S
M
T
W
T
F
S
28
71°
57°
29
66°
36°
30
46°
29°
31
53°
28°
1
63°
30°
2
64°
35°
3
73°
53°
4
68°
46°
5
56°
40°
6
73°
38°
7
76°
54°
8
70°
49°
9
77°
58°
10
79°
62°
11
62°
36°
12
50°
27°
13
61°
28°
14
53°
36°
15
48°
23°
16
55°
19°
17
62°
40°
18
45°
28°
19
50°
28°
20
55°
26°
21
59°
26°
22
68°
39°
23
58°
46°
24
54°
46°
25
58°
42°
26
51°
28°
27
43°
18°
28
54°
29°
29
54°
28°
30
56°
29°
31
41°
21°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
January Weather in Sumter
Sumter's January 2026 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 Sumter. See also: February | March | April.
