Overview
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| August was a generally wet and stormy month for most of the area. While both Chicago and Rockford failed to record a 90 degree temperature reading during this past August, the month nevertheless finished with near-normal temperatures in both cities. |
CoCoRaHS Observer Monthly Precipitation Summary
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| Daily high and low temperatures observed at Chicago-O'Hare Airport in August 2026 plotted relative to the normal and record high and low temperatures for each date. |
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| Daily high and low temperatures observed at Rockford Airport in August 2026 plotted relative to the normal and record high and low temperatures for each date. |
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| This past meteorological summer finished with near-normal temperatures across the area. Most areas in and south of the Chicago metro received above normal precipitation during the season, though it was drier in the Rockford area on the whole. |
CoCoRaHS Observer Seasonal Precipitation Summary
Chicago Daily Climate Data for Meteorological Summer 2026
Rockford Daily Climate Data for Meteorological Summer 2026
August 2026 Climate Summary for Chicago and Rockford
Public Information Statement...CORRECTED National Weather Service Chicago IL 125 PM CDT Tue Sep 1 2026 /225 PM EDT Tue Sep 1 2026/ ...A Look Back at the Climate for the Month of August 2026 for Chicago and Rockford... At Chicago, the average high temperature was 81.6 degrees, which is 0.9 degrees below normal. The average low temperature was 66.8 degrees, which is 1.7 degrees above normal. The mean average temperature for the month was 74.2 degrees, which is 0.4 degrees above normal. 5.02 inches of liquid precipitation were recorded, which is 0.77 inches above normal. No daily or top ten monthly records were set for Chicago during this past August. At Rockford, the average high temperature was 81.4 degrees, which is 0.6 degrees below normal. The average low temperature was 62.1 degrees, which is 0.3 degrees above normal. The average temperature for the month was 71.7 degrees, which is 0.2 degrees below normal. 2.36 inches of liquid precipitation were recorded, which is 1.83 inches below normal. The following daily records were set for Rockford this past August: * Tied record daily coldest high temperature of 69 degrees on the 1st. No top ten monthly records were set for Rockford during this past August. .................................................................. Chicago's climatic period of record dates back to: 1871 for precipitation 1872 for temperatures 1884 for snowfall Rockford's climatic period of record dates back to: 1905 for temperatures, precipitation, and snowfall $$
Latest Monthly Climate Report: Chicago (O'Hare) | Rockford
Meteorological Summer (Jun-Aug) 2026 Climate Summary for Chicago and Rockford
Public Information Statement National Weather Service Chicago IL 628 PM CDT Tue Sep 1 2026 /728 PM EDT Tue Sep 1 2026/ ...A Look Back at the Climate for Meteorological Summer (June, July, August) 2026 for Chicago and Rockford... At Chicago, the average high temperature was 82.1 degrees, which is 0.4 degrees below normal. The average low temperature was 65.5 degrees, which is 1.4 degrees above normal. The mean average temperature for the season was 73.8 degrees, which is 0.5 degrees above normal. 15.38 inches of liquid precipitation were recorded, which is 3.32 inches above normal. Daily and top ten monthly records established for Chicago this past summer... June: None July: * Record daily warmest low temperature of 80 degrees on the 1st. * Record daily liquid precipitation of 1.71 inches on the 3rd. August: None No top ten seasonal records were set for Chicago during this past summer. At Rockford, the average high temperature was 82.1 degrees, which is 0.1 degrees below normal. The average low temperature was 61.9 degrees, which is 0.2 degrees above normal. The average temperature for the season was 72.0 degrees, which is 0.1 degrees above normal. 11.25 inches of liquid precipitation were recorded, which is 1.98 inches below normal. Daily and top ten monthly records established for Rockford this past summer... June: * Tied record daily warmest low temperature of 71 degrees on the 9th. * Tied record daily warmest low temperature of 75 degrees on the 29th. * Record daily warmest low temperature of 77 degrees on the 30th. July: None August: * Tied record daily coldest high temperature of 69 degrees on the 1st. No top ten seasonal records were set for Rockford during this past summer. .................................................................. Chicago's climatic period of record dates back to: 1871 for precipitation 1872 for temperatures 1884 for snowfall Rockford's climatic period of record dates back to: 1905 for temperatures, precipitation, and snowfall $$
Latest Seasonal Climate Report: Chicago (O'Hare) | Rockford
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