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

80+ Degree Days

Posted: 19 Sep 2018 05:33 AM, Views: 204
Tuesday was another very warm September day in Iowa until storms knocked temperatures back into the 60s and low 70s. Ames was able to reach 80 degrees again for over the 100th day this year. The featured chart displays the number of accumulated days with a high temperature of at least 80 degrees. The average line shows that by the end of September, we mostly stop accumulating days with this warm of a high temperature. The forecast expects a few more warm days before cooler weather arrives for the weekend.
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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.


Besides point observations of precipitation, the IEM also processes gridded rainfall products made available by NOAA. This information is archived and made available in GIS ready formats.

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