Average annual temperature is 10.9 °C
Absolute maximum temperature: 37.9 °C
Absolute minimum temperature: -28.0 °C
Number of sunny days: 207 days
Number of rainy days: 135 days
Number of snow days: 23 days
Look at detailed online map of Black Hawk County
* Weather data for Black Hawk 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) | 8.6 | 10.4 | 22.6 | 25.8 | 30.9 | 31.9 | 34.0 | 37.9 | 34.8 | 31.5 | 17.7 | 13.2 |
| Average daytime temperature (°C) | 0.2 | 3.2 | 6.9 | 16.0 | 24.2 | 28.6 | 28.5 | 28.5 | 26.5 | 17.2 | 9.7 | 6.0 |
| Average temperature (°C) | -3.9 | -2.6 | 1.3 | 9.4 | 17.4 | 22.6 | 23.0 | 23.3 | 20.5 | 12.4 | 4.6 | 1.6 |
| Average night temperature (°C) | -7.0 | -7.1 | -3.0 | 4.3 | 11.2 | 16.8 | 17.5 | 18.5 | 15.5 | 8.4 | 0.5 | -1.3 |
| Absolute minimum temperature (°C) | -28.0 | -25.2 | -15.0 | -4.0 | 1.4 | 8.6 | 12.2 | 12.4 | 9.7 | -4.8 | -13.4 | -7.6 |
| 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) | 9.5 | 10.6 | 11.9 | 13.4 | 14.6 | 15.2 | 14.9 | 13.9 | 12.5 | 11.1 | 9.8 | 9.1 |
| Daylight minimum duration (h) | 9.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 4.4 | 7.0 | 7.3 | 9.4 | 12.0 | 12.1 | 12.5 | 11.6 | 10.0 | 7.1 | 7.2 | 4.5 |
| Precipitation (mm) | 58 | 50 | 77 | 43 | 77 | 30 | 78 | 59 | 57 | 78 | 13 | 34 |
| Sunny days | 19 | 19 | 16 | 17 | 20 | 16 | 13 | 16 | 14 | 17 | 23 | 17 |
| Rainy days | 5 | 7 | 9 | 12 | 11 | 14 | 18 | 15 | 16 | 13 | 5 | 10 |
| Snow days | 7 | 2 | 6 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 4 |
The best time to visit Black Hawk County during the most sunny months:
The largest precipitation sum in Black Hawk County is at