Average annual temperature is 14.1 °C
Absolute maximum temperature: 34.1 °C
Absolute minimum temperature: -8.4 °C
Number of sunny days: 161 days
Number of rainy days: 200 days
Number of snow days: 4 days
Look at detailed online map of Isom
* Weather data for Isom United States is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 20.8 | 24.3 | 24.5 | 28.8 | 28.3 | 32.9 | 34.1 | 33.2 | 32.0 | 29.0 | 25.5 | 19.4 |
| Average daytime temperature (°C) | 11.5 | 14.0 | 14.2 | 20.7 | 22.8 | 26.4 | 30.7 | 28.2 | 25.6 | 20.6 | 14.8 | 11.4 |
| Average temperature (°C) | 5.8 | 7.7 | 7.9 | 13.7 | 16.7 | 20.5 | 24.4 | 22.8 | 19.9 | 15.0 | 8.2 | 6.1 |
| Average night temperature (°C) | 2.3 | 3.1 | 3.1 | 8.0 | 11.5 | 15.1 | 19.1 | 18.3 | 15.1 | 10.5 | 3.5 | 2.4 |
| Absolute minimum temperature (°C) | -7.4 | -8.4 | -8.1 | 0.7 | 3.7 | 9.3 | 14.8 | 11.8 | 10.6 | 1.5 | -6.6 | -5.3 |
| 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 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.9 | 10.8 | 12.0 | 13.2 | 14.2 | 14.7 | 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) | 4.8 | 6.8 | 7.7 | 9.6 | 10.1 | 11.3 | 11.8 | 9.9 | 10.0 | 7.6 | 7.4 | 5.3 |
| Precipitation (mm) | 93 | 103 | 69 | 77 | 106 | 50 | 110 | 116 | 60 | 41 | 55 | 77 |
| Sunny days | 9 | 13 | 16 | 19 | 13 | 12 | 7 | 8 | 15 | 16 | 19 | 14 |
| Rainy days | 20 | 15 | 14 | 11 | 18 | 18 | 24 | 23 | 15 | 15 | 10 | 17 |
| Snow days | 2 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 |
The best time to visit Isom during the most sunny months:
The largest precipitation sum in Isom is at