Average annual temperature is 17.9 °C
Absolute maximum temperature: 40.1 °C
Absolute minimum temperature: -7.1 °C
Number of sunny days: 314 days
Number of rainy days: 50 days
Number of snow days: 1 day
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) | 11.5 | 16.8 | 24.6 | 28.8 | 35.0 | 39.8 | 40.1 | 38.5 | 36.8 | 32.3 | 21.5 | 16.3 |
| Average daytime temperature (°C) | 6.0 | 11.8 | 19.3 | 24.2 | 30.2 | 35.8 | 38.2 | 35.4 | 32.9 | 26.6 | 17.9 | 13.5 |
| Average temperature (°C) | 0.9 | 5.1 | 12.7 | 17.8 | 23.5 | 29.5 | 32.0 | 29.0 | 26.1 | 19.6 | 11.6 | 6.8 |
| Average night temperature (°C) | -3.6 | -1.1 | 5.6 | 10.1 | 15.7 | 21.5 | 24.3 | 21.1 | 18.6 | 12.4 | 5.6 | 0.2 |
| Absolute minimum temperature (°C) | -7.1 | -5.4 | 1.3 | 2.5 | 9.1 | 16.7 | 21.8 | 15.4 | 13.8 | 8.4 | -1.0 | -2.6 |
| 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) | 7.6 | 8.3 | 9.5 | 10.8 | 12.0 | 12.8 | 12.6 | 11.9 | 11.0 | 9.9 | 8.9 | 8.8 |
| Precipitation (mm) | 32 | 24 | 13 | 3 | 1 | 0 | 0 | 0 | 0 | 4 | 8 | 2 |
| Sunny days | 23 | 20 | 20 | 24 | 28 | 29 | 31 | 29 | 30 | 28 | 24 | 28 |
| Rainy days | 7 | 8 | 11 | 6 | 3 | 1 | 0 | 2 | 0 | 3 | 6 | 3 |
| Snow days | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Sīān is at