Average annual temperature is 16.8 °C
Absolute maximum temperature: 45.1 °C
Absolute minimum temperature: -1.7 °C
Number of sunny days: 257 days
Number of rainy days: 108 days
Look at detailed online map of Iowa City
* Weather data for Iowa City 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) | 17.8 | 18.6 | 18.9 | 32.9 | 36.6 | 41.6 | 45.1 | 44.1 | 35.9 | 35.6 | 25.1 | 17.9 |
| Average daytime temperature (°C) | 13.3 | 13.3 | 14.1 | 22.5 | 28.3 | 33.2 | 39.2 | 37.6 | 31.3 | 27.2 | 18.7 | 14.8 |
| Average temperature (°C) | 8.4 | 7.0 | 8.8 | 14.4 | 19.7 | 23.6 | 28.8 | 28.0 | 22.7 | 18.4 | 11.4 | 9.2 |
| Average night temperature (°C) | 5.1 | 2.4 | 5.1 | 7.9 | 12.5 | 15.6 | 19.4 | 19.6 | 15.5 | 12.1 | 6.2 | 5.1 |
| Absolute minimum temperature (°C) | -1.5 | -1.1 | -1.7 | -0.6 | 6.8 | 11.7 | 12.8 | 15.2 | 12.0 | 3.3 | -0.1 | -0.5 |
| 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) | 9.8 | 10.7 | 12.0 | 13.2 | 14.3 | 14.9 | 14.6 | 13.7 | 12.4 | 11.2 | 10.0 | 9.5 |
| 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) | 5.1 | 7.4 | 7.0 | 11.4 | 11.9 | 13.4 | 13.5 | 12.1 | 10.9 | 9.2 | 7.8 | 5.6 |
| Precipitation (mm) | 276 | 83 | 238 | 17 | 21 | 0 | 0 | 7 | 36 | 15 | 55 | 159 |
| Sunny days | 12 | 15 | 9 | 22 | 24 | 30 | 30 | 29 | 25 | 23 | 23 | 15 |
| Rainy days | 19 | 13 | 22 | 8 | 7 | 0 | 1 | 2 | 5 | 8 | 7 | 16 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Iowa City during the most sunny months:
The largest precipitation sum in Iowa City is at