Decorah weather observer Richard Bernatz says it was dry in Decorah in August.
Bernatz says 2.33 inches of rain fell during August--most of that in a 1.45 inch rainfall on August 23rd. The total was 1.65 inches less than normal August precipitation. Still, Decorah has a slight precipitation surplus of 1.55 inches over the last 12 months.
Bernatz says temperatures were slightly above average in August. The average daily temperature was 71 degrees--7/10ths of a degree above normal. No records were set in August, with the temperature hitting 90 degrees just once--on August 1st.
More information is available at http://faculty.luther.edu/~bernatzr/DecWx/