Average annual temperature is 20.3 °C
Absolute maximum temperature: 42.0 °C
Absolute minimum temperature: -4.5 °C
Number of sunny days: 211 days
Number of rainy days: 154 days
Look at detailed online map of Johnson County
* Weather data for Johnson 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) | 29.2 | 28.0 | 29.0 | 32.9 | 34.1 | 38.6 | 42.0 | 42.0 | 40.0 | 32.6 | 28.0 | 26.7 |
| Average daytime temperature (°C) | 17.4 | 16.8 | 21.5 | 23.1 | 27.5 | 33.2 | 37.2 | 39.5 | 33.7 | 26.3 | 18.9 | 17.3 |
| Average temperature (°C) | 11.2 | 10.2 | 15.3 | 17.6 | 22.4 | 27.4 | 31.4 | 33.6 | 28.1 | 20.8 | 13.9 | 11.2 |
| Average night temperature (°C) | 6.6 | 5.8 | 11.0 | 13.0 | 18.3 | 22.7 | 26.0 | 27.4 | 23.2 | 16.2 | 9.8 | 6.8 |
| Absolute minimum temperature (°C) | -4.5 | -4.2 | 0.4 | 7.2 | 13.0 | 18.3 | 21.7 | 22.6 | 18.9 | 2.4 | 0.0 | 0.1 |
| 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 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 |
| Daylight mean duration (h) | 10.3 | 11.0 | 12.0 | 13.0 | 13.8 | 14.2 | 14.0 | 13.3 | 12.4 | 11.4 | 10.5 | 10.1 |
| Daylight minimum duration (h) | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 | 10.0 |
| Sunshine mean duration (h) | 7.3 | 6.8 | 8.3 | 8.7 | 9.5 | 11.1 | 11.9 | 12.2 | 10.5 | 8.6 | 7.6 | 7.6 |
| Precipitation (mm) | 56 | 112 | 141 | 70 | 166 | 144 | 54 | 7 | 57 | 233 | 21 | 86 |
| Sunny days | 22 | 12 | 14 | 13 | 11 | 8 | 23 | 28 | 16 | 19 | 21 | 24 |
| Rainy days | 9 | 16 | 17 | 17 | 20 | 22 | 8 | 3 | 14 | 12 | 9 | 7 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Johnson County during the most sunny months:
The largest precipitation sum in Johnson County is at