Average annual temperature is 16.9 °C
Absolute maximum temperature: 40.7 °C
Absolute minimum temperature: -11.7 °C
Number of sunny days: 300 days
Number of rainy days: 59 days
Number of snow days: 6 days
Look at detailed online map of Rīākhūn
* Weather data for Rīākhūn 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) | 12.7 | 17.1 | 23.7 | 27.6 | 35.3 | 39.8 | 40.7 | 39.1 | 37.5 | 31.7 | 22.2 | 18.0 |
| Average daytime temperature (°C) | 5.8 | 11.4 | 19.4 | 23.9 | 30.1 | 36.1 | 38.8 | 35.4 | 33.0 | 26.8 | 18.7 | 14.6 |
| Average temperature (°C) | -0.4 | 3.9 | 11.5 | 16.5 | 22.4 | 28.4 | 31.1 | 28.1 | 25.1 | 18.3 | 10.6 | 6.0 |
| Average night temperature (°C) | -5.6 | -2.6 | 3.4 | 7.7 | 13.3 | 19.5 | 22.0 | 19.1 | 16.1 | 9.4 | 3.0 | -1.9 |
| Absolute minimum temperature (°C) | -11.7 | -6.7 | -0.4 | -0.3 | 6.2 | 14.3 | 19.8 | 13.0 | 10.8 | 5.2 | -2.2 | -4.0 |
| 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) | 10.3 | 11.0 | 12.0 | 13.0 | 13.8 | 14.3 | 14.1 | 13.3 | 12.4 | 11.4 | 10.5 | 10.0 |
| 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) | 7.2 | 8.4 | 9.5 | 10.7 | 12.0 | 12.6 | 12.4 | 11.8 | 10.9 | 9.9 | 8.9 | 8.6 |
| Precipitation (mm) | 41 | 68 | 12 | 2 | 3 | 1 | 0 | 0 | 0 | 13 | 16 | 7 |
| Sunny days | 19 | 16 | 19 | 25 | 26 | 28 | 31 | 30 | 30 | 25 | 23 | 28 |
| Rainy days | 6 | 12 | 12 | 5 | 5 | 2 | 0 | 1 | 0 | 6 | 7 | 3 |
| Snow days | 6 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Rīākhūn is at