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Chicago weather in September

Weather in Chicago: September

Average day temperature: 72.8°F
Average night temperature: 63.9°F
Sea water temperature: 66.2°F
Number of sunny days: 16 days
Day length: 11.8 - 13.1 hours
Number of rainy days: 4 days
Precipitation totals: 2.5 in.

Air temperature in September, °F

Show year:
2024
2023
2022

The highest day temperature during September of 2024 was 86°F. At the same time the lowest night temperature was 54°F. Day and night temperature averages during September were 74.7°F and 65.7°F.

Sea water temperature in Chicago in September, °F

Show year:
2024
2023
2022

The average sea water temperature in September of 2024 was 71.6°F. The highest and lowest sea temperatures during the month were 75.2°F and 68.5°F.

Sunny, partly cloudy and cloudy days

Mostly all days in September are sunny but cloudy days are also possible.

Precipitation total in September, in.

Precipitation total value in Chicago in September is 2.2 in. Other months of the year show relatively similar values.

Wind speed in September, mph

The average wind speed value in September is 9.2 mph It makes September one of the least windy months of the year.

Average sunny hours

This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in September is: 7.7.

Best time for vacation in Chicago

Sunniest months:
July 16 days
August 16 days
September 16 days
Warmest months:
July 80.2 °F
August 79.9 °F
June 74.0 °F
Warmest sea temp:
August 70.0 °F
July 67.8 °F
September 66.2 °F
Coldest months:
January 28.4 °F
February 30.9 °F
December 36.1 °F
Rainiest months:
June 7 days
May 7 days
July 6 days
Windiest months:
November 12.4 mph
January 12.0 mph
February 11.8 mph

Chicago on a weather map

Chicago
+32°F
E 17 mph
Feels like: +21°F
Precip.: 0%
Places in USA:
Name
°F
+46°F
+43°F
+73°F
+73°F
+43°F
+57°F
+73°F
+64°F
+50°F
+52°F
+55°F
+68°F
+64°F
+52°F
+32°F
24 Hours Forecast
Chicago
Local time: 06:03
November 21, thursday
0900
32°F
E
19 mph
1200
34°F
E
19 mph
1500
36°F
SE
24 mph
1800
37°F
S
30 mph
2100
41°F
S
19 mph
November 22, friday
0000
43°F
SE
14 mph
0300
41°F
SE
14 mph
0600
41°F
SE
19 mph
Units of measurement: °C / °F