Measurements:
°C
°F
CURRENT WEATHER
06:33
Chicago
44°F
N 16 mph
Feels like: 36°F
Precip: 100%
World Resorts USA Chicago Weather

7 Day Weather Forecast

12.18
thu
DAY
52°F
N 23 mph
precip
0%
NIGHT
24°F
E 16 mph
precip
0%
12.19
fri
DAY
12°F
SE 17 mph
precip
0%
NIGHT
20°F
N 6 mph
precip
0%
12.20
sat
DAY
32°F
NE 16 mph
precip
0%
NIGHT
28°F
SE 11 mph
precip
0%
12.21
sun
DAY
34°F
E 11 mph
precip
0%
NIGHT
28°F
W 5 mph
precip
100%
12.22
mon
DAY
32°F
NW 7 mph
precip
0%
NIGHT
32°F
N 10 mph
precip
0%
12.23
tue
DAY
36°F
NE 7 mph
precip
0%
NIGHT
36°F
N 2 mph
precip
0%
12.24
wed
DAY
38°F
NW 9 mph
precip
100%
NIGHT
48°F
NE 7 mph
precip
64%

Chicago Sea Water Temperature in December, °F

Select Year: 2025 2024 2023

The average sea surface temperature in December 2025 for Chicago was 4.8°F. The maximum and minimum values were 2.4°F and 7.1°F respectively.

Chicago on the Weather Map

Best Time to Visit Chicago
The most sunny months:
September 17 days
August 16 days
July 15 days
The most warm months:
July 83.8 °F
August 83.2 °F
June 77.0 °F
Warmest sea temperature:
August 72.5 °F
July 70.2 °F
September 67.9 °F
The most cold months:
January 25.8 °F
February 28.7 °F
December 34.4 °F
The most rainy months:
June 7 days
May 6 days
July 5 days
The most windy months:
November 12 mph
January 12 mph
February 11 mph
more details