IOWA PRELIMINARY WEATHER SUMMARYWritten by Theresa Rose on August 23, 2016
By Harry Hillaker, State Climatologist, Iowa Department of Agriculture & Land Stewardship
Both temperatures and precipitation averaged close to seasonal normals across Iowa. The reporting week began with slightly cooler than normal weather on Monday (15th) when Estherville reported a morning low of 54 degrees. Warmer than normal weather prevailed from Tuesday (16th) through Friday (19th) with Thursday (18th) being the hottest day in most areas with highs in the upper eighties to lower nineties. Finally, the weekend brought much cooler weather with highs in the seventies statewide. Temperature extremes for the week ranged from Thursday afternoon highs of 92 degrees at Des Moines, Sioux City, Osceola and Sigourney while Spencer and Sheldon reported the lowest temperatures with 46 degree minimums on Sunday (21st) morning. Temperatures for the week as a whole average 0.3 degrees above normal. Monday (15th) was mostly dry while rain was scattered over the western one-third of Iowa on Tuesday (16th) and across the eastern two-thirds of the state on Wednesday (17th) with a few central and north central locations picking up over an inch of rain. Rain fell mostly over far northeast Iowa on Thursday (18th) night with locally heavy amounts over three inches near Elkader. Finally, rain fell statewide from Friday (19th) afternoon into Saturday (20th) morning with rain amounts of one to two inches common from west central into north central and northeast Iowa. Rain totals for the week varied from only 0.03 inches at Doon in Lyon County to 4.19 inches near Volga in Clayton County. The statewide average precipitation was 1.07 inches, or just slightly above the weekly normal of 0.96 inches.