S
M
T
W
T
F
S
27
27°
13°
28
27°
13°
29
28°
16°
30
27°
23°
31
27°
18°
1
33°
14°
2
26°
13°
3
24°
15°
4
24°
24°
5
33°
30°
6
36°
15°
7
37°
11°
8
35°
9°
9
22°
12°
10
24°
10°
11
24°
10°
12
21°
9°
13
20°
11°
14
22°
10°
15
24°
12°
16
23°
13°
17
25°
18°
18
26°
12°
19
26°
11°
20
24°
17°
21
25°
23°
22
28°
28°
23
36°
30°
24
37°
29°
25
38°
28°
26
37°
27°
27
37°
28°
28
38°
26°
29
37°
24°
30
33°
21°
31
Hist. Avg.
33°
19°
1
Hist. Avg.
33°
19°
2
Hist. Avg.
34°
20°
3
Hist. Avg.
34°
20°
4
Hist. Avg.
34°
20°
5
Hist. Avg.
34°
20°
6
Hist. Avg.
34°
20°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
January Weather in Chicago
Chicago's January 2027 forecast shows daily high temperatures ranging from 20° to 38°, with overnight lows between 9° and 30°. The average high for January is 29° with an average low of 18°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how January weather will actually feel in Chicago. See also: February | March | April.
