Average annual temperature is 11.0 °C
Absolute maximum temperature: 37.7 °C
Absolute minimum temperature: -25.9 °C
Number of sunny days: 191 days
Number of rainy days: 152 days
Number of snow days: 22 days
Look at detailed online map of Jo Daviess County
* Weather data for Jo Daviess 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) | 9.2 | 9.6 | 19.6 | 25.3 | 31.4 | 33.4 | 34.8 | 37.7 | 34.0 | 28.7 | 18.0 | 12.8 |
| Average daytime temperature (°C) | 1.7 | 3.8 | 7.5 | 16.0 | 23.6 | 28.5 | 29.3 | 28.8 | 25.1 | 16.5 | 9.1 | 6.0 |
| Average temperature (°C) | -2.2 | -1.7 | 2.1 | 9.3 | 16.9 | 22.1 | 23.3 | 23.1 | 19.6 | 12.2 | 4.3 | 2.2 |
| Average night temperature (°C) | -5.1 | -6.4 | -2.0 | 4.1 | 10.5 | 15.8 | 17.8 | 18.3 | 15.3 | 8.4 | 0.5 | -0.2 |
| Absolute minimum temperature (°C) | -25.9 | -22.7 | -14.7 | -2.1 | 1.5 | 8.7 | 13.7 | 11.4 | 9.9 | -2.6 | -12.0 | -7.7 |
| 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) | 3.8 | 7.1 | 6.5 | 8.9 | 11.7 | 12.3 | 12.4 | 11.4 | 9.6 | 7.0 | 7.1 | 4.1 |
| Precipitation (mm) | 67 | 96 | 78 | 115 | 42 | 34 | 65 | 58 | 97 | 86 | 35 | 54 |
| Sunny days | 13 | 16 | 13 | 16 | 22 | 17 | 14 | 15 | 12 | 15 | 22 | 16 |
| Rainy days | 8 | 9 | 15 | 14 | 9 | 13 | 17 | 16 | 18 | 14 | 7 | 12 |
| Snow days | 10 | 3 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 1 | 3 |
The best time to visit Jo Daviess County during the most sunny months:
The largest precipitation sum in Jo Daviess County is at