By Harry Hillaker, State Climatologist, Iowa Department of Agriculture & Land Stewardship
The past week was unseasonably cool with below normal temperatures prevailing every day except Wednesday (19th). The season’s first freeze was recorded at a few scattered northwest Iowa locations on Tuesday (18th) morning with Sibley reporting 30 degrees. However, much colder weather arrived on the weekend with a freeze recorded over much of the state on Sunday (23rd) morning. Sheldon and Spencer reported low temperatures of 22 degrees while a light freeze was reported in valley bottom locations all the way south to the Missouri border. On the one warm day Glenwood reported a Wednesday afternoon high of 90 degrees. Temperatures for the week as a whole averaged 7.5 degrees below normal. Meanwhile, light rain fell statewide on Monday (17th) with light to moderate rain over the northeast one-third of the state on Friday (21st). Additionally there were a few isolated showers and thunderstorms over far eastern and southern Iowa on Wednesday as a strong cold front advanced across the state. Weekly rain totals varied from just a trace at the Red Oak Airport to 0.69 inches at Muscatine. The statewide average precipitation was only 0.17 inches while normal for the week is 0.77 inches. This was the 18th week of the past 20 with less than normal precipitation.