Average annual temperature is 18.6 °C
Absolute maximum temperature: 42.1 °C
Absolute minimum temperature: -22.9 °C
Number of sunny days: 290 days
Number of rainy days: 70 days
Number of snow days: 5 days
Look at detailed online map of Sum Sāy
* Weather data for Sum Sāy Afghanistan is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 17.7 | 20.0 | 27.3 | 34.6 | 35.1 | 42.1 | 40.8 | 38.1 | 38.9 | 32.7 | 28.2 | 23.1 |
| Average daytime temperature (°C) | 3.6 | 12.2 | 21.8 | 24.9 | 29.1 | 36.2 | 36.8 | 33.6 | 27.8 | 23.8 | 20.1 | 13.5 |
| Average temperature (°C) | 0.0 | 8.3 | 16.7 | 19.4 | 23.6 | 30.8 | 31.4 | 28.4 | 22.4 | 18.4 | 14.8 | 8.7 |
| Average night temperature (°C) | -4.4 | 4.6 | 11.9 | 13.2 | 17.5 | 24.8 | 25.9 | 23.1 | 16.8 | 12.9 | 10.1 | 4.1 |
| Absolute minimum temperature (°C) | -22.9 | -5.8 | 5.2 | 4.7 | 9.1 | 22.5 | 23.1 | 17.4 | 13.4 | 6.5 | 5.1 | -1.9 |
| 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 | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 10.0 | 10.9 | 12.0 | 13.1 | 14.1 | 14.6 | 14.4 | 13.5 | 12.4 | 11.3 | 10.3 | 9.7 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 12.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 7.5 | 5.1 | 9.3 | 10.5 | 11.9 | 12.9 | 13.0 | 12.3 | 11.1 | 9.5 | 7.9 | 7.4 |
| Precipitation (mm) | 13 | 84 | 27 | 34 | 16 | 0 | 0 | 1 | 0 | 10 | 47 | 18 |
| Sunny days | 25 | 11 | 16 | 22 | 24 | 30 | 31 | 30 | 30 | 24 | 22 | 25 |
| Rainy days | 3 | 15 | 15 | 8 | 7 | 0 | 0 | 1 | 0 | 7 | 8 | 6 |
| Snow days | 3 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Sum Sāy during the most sunny months:
The largest precipitation sum in Sum Sāy is at