Average annual temperature is 12.8 °C
Absolute maximum temperature: 35.7 °C
Absolute minimum temperature: -15.3 °C
Number of sunny days: 267 days
Number of rainy days: 79 days
Number of snow days: 19 days
Look at detailed online map of Sīāvashān
* Weather data for Sīāvashān 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) | 4.7 | 10.2 | 17.3 | 22.6 | 29.8 | 33.4 | 35.7 | 34.2 | 31.6 | 23.9 | 17.1 | 12.8 |
| Average daytime temperature (°C) | 0.2 | 2.2 | 12.8 | 17.7 | 23.5 | 29.1 | 31.2 | 30.0 | 26.1 | 19.5 | 12.8 | 9.6 |
| Average temperature (°C) | -3.8 | -2.0 | 7.3 | 11.7 | 17.1 | 22.9 | 26.0 | 24.8 | 20.9 | 14.1 | 8.2 | 4.8 |
| Average night temperature (°C) | -7.7 | -6.3 | 2.3 | 5.9 | 10.4 | 16.6 | 20.8 | 19.3 | 15.8 | 9.1 | 3.9 | 0.7 |
| Absolute minimum temperature (°C) | -12.5 | -15.3 | -2.8 | -3.2 | 3.4 | 10.3 | 17.8 | 15.4 | 11.4 | 6.0 | -2.7 | -3.0 |
| 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) | 10.1 | 10.9 | 12.0 | 13.1 | 14.0 | 14.4 | 14.2 | 13.4 | 12.4 | 11.3 | 10.4 | 9.9 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 | 9.0 |
| Sunshine mean duration (h) | 7.5 | 9.2 | 9.2 | 11.1 | 12.2 | 12.7 | 12.8 | 11.9 | 11.0 | 9.7 | 8.7 | 8.2 |
| Precipitation (mm) | 56 | 36 | 61 | 24 | 26 | 15 | 0 | 0 | 0 | 28 | 30 | 9 |
| Sunny days | 20 | 15 | 14 | 20 | 18 | 23 | 31 | 30 | 30 | 20 | 22 | 24 |
| Rainy days | 2 | 5 | 17 | 10 | 13 | 7 | 0 | 1 | 0 | 11 | 8 | 5 |
| Snow days | 9 | 8 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 |
The largest precipitation sum in Sīāvashān is at