Written by Theresa Rose on July 28, 2015

By Harry Hillaker, State Climatologist, Iowa Department of Agriculture & Land Stewardship

The past reporting week began with cooler and drier than normal weather prevailing through Thursday (23rd). However, there was rain scattered over much of the state on Monday (20th) but amounts were under one-third of an inch at all but a few locations with the early week storms. Much warmer and more humid weather was the rule on Friday (24th) and through the weekend. Thunderstorms brought rain to much of the eastern one-half of Iowa on Friday with heaviest rain in the Mason City area. Thunderstorms were also widespread across the southern one-third of the state on Saturday (25th) with rain falling over much of Iowa on Sunday (26th) morning. Weekly rain totals varied from only 0.01 inches at Davenport up to 4.89 inches at the Mason City Airport. The statewide average precipitation amount was 1.27 inches while normal for the week is 0.98 inches. This was the sixth week of the past seven to bring above normal precipitation to Iowa. However, rain totals over these past seven weeks have been slightly below normal over much of the northern one-third of Iowa with rain totals well above normal over much of the southern portion of the state. Temperatures for the week varied from a Tuesday (21st) morning low of 48 degrees at Swea City in Kossuth County to a Friday (24th) afternoon high of 97 degrees at Hawarden along the South Dakota border. Temperatures for the week as a whole averaged 0.2 degrees below normal with the weekend heat nearly cancelling out the earlier mild weather. The combination of heat and humidity pushed the heat index (what the air ‘feels like’) to 103 degrees at Sioux City on Friday and 101 degrees at Davenport and Iowa City on Saturday.