S
M
T
W
T
F
S
27
29°
25°
28
33°
28°
29
39°
28°
30
39°
32°
31
42°
32°
1
42°
25°
2
44°
19°
3
43°
15°
4
27°
14°
5
25°
18°
6
26°
23°
7
34°
22°
8
33°
24°
9
33°
19°
10
34°
13°
11
30°
15°
12
24°
9°
13
27°
8°
14
20°
10°
15
21°
13°
16
24°
16°
17
28°
20°
18
34°
20°
19
35°
25°
20
33°
26°
21
36°
27°
22
37°
25°
23
36°
24°
24
34°
23°
25
32°
25°
26
35°
25°
27
34°
26°
28
35°
25°
29
35°
27°
30
Hist. Avg.
33°
19°
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 44°, with overnight lows between 8° and 32°. The average high for January is 33° with an average low of 21°. 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.
