Average annual temperature is 9.1 °C
Absolute maximum temperature: 37.5 °C
Absolute minimum temperature: -25.3 °C
Number of sunny days: 220 days
Number of rainy days: 116 days
Number of snow days: 29 days
Look at detailed online map of McCook County
* Weather data for McCook County 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) | 1.8 | 3.7 | 8.3 | 27.1 | 31.5 | 34.9 | 35.1 | 37.5 | 36.3 | 31.2 | 17.5 | 10.5 |
| Average daytime temperature (°C) | -5.0 | -2.4 | 0.9 | 14.1 | 24.4 | 29.3 | 28.1 | 29.3 | 26.0 | 15.3 | 9.1 | 4.3 |
| Average temperature (°C) | -8.1 | -7.3 | -4.1 | 7.4 | 17.9 | 23.4 | 22.4 | 23.2 | 20.2 | 10.3 | 3.6 | -0.2 |
| Average night temperature (°C) | -11.0 | -11.1 | -7.6 | 2.1 | 12.0 | 17.8 | 17.1 | 18.3 | 15.4 | 6.3 | -0.6 | -3.3 |
| Absolute minimum temperature (°C) | -25.0 | -25.3 | -16.0 | -7.6 | 1.1 | 11.0 | 11.9 | 12.9 | 9.3 | -7.9 | -9.5 | -8.3 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.4 | 10.5 | 11.9 | 13.4 | 14.7 | 15.4 | 15.1 | 13.9 | 12.5 | 11.0 | 9.7 | 9.0 |
| Daylight minimum duration (h) | 8.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 8.0 |
| Sunshine mean duration (h) | 3.7 | 7.2 | 7.2 | 9.3 | 11.7 | 12.8 | 12.8 | 11.5 | 9.9 | 7.3 | 7.2 | 5.4 |
| Precipitation (mm) | 49 | 32 | 32 | 29 | 50 | 47 | 38 | 106 | 65 | 89 | 3 | 46 |
| Sunny days | 20 | 21 | 17 | 17 | 19 | 11 | 17 | 19 | 16 | 16 | 25 | 22 |
| Rainy days | 3 | 2 | 6 | 11 | 12 | 19 | 14 | 12 | 14 | 14 | 3 | 6 |
| Snow days | 8 | 5 | 8 | 2 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 3 |
The best time to visit McCook County during the most sunny months:
Months with the longest average daylight duration in McCook County:
The largest precipitation sum in McCook County is at