A storm will track north of the Great Lakes Friday with widespread rain showers across the Eastern U.S. along and ahead of its cold front. Further south along the front isolated severe thunderstorms are possible. A Pacific storm will continue moving across the Northwest U.S. into Friday with additional low elevation rain, gusty winds, and mountain snow. Read More >
Overview
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CoCoRaHS Observer Monthly Precipitation Summary
CoCoRaHS Observer Monthly Snowfall Summary
Chicago Daily Climate Data for October 2025
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| Daily high and low temperatures observed at Chicago-O'Hare Airport in October 2025 plotted relative to the normal and record high and low temperatures for each date. |
Rockford Daily Climate Data for October 2025
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| Daily high and low temperatures observed at Rockford Airport in October 2025 plotted relative to the normal and record high and low temperatures for each date. |
October 2025 Climate Summary for Chicago and Rockford
Public Information Statement...CORRECTED National Weather Service Chicago IL 631 AM CST Sun Nov 2 2025 /731 AM EST Sun Nov 2 2025/ ...A Look Back at the Climate for the Month of October 2025 for Chicago and Rockford... At Chicago, the average high temperature was 66.1 degrees, which is 3.4 degrees above normal. The average low temperature was 50.2 degrees, which is 4.8 degrees above normal. The mean average temperature for the month was 58.1 degrees, which is 4.1 degrees above normal. 2.67 inches of liquid precipitation were recorded, which is 0.76 inches below normal. 0.0 inches of snow were recorded, which is 0.2 inches below normal. No daily or top ten monthly records were set for Chicago during this past October. At Rockford, the average high temperature was 67.4 degrees, which is 5.1 degrees above normal. The average low temperature was 44.9 degrees, which is 3.1 degrees above normal. The average temperature for the month was 56.2 degrees, which is 4.2 degrees above normal. 1.40 inches of liquid precipitation were recorded, which is 1.23 inches below normal. 0.0 inches of snow were recorded, which is 0.2 inches below normal. No daily or top ten monthly records were set for Rockford during this past October. .................................................................. 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
Events
No significant weather events occurred in northern Illinois and northwest Indiana this past October.
NWS Chicago Science and Past Events Page
Additional Information
Local Climate Resources:
State/Regional/National Climate Resources:
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