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

Time for Warmth Yet

Posted: 23 Oct 2026 05:30 AM, Views: 687
A week of wonderful fall weather looks to last into the weekend prior to cooler temperatures along with rain chances to start off next week. There have been plenty of daily high temperatures into the upper 70s this week and one may wonder how much longer into the fall season can such temperatures last? The featured chart attempts to answer that question by plotting the latest calendar date a given high temperature was observed at or above a given threshold. The first item to notice is how anomalous the 15 December 2021 event was with a high temperature of 74°F that day! Values in the mid to upper 70s are possible for a few weeks yet, so there is still time for such warmth to occur!
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Previous Years' Features
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News Items  

7 Oct NWS Data Outage [resolved]
Posted: 7 Oct 9:36 AM

8 Oct Partial Outage [resolved]
Posted: 6 Oct 1:26 PM

5 Sep NWS Data Outage
Posted: 5 Sep 2:03 PM

4 Sep ISU Network Issue [resolved]
Posted: 4 Sep 11:03 AM

12 Aug Service Degradation [resolved]
Posted: 12 Aug 6:13 AM

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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.

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The IEM combines data from participating networks into products like maps shown above and web applications to analyze the data.

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