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

Humid for early March

Posted: 07 Mar 2026 07:03 AM, Views: 1672
The increase in humidity on Friday was remarkable with practically the entire state reaching a dew point temperature of at least 50°F and a considerable portion of the state reaching at least 60°F by late afternoon and into the evening. All of this moisture helped to fuel abundant showers and thunderstorms which brought much needed rainfall to the state. The dew point readings on Friday were at the extreme end of what is possible for this time of year. The featured chart presents the maximum reported dew point by hour for Des Moines over the inclusive 1 January through 6 March period. The plot shows thirteen hours during yesterday with the reported dew point either tied or setting an unofficial hourly record. The reported 61°F dew point at 9 PM also appears to be the overall maximum for any hour during this selected period of days.
Rate Feature

Previous Years' Features
ISU Curtis Hall - Right, IA Webcam:
News Items  

Tracking TAF Amendments
Posted: 13 Feb 10:28 AM

IEM Archival Update
Posted: 24 Sep 11:07 PM

TAF Archive Fixes
Posted: 22 Aug 7:28 AM

Website Update
Posted: 13 Jun 12:45 PM

New IEM LSR App
Posted: 22 May 11:15 AM

Sign up for the Daily Bulletin

Current Website Performance:
Bandwidth: 41.4 MB/s
Total Website: 2,952 req/s
API/Data Services: 98.3 req/s
API Success: 100%

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.

Precipitation

More Precipitation Maps

Current Data

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

More current products »