S
M
T
W
T
F
S
27
39°
31°
28
42°
23°
29
43°
24°
30
39°
21°
31
39°
20°
1
40°
18°
2
37°
20°
3
38°
23°
4
39°
19°
5
39°
18°
6
36°
18°
7
37°
19°
8
38°
22°
9
38°
30°
10
40°
25°
11
41°
17°
12
38°
16°
13
36°
17°
14
38°
20°
15
38°
26°
16
41°
20°
17
40°
16°
18
36°
15°
19
32°
30°
20
39°
27°
21
40°
31°
22
42°
25°
23
41°
28°
24
38°
31°
25
41°
24°
26
41°
18°
27
37°
17°
28
36°
22°
29
38°
27°
30
40°
18°
31
40°
16°
1
36°
19°
2
38°
17°
3
39°
13°
4
35°
19°
5
38°
21°
6
42°
17°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
January Weather in Dewitt
Dewitt's January 2027 forecast shows daily high temperatures ranging from 32° to 43°, with overnight lows between 13° and 31°. The average high for January is 39° 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 Dewitt. See also: February | March | April.