Iowa Environmental Mesonet

Iowa State University Department of Agronomy

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Growing Season Charts

This application will plot an accumulated variable for a time period of your selection. Data is based on the automated sensors from the ISU AG Climate network. A similiar application exists based on the COOP network data, which is of higher quality for temperature and precipitation, but it is not near realtime.
Plot Parameter Year Month Day

Dynamic Historical Data:

Daily Data Plots
Growing Season Plots

Open this plot in a new window for comparison with other plots. Once the image is loaded up in another window, you can modify this plots parameters.

*Note: Precipitation recorded from this network is not reliable. You should use precipitation obs from the COOP network.

Departure from climatology is shown below the accumulated value.

Data Listing

# 2007 Growing Degree Days (base=50) (May 01 - Oct 01)
#-----------------------snip------------------
         StationName,  Latitude, Longitude,     gdd50
              NASHUA,     42.75,    -92.50,      2831
           MUSCATINE,     41.22,    -91.06,      3329
        CEDAR RAPIDS,     41.90,    -91.50,      2920
              CALMAR,     43.16,    -91.87,      2889
                AMES,     42.03,    -93.80,      3086
             Gilbert,  42.11109, -93.58334,      3086
               LEWIS,     41.40,    -95.00,      3148
          SUTHERLAND,     42.96,    -95.50,      2809
      CRAWFORDSVILLE,      41.2,    -91.50,      3202
            CHARITON,     41.00,    -93.32,      3111
             KANAWHA,     42.94,    -93.90,      2868
             CASTANA,     42.06,    -95.82,      3047

You should be able to 'copy & paste' this raw data listing into a simple text editor and save the data file on your machine. Most GIS systems can then import this dataset as a layer. You may have to omit the commented lines (#) if your GIS has trouble importing the data.