From a short historical prospective, I am including the following data from our Agronology 10 Research Center at Walcott, Iowa. The norms are a 30 year average from the US Weather Service.
Weather Data for 2010 thru 2013
Time Period (Months) Rainfall (Inches)______________
1 April – 31 July__ Norm 2010 2011 2012 2013
16.08 28.70 15.55 12.60 25.90
It is generally felt that a dry July will influence corn and soybean yields downward.
So how dry was the Ag 10 Research Center in 2013? The Research Center received only 2.55 inches of rain in July which is 63% of the norm.
Our June rainfall was slightly above average at 4.75 inches.