Automated Data Plotter
This application dynamically generates many types of graphs. These graphs are derived from processing of various data sources done by the IEM. Please feel free to use these generated graphics in whatever way you wish. Reset App. The IEM Explorer application offers a simplified frontend to some of these autoplots.
Second, select specific chart options::
Plot Description:
Create plots of yearly totals and optionally fit a linear trendline. Here is a brief description of some of the available metrics.- Frost Free Days: Number of days each year between the last spring sub 32F temperature and first fall sub 32F temperature.
If you plot the DJF period, the year shown is the year of the December within the three year period.
Based on a sampling of recent timings for this application, plot generation time has averaged 1 seconds. Hold on for the plot is generating now!

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IEM Daily Features using this plot
The IEM Daily Features found on this website often utilize plots found on this application. Here is a listing of features referencing this plot type.
- 28 Mar 2024: Spring Season Temp Trend
- 10 Mar 2022: Winter Low Trend
- 02 Jul 2020: Summer Average Highs
- 28 Dec 2018: Waterloo Tops 1993
- 08 Oct 2018: New Hampton Precipitation Record
- 30 Nov 2017: Frost Free Days