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Iowa weather by month
Historical Monthly Avg; September: 76° 52° October: 63° 40° November: 48° 28° IOWA MONTHLY WEATHER SUMMARY – NOVEMBER General Summary: Temperatures averaged degrees or degrees above normal while precipitation totaled. The hottest month of the year in Iowa City . The hot season lasts for months, from May 20 to September 21, with an average daily high temperature above 74°F. The month with the highest relative humidity is July ( %). Iowa are in the northern hemisphere. Summer starts here at the end of June and ends in September. There are the months of summer: June, July, August, September. The best time to visit are May, June, July, August, September. Summer starts here at the end of June and ends in September. There are the months of summer: June, July, August, September. The best time to visit are May, June, July, August, September. The month with the highest relative humidity is July ( %). Iowa are in the northern hemisphere. The conditions are pleasant compared to the heat of summer and the cold of winter. . Autumn is the best time to visit Iowa, during September and October, while late fall is cold and windy. Annual Weather Summary November to October Winter will be colder and drier than normal, on average, with the coldest periods in mid- and late.