Current Growing Degree Unit Information
It might be interesting to compare your GDU reading with others. Below are some links to sources where you can find GDU information for various locations in several states. You may have to further select either "crop weather" or " crop reports" for the GDU information. GDU Information for many states is available at http://www.usda.gov/nass/sso-rpts.htm.
Illinois http://www.nass.usda.gov/weather/cpcurr/il-crop-weather
Indiana http://www.nass.usda/in/cropweath/2002/we2002.txt
Iowa http://www.nass.usda.gov/ia
Michigan http://www.nass.usda.gov/weather/cpprev/mi-crop-weather
Minnesota http://www.nass.usda.gov/mn/
Nebraska http://www.agr.state.ne.us/agstats/cropwthr.htm
North Dakota http://www.ext.nodak.edu/weather/ndawn/listgdd.shtml
South Dakota http://abe.sdstate.edu/weather/gdd_mont.htm
Wisconsin (Includes
Minnesota as well)
http://alfi.soils.wisc.edu/~asig/wimnext//asos/SelectDailyGridDD.html