Average annual temperature is 11.8 °C
Absolute maximum temperature: 28.1 °C
Absolute minimum temperature: -9.0 °C
Number of sunny days: 134 days
Number of rainy days: 224 days
Number of snow days: 7 days
Look at detailed online map of Gerdān Sū
* Weather data for Gerdān Sū 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) | 12.0 | 13.4 | 22.6 | 23.5 | 26.0 | 24.7 | 27.0 | 28.1 | 25.2 | 24.7 | 21.5 | 18.2 |
| Average daytime temperature (°C) | 2.9 | 5.4 | 12.6 | 15.1 | 17.2 | 20.5 | 22.1 | 24.1 | 18.4 | 16.9 | 15.9 | 11.3 |
| Average temperature (°C) | 0.1 | 1.6 | 8.7 | 11.5 | 14.1 | 17.5 | 19.4 | 20.7 | 16.1 | 13.4 | 11.3 | 6.9 |
| Average night temperature (°C) | -2.8 | -2.9 | 4.4 | 7.7 | 10.4 | 14.0 | 16.4 | 17.1 | 13.6 | 9.8 | 7.1 | 3.1 |
| Absolute minimum temperature (°C) | -6.1 | -9.0 | -1.1 | 0.3 | 3.8 | 11.0 | 13.6 | 14.7 | 10.9 | 8.1 | 1.6 | -2.3 |
| 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 | 12.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.9 | 10.8 | 12.0 | 13.2 | 14.2 | 14.7 | 14.4 | 13.6 | 12.4 | 11.2 | 10.2 | 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) | 5.4 | 7.8 | 7.5 | 9.9 | 9.0 | 10.2 | 8.3 | 10.2 | 6.1 | 7.5 | 7.7 | 6.9 |
| Precipitation (mm) | 153 | 139 | 133 | 106 | 238 | 134 | 251 | 135 | 317 | 194 | 115 | 157 |
| Sunny days | 6 | 14 | 9 | 13 | 9 | 8 | 13 | 17 | 4 | 12 | 15 | 14 |
| Rainy days | 19 | 13 | 22 | 17 | 22 | 22 | 18 | 14 | 26 | 19 | 15 | 17 |
| Snow days | 6 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Gerdān Sū during the most sunny months:
The largest precipitation sum in Gerdān Sū is at