14.09
mon
mon
Day
68°F
W 9 mph
Precip.
1%
1%
Night
66°F
N 14 mph
Precip.
3%
3%
15.09
tue
tue
Day
72°F
NE 9 mph
Precip.
56%
56%
Night
70°F
S 8 mph
Precip.
18%
18%
16.09
wed
wed
Day
68°F
SW 7 mph
Precip.
15%
15%
Night
66°F
W 6 mph
Precip.
12%
12%
17.09
thu
thu
Day
66°F
SE 4 mph
Precip.
65%
65%
Night
68°F
SW 8 mph
Precip.
28%
28%
18.09
fri
fri
Day
72°F
NW 9 mph
Precip.
5%
5%
Night
66°F
NW 9 mph
Precip.
11%
11%
19.09
sat
sat
Day
72°F
N 14 mph
Precip.
40%
40%
Night
64°F
S 17 mph
Precip.
50%
50%
20.09
sun
sun
Day
64°F
SW 20 mph
Precip.
29%
29%
Night
57°F
W 18 mph
Precip.
3%
3%
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 65.0°F. The highest and lowest sea temperatures during the month were 70.2°F and 59.0°F.
Air temperature in Chicago, °F
Precipitation total in Chicago, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Chicago
Chicago on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Chicago
Local time: 16:05
September 14, monday
1800
72°F
NW
14 mph
14 mph
2100
66°F
NW
16 mph
16 mph
September 15, tuesday
0000
66°F
N
14 mph
14 mph
0300
66°F
N
17 mph
17 mph
0600
68°F
N
14 mph
14 mph
0900
66°F
N
11 mph
11 mph
1200
72°F
NE
9 mph
9 mph
1500
77°F
E
7 mph
7 mph
