Average annual temperature is 18.4 °C
Absolute maximum temperature: 41.0 °C
Absolute minimum temperature: -7.9 °C
Number of sunny days: 313 days
Number of rainy days: 47 days
Number of snow days: 5 days
Look at detailed online map of Semnan
* Weather data for Semnan 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) | 8.5 | 17.4 | 25.2 | 29.9 | 36.1 | 39.2 | 41.0 | 38.8 | 36.7 | 29.8 | 21.0 | 16.2 |
| Average daytime temperature (°C) | 5.4 | 10.3 | 19.4 | 24.6 | 29.9 | 35.3 | 37.4 | 35.2 | 31.0 | 24.2 | 16.7 | 11.7 |
| Average temperature (°C) | 1.9 | 5.3 | 14.1 | 19.0 | 24.2 | 29.4 | 31.6 | 29.2 | 25.7 | 19.1 | 12.5 | 7.9 |
| Average night temperature (°C) | -1.9 | 0.5 | 8.2 | 12.4 | 17.1 | 22.6 | 24.7 | 21.9 | 19.3 | 13.4 | 7.8 | 3.4 |
| Absolute minimum temperature (°C) | -7.9 | -5.7 | 4.1 | 2.4 | 8.6 | 16.4 | 21.4 | 17.3 | 12.8 | 10.7 | 2.1 | -0.1 |
| 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 | 9.0 |
| Daylight mean duration (h) | 10.1 | 10.9 | 12.0 | 13.1 | 14.0 | 14.5 | 14.3 | 13.5 | 12.4 | 11.3 | 10.3 | 9.8 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 7.9 | 8.6 | 8.9 | 11.0 | 12.0 | 12.6 | 12.9 | 12.2 | 11.0 | 9.9 | 9.0 | 8.2 |
| Precipitation (mm) | 8 | 14 | 39 | 4 | 4 | 1 | 0 | 0 | 2 | 18 | 6 | 1 |
| Sunny days | 25 | 19 | 21 | 26 | 26 | 27 | 31 | 30 | 29 | 25 | 26 | 28 |
| Rainy days | 4 | 6 | 10 | 4 | 5 | 3 | 0 | 1 | 1 | 6 | 4 | 3 |
| Snow days | 2 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Semnan during the most sunny months:
The largest precipitation sum in Semnan is at