Iowa crops continue in good condition as we finish one of the coolest July 4 holidays on record. Each of the last three weeks have alternated between above and below normal temperatures. As of July 5, we have accumulated 87 fewer degree days statewide since May 1 compared with the 30-year average. That is roughly equivalent to 3.5 average July 4 days, so we aren't in terrible shape. The cool-warm-cool pattern appears now to continue as the forecast is for above normal temperatures through the middle of July.
Iowa State University
Pope, Richard O., "Degree Days - Temperature Roller Coaster" (2009). Integrated Crop Management News. 609.
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