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.

Reset App IEM Explorer (Simplified)

1 Select a Chart Type

Choose from available chart types:

2 Configure Chart Options

Show Monthly, Annual or Custom Defined Period Averages

Inclusive Start Day (select custom period above)

(mm/dd)

Inclusive End Day (select custom period above)

(mm/dd)

Select Map Region

Select State to Plot (when appropriate)

Map Plot/Contour View Option

Which Variable to Plot

Which Unit System to Use (GDD/SDD always english)

Enter threshold (where appropriate)

Period plotting option

Start Year (inclusive) of Period One:

End Year (inclusive) of Period One:

Start Year (inclusive) of Period Two:

End Year (inclusive) of Period Two:

Color Ramp:

Reverse Colormap?

Image Pixel Size @100 DPI

Image Resolution (DPI) (50 to 500)

Select Output Format:

Plot Description:

This autoplot can either produce a plot of averages for a given period or annual over a period of years; or a difference between a second set of years. Autoplot 97 is a similar plot and perhaps more useful for some users than this one. This autoplot can be very slow when plotting more than a single state of data.

3 Generated Chart

Based on recent timings, plot generation averages 10 seconds. Please wait while your chart is being generated...

CSV Data Excel Download GeoJSON

If you notice plotting issues with the image above, please contact us and provide the URL address currently shown by your web browser.

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.

25 Mar 2025: Colder than Last Year
10 Jul 2023: July Precip Trends
12 Jul 2021: Summertime Precip Changes
02 Jan 2020: 2010s vs 2000s
09 Mar 2018: March Highs Above Freezing
08 Jul 2016: Change in 90+ degree days