The Iowa Environmental Mesonet (IEM) collects environmental data from cooperating members with observing networks. The data are stored and made available on this website.
IEM Daily Feature
First Sub 43°F Low
Posted: 20 Oct 2025 05:30 AM, Views: 548
Sunday started off chilly with Des Moines setting a new fall minimum low temperature of the season at 42°F. It has been a rather mild fall season so far with not much in the way of chilly weather and very little limited coverage of sub-freezing temperatures across Iowa. The featured chart looks into the first fall season date with a low temperature below 43°F for Des Moines. This year's value is third latest on record, behind 1914 and 1963. Cooler temperatures are expected this week with lows down into the 30s for much of the state and even the first wide spread freeze mid week.
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Soil Temperatures
Data from the Iowa State Soil Moisture Network is found on this website and daily soil temperature averages are used to produce the highlighted analysis.
Current Data
The IEM combines data from participating networks into products like maps shown above and web applications to analyze the data.