | 11.0 | 9.9 | 8.9 | 8.7 |
| Precipitation (mm) | 35 | 46 | 13 | 4 | 1 | 4 | 0 | 0 | 0 | 5 | 17 | 3 |
| Sunny days | 22 | 19 | 20 | 23 | 26 | 28 | 31 | 31 | 30 | 28 | 22 | 28 |
| Rainy days | 6 | 9 | 11 | 7 | 5 | 2 | 0 | 0 | 0 | 3 | 8 | 3 |
| Snow days | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Sīān is at