The Iowa Environmental Mesonet (IEM) collects environmental data from cooperating members with observing networks. The data are stored and made available on this website.
Wettest Day in September
Posted: 25 Sep 2023 05:30 AM, Views: 559
With 1.30" reported on Friday, Waterloo had its wettest day of the year so far. The featured chart presents some metrics on the wettest day of the year for Waterloo. The left panels show the amount on the wettest day and a simple histogram for the events by the day of the year. The right panels plot the max precipitation by year and a cumulative distribution function for the values. Having just a 1.30" total as the maximum yearly value is rather low compared to the period of record data. Having the event during September is not all that exceptional and there have been years with the data occurring during later months of the year.
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Previous Years' Features
2019: Sultry September Streaks
2016: Muggy September Days
2014: 80 Degree Period
2013: Greener than Last Year
2012: Most 80+ degree days
2011: Dry last half of summer
2008: Running short
2007: Cooler each day
2006: Fall temperature swings
2002: Isidore
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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.