Average annual temperature is 12.1 °C
Absolute maximum temperature: 32.7 °C
Absolute minimum temperature: -17.3 °C
Number of sunny days: 195 days
Number of rainy days: 156 days
Number of snow days: 14 days
Look at detailed online map of Siŏm
* Weather data for Siŏm North Korea is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 9.6 | 10.2 | 21.3 | 23.6 | 27.6 | 31.9 | 31.8 | 32.7 | 30.3 | 22.4 | 23.0 | 14.8 |
| Average daytime temperature (°C) | 0.3 | 4.9 | 12.3 | 16.6 | 22.6 | 26.4 | 29.1 | 28.9 | 26.2 | 19.0 | 8.6 | 2.5 |
| Average temperature (°C) | -3.7 | -0.1 | 6.6 | 11.5 | 17.5 | 21.6 | 25.3 | 25.4 | 21.9 | 14.7 | 4.6 | -1.0 |
| Average night temperature (°C) | -7.7 | -3.6 | 2.1 | 7.3 | 13.1 | 17.6 | 22.4 | 22.4 | 18.3 | 11.0 | 0.9 | -4.5 |
| Absolute minimum temperature (°C) | -17.3 | -6.7 | -3.8 | 2.7 | 7.7 | 13.4 | 20.1 | 17.0 | 13.1 | 6.1 | -7.1 | -15.0 |
| 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 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.8 | 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) | 7.1 | 8.4 | 9.1 | 7.7 | 8.8 | 9.5 | 8.5 | 8.0 | 8.5 | 8.6 | 6.3 | 5.1 |
| Precipitation (mm) | 28 | 4 | 33 | 86 | 103 | 147 | 236 | 230 | 57 | 29 | 93 | 87 |
| Sunny days | 21 | 27 | 26 | 15 | 19 | 9 | 11 | 7 | 13 | 18 | 14 | 15 |
| Rainy days | 6 | 1 | 5 | 15 | 12 | 21 | 20 | 24 | 17 | 13 | 13 | 9 |
| Snow days | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 7 |
The largest precipitation sum in Siŏm is at