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Public Information Statement
National Weather Service Chicago IL
953 AM CDT Wed Oct 1 2025 /1053 AM EDT Wed Oct 1 2025/

...A Look Back at the Climate for the Month of September 2025 for
Chicago and Rockford...

At Chicago, the average high temperature was 78.9 degrees, which
is 3.4 degrees above normal. The average low temperature was
59.7 degrees, which is 2.6 degrees above normal. The mean average
temperature for the month was 69.3 degrees, which is 3.0 degrees
above normal. 0.49 inches of liquid precipitation were recorded,
which is 2.70 inches below normal.

The following top ten monthly records were set for Chicago this
past September:
**Tied 7th driest September on record with 0.49 inches of liquid
  precipitation.


At Rockford, the average high temperature was 79.6 degrees, which
is 4.3 degrees above normal. The average low temperature was
53.4 degrees, which is 0.1 degrees below normal. The average
temperature for the month was 66.5 degrees, which is 2.1 degrees
above normal. 1.05 inches of liquid precipitation were recorded,
which is 2.57 inches below normal.

No daily or top ten monthly records were set for Rockford during
this past September.

..................................................................

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

$$