Weather history and climate summary information is available for the following locations:
- Des Moines
- Sioux City
Warmest July Days
The warmest July days in Iowa are:
| Sioux City, Iowa | 1995 | 107.1°F |
| Sioux City, Iowa | 1980 | 106°F |
| Des Moines, Iowa | 2012 | 106°F |
| Sioux City, Iowa | 2012 | 104°F |
| Sioux City, Iowa | 1990 | 104°F |
Coldest July Days
The coldest July days in Iowa were:
| Sioux City, Iowa | 1995 | 46°F |
| Sioux City, Iowa | 1996 | 46°F |
| Sioux City, Iowa | 2004 | 46.4°F |
| Sioux City, Iowa | 1988 | 46.9°F |
| Sioux City, Iowa | 1997 | 48°F |
Wettest July Days
The wettest single days in July occurred:
| Sioux City, Iowa | 1996 | 6.3 inches |
| Sioux City, Iowa | 1977 | 3.6 inches |
| Des Moines, Iowa | 1981 | 3.2 inches |
| Des Moines, Iowa | 1973 | 2.9 inches |
| Sioux City, Iowa | 2010 | 2.8 inches |