S
M
T
W
T
F
S
27
38°
30°
28
41°
30°
29
42°
28°
30
43°
27°
31
42°
24°
1
39°
22°
2
31°
21°
3
32°
23°
4
34°
23°
5
37°
22°
6
37°
17°
7
33°
18°
8
29°
23°
9
33°
18°
10
32°
16°
11
29°
17°
12
30°
19°
13
31°
21°
14
35°
23°
15
37°
24°
16
38°
24°
17
Hist. Avg.
32°
18°
18
Hist. Avg.
31°
18°
19
Hist. Avg.
31°
18°
20
Hist. Avg.
31°
18°
21
Hist. Avg.
31°
18°
22
Hist. Avg.
31°
18°
23
Hist. Avg.
32°
18°
24
Hist. Avg.
32°
18°
25
Hist. Avg.
32°
18°
26
Hist. Avg.
32°
18°
27
Hist. Avg.
32°
18°
28
Hist. Avg.
32°
18°
29
Hist. Avg.
32°
18°
30
Hist. Avg.
32°
18°
31
Hist. Avg.
32°
18°
1
Hist. Avg.
32°
18°
2
Hist. Avg.
32°
18°
3
Hist. Avg.
33°
18°
4
Hist. Avg.
33°
19°
5
Hist. Avg.
33°
19°
6
Hist. Avg.
33°
19°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
January Weather in Mount Prospect
Mount Prospect's January 2027 forecast shows daily high temperatures ranging from 29° to 43°, with overnight lows between 16° and 30°. The average high for January is 35° with an average low of 22°. 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 Mount Prospect. See also: February | March | April.
