25.08
tue
tue
Day
73°F
W 6 mph
Precip.
14%
14%
Night
68°F
N 7 mph
Precip.
20%
20%
26.08
wed
wed
Day
79°F
NE 11 mph
Precip.
15%
15%
Night
72°F
E 6 mph
Precip.
14%
14%
27.08
thu
thu
Day
73°F
S 9 mph
Precip.
4%
4%
Night
72°F
NE 7 mph
Precip.
8%
8%
28.08
fri
fri
Day
79°F
SW 4 mph
Precip.
2%
2%
Night
66°F
SW 7 mph
Precip.
20%
20%
29.08
sat
sat
Day
79°F
N 9 mph
Precip.
3%
3%
Night
70°F
N 11 mph
Precip.
20%
20%
30.08
sun
sun
Day
84°F
NE 17 mph
Precip.
10%
10%
Night
75°F
N 8 mph
Precip.
30%
30%
31.08
mon
mon
Day
79°F
NE 10 mph
Precip.
36%
36%
Night
79°F
NE 10 mph
Precip.
17%
17%
Sea water temperature in August, °F
Show year:
2026
2025
2024
The average sea water temperature in August of 2026 was 72.4°F. The highest and lowest sea temperatures during the month were 74.3°F and 68.5°F.
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: 15:53
August 25, tuesday
1800
77°F
NE
9 mph
9 mph
2100
72°F
N
7 mph
7 mph
August 26, wednesday
0000
68°F
N
7 mph
7 mph
0300
66°F
N
10 mph
10 mph
0600
64°F
NE
11 mph
11 mph
0900
66°F
NE
13 mph
13 mph
1200
79°F
NE
11 mph
11 mph
1500
77°F
NE
11 mph
11 mph
