Average annual temperature is 18.7 °C
Absolute maximum temperature: 37.5 °C
Absolute minimum temperature: -3.4 °C
Number of sunny days: 280 days
Number of rainy days: 85 days
Look at detailed online map of Iowa
* Weather data for Iowa South Africa is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 34.3 | 34.3 | 31.8 | 28.4 | 27.6 | 23.7 | 24.9 | 27.5 | 32.4 | 36.1 | 37.5 | 36.7 |
| Average daytime temperature (°C) | 31.1 | 29.0 | 27.9 | 25.1 | 21.8 | 18.7 | 18.5 | 22.5 | 26.1 | 29.9 | 32.5 | 31.8 |
| Average temperature (°C) | 24.6 | 22.4 | 21.1 | 17.6 | 14.5 | 10.8 | 10.9 | 14.0 | 17.5 | 21.9 | 24.9 | 24.7 |
| Average night temperature (°C) | 17.3 | 15.9 | 14.5 | 10.5 | 7.5 | 3.7 | 4.0 | 5.7 | 8.6 | 13.1 | 16.4 | 17.4 |
| Absolute minimum temperature (°C) | 12.7 | 11.8 | 9.7 | 4.5 | 1.5 | 0.0 | -3.4 | 1.1 | 1.7 | 8.0 | 7.0 | 12.5 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 | 13.0 |
| Daylight mean duration (h) | 13.6 | 13.0 | 12.2 | 11.4 | 10.8 | 10.5 | 10.6 | 11.2 | 11.9 | 12.7 | 13.4 | 13.8 |
| Daylight minimum duration (h) | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 | 10.0 | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 |
| Sunshine mean duration (h) | 12.7 | 10.8 | 11.0 | 10.5 | 9.5 | 9.5 | 9.7 | 10.3 | 10.8 | 11.3 | 11.7 | 11.8 |
| Precipitation (mm) | 9 | 55 | 8 | 13 | 17 | 2 | 0 | 0 | 2 | 13 | 8 | 75 |
| Sunny days | 22 | 10 | 21 | 23 | 26 | 28 | 30 | 31 | 27 | 26 | 19 | 17 |
| Rainy days | 9 | 18 | 10 | 7 | 5 | 2 | 1 | 0 | 3 | 5 | 11 | 14 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Iowa is at