Climate Typical of the northern half of Illinois, Moline experiences a humid continental climate (Köppen Dfa) with hot, humid summers and cold, moderately snowy winters; precipitation is distributed throughout the year but is greater in the warmer months. The normal monthly mean temperature ranges from in January to in July; on average, there are 23 days of + highs, 43 days with a high at or below freezing, and 11 days of sub- lows annually. Extremes in temperature have ranged from , set on July 14, 1936, down to , set on January 30, 2019; the record coldest maximum temperature is on January 18, 1994 and January 29, 1966, while the record warmest minimum is , set the same day of the record high. Temperatures reach only several years per decade, and readings are even rarer; the last occurrence of each was July 25, 2012 and January 31, 2019. The average window for freezing temperatures is October 10 thru April 24, allowing a growing season of 168 days.
Climate Typical of the northern half of Illinois, Moline experiences a humid continental climate (Köppen Dfa) with hot, humid summers and cold, moderately snowy winters; precipitation is distributed throughout the year but is greater in the warmer months. The normal monthly mean temperature ranges from in January to in July; on average, there are 23 days of + highs 43 days with a high at or below freezing, and 11 days of sub- lows annually. Extremes in temperature have ranged from , set on July 14, 1936, down to , set on January 30, 2019; the record coldest maximum temperature is on January 18, 1994 and January 29 1966, while the record warmest minimum is , set the same day of the record high. Temperatures reach only several years per, decade, and readings are even rarer; the last occurrence of each was July 25, ,2012 and January 31, 2019. The average window for freezing temperatures is October 10 thru April 24, allowing a growing season of 168 days.