S
M
T
W
T
F
S
29
49°
40°
30
50°
44°
31
51°
45°
1
51°
35°
2
37°
28°
3
38°
26°
4
35°
31°
5
35°
32°
6
40°
33°
7
37°
32°
8
33°
28°
9
36°
26°
10
38°
25°
11
39°
24°
12
37°
29°
13
42°
33°
14
51°
40°
15
51°
39°
16
43°
30°
17
44°
37°
18
41°
31°
19
35°
31°
20
40°
35°
21
43°
36°
22
42°
34°
23
44°
34°
24
50°
38°
25
45°
33°
26
43°
33°
27
47°
37°
28
47°
40°
29
46°
37°
30
45°
33°
31
43°
36°
1
42°
38°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
January Weather in Alton
Alton's January 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for January is ° with an average low of °. 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 Alton. See also: February | March | April.
