Degree Day Information for Iowa

Previous
May 10, 2004
May 17, 2004
May 31, 2004
June 7, 2004
June 14, 2004
June 21, 2004
June 28, 2004
July 5, 2004
July 12, 2004
July 19, 2004
July 26, 2004
 Degree Day Map
Base-50 degree days. (Accumulated degree days shown; departure from average shown in parentheses.)

One cold day

Our first degree-day accumulation map represents the degree days generated in Iowa for one day, a cold one at that. Accumulated base 50 F degree days were only 45 percent of normal, but that is for only one day. This illustrates what we already know: that Iowa weather, measured by heat accumulations, can be extremely variable from day to day.

On May 3, crop specialists reported the progress of corn planting at about 85 percent planted statewide, with about 15 to 20 percent of soybeans planted. Corn is emerging slowly around the state.

Updated July 22, 2004.

Why are
degree days
important for
crop management?

Updated each Wednesday until July 22, after which it is updated monthly.
Provided by Rich Pope, Extension Specialist
Department of Entomology, Iowa State University,
Ames, Iowa. Original weather data from
Midwest Climate Information Center. 		[Integrated Crop Management]
[Integrated Pest Management]
[To Iowa State Entomology Home Page]

This page is part of the Iowa State Entomology site. Last updated 7/22/04 by John VanDyk