Automated Data Plotter
This application dynamically generates many types of graphs derived from various IEM data sources. Feel free to use these generated graphics in whatever way you wish.
1 Select a Chart Type
2 Configure Chart Options
Plot Description:
Based on IEM archives of METAR reports, this application produces the hourly frequency of a temperature at or above or below a temperature thresold. This application tries to only consider the top of the hour reports.3 Generated Chart
Based on recent timings, plot generation averages 5 seconds. Please wait while your chart is being generated...

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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 Jan 2025: Low January Relative Humidities
- 26 Dec 2024: Above Freezing in December
- 08 Mar 2023: Below 40 during March
- 11 Jun 2021: 90s During June
- 15 Nov 2019: November Hourly Temps
- 06 Dec 2018: 40+ in December
- 26 Apr 2017: 70+ in April
- 14 Jul 2015: 80 at 7 AM