Average annual temperature is 9.8 °C
Absolute maximum temperature: 34.3 °C
Absolute minimum temperature: -21.7 °C
Number of sunny days: 226 days
Number of rainy days: 122 days
Number of snow days: 17 days
Look at detailed online map of Sīāvān
* Weather data for Sīāvān 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) | 5.2 | 9.9 | 15.3 | 19.0 | 24.4 | 32.4 | 34.3 | 34.1 | 32.7 | 21.8 | 18.0 | 11.3 |
| Average daytime temperature (°C) | 0.8 | -0.4 | 10.4 | 14.6 | 19.5 | 25.9 | 28.7 | 30.0 | 24.0 | 17.5 | 12.9 | 7.0 |
| Average temperature (°C) | -3.2 | -6.5 | 4.5 | 8.2 | 12.9 | 19.2 | 22.4 | 23.6 | 17.6 | 10.6 | 6.0 | 1.3 |
| Average night temperature (°C) | -7.1 | -12.8 | -1.1 | 1.8 | 6.1 | 12.1 | 16.1 | 16.6 | 11.6 | 4.6 | 0.6 | -3.3 |
| Absolute minimum temperature (°C) | -15.9 | -21.7 | -5.8 | -4.2 | -1.0 | 9.4 | 11.8 | 12.6 | 7.9 | 1.6 | -4.8 | -7.9 |
| 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 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.9 | 10.8 | 12.0 | 13.2 | 14.2 | 14.8 | 14.5 | 13.6 | 12.4 | 11.2 | 10.1 | 9.6 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 8.3 | 8.8 | 8.7 | 10.5 | 11.6 | 13.4 | 13.4 | 12.3 | 11.3 | 10.0 | 8.4 | 7.5 |
| Precipitation (mm) | 16 | 26 | 80 | 60 | 57 | 14 | 1 | 1 | 9 | 19 | 25 | 27 |
| Sunny days | 25 | 20 | 13 | 9 | 5 | 17 | 28 | 29 | 21 | 19 | 19 | 21 |
| Rainy days | 2 | 1 | 17 | 20 | 26 | 13 | 3 | 2 | 9 | 12 | 10 | 7 |
| Snow days | 4 | 7 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 3 |
The best time to visit Sīāvān during the most sunny months:
The largest precipitation sum in Sīāvān is at