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

High Temp Variability

Posted: 22 Mar 2019 05:34 AM, Views: 154
The featured chart look into the daily variability of high temperature for Des Moines based on period of record data. The top panel displays the spread of daily high temperatures expressed in standard deviation for a given day and for the day to day variability. The plot shows that this time of year has some of the highest spread for temperature (most variability). The bottom panel just presents a diagnostic looking at the relationship between the two variabilities plotted. The moral of the story is that the previous day's high temperature is a better predictor of the current days high than the average for the date.
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Previous Years' Features
Saratoga, IA Webcam:
News Items  

Peak Wind Gust added to ASOS download
Posted: 06 Mar 12:28 PM

Orange City AWOS Removed
Posted: 28 Feb 01:33 PM

ASOS/Metar Download Improvements
Posted: 13 Feb 11:12 AM

mesonet-nexrad service outage/change
Posted: 07 Jan 04:01 PM

23 Nov: NWS Data Outage [resolved]
Posted: 23 Nov 11:55 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.


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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Current Data

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

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ISU Agronomy
IIHR - University of Iowa