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

Select Station

Plot this year's observations:

Which Variable

Threshold Direction

Threshold [%] for Frequency

Smoothing Window Size (days), 1 disables, max 60

Image Pixel Size @100 DPI

Image Resolution (DPI) (50 to 500)

Select Output Format:

Plot Description:

Based on available hourly or better observations, the IEM computes local calendar day statistics for variables like relative humidity, dew point, and feels like (read: windchill or heat index) temperature. This autoplot computes a simple climatology of these values with a smoothing to remove some of the day to day variability.

Note that the observations plotted can fall outside of the smoothed range of values, as the smoothing is applied to the climatology and not the individual observations.

3 Generated Chart

Based on recent timings, plot generation averages 3 seconds. Please wait while your chart is being generated...

CSV Data Excel Download

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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.

25 Apr 2025: 60°F+ Dew Points
15 Jul 2024: Daily Max Feels Like
29 Mar 2022: 2022 Daily RH
10 Aug 2020: Peak RH
13 Dec 2019: Relative Humidities
17 May 2018: Daily RH%
13 Sep 2016: Daily Relative Humidity
06 Oct 2011: Very low humidities