S
M
T
W
T
F
S
29
30°
14°
30
29°
13°
1
30°
21°
2
31°
25°
3
33°
22°
4
32°
16°
5
29°
14°
6
30°
13°
7
30°
15°
8
28°
15°
9
28°
12°
10
27°
14°
11
30°
13°
12
30°
14°
13
32°
17°
14
34°
20°
15
36°
16°
16
37°
20°
17
31°
17°
18
36°
20°
19
37°
22°
20
37°
16°
21
34°
19°
22
36°
20°
23
36°
17°
24
35°
22°
25
33°
15°
26
36°
8°
27
29°
8°
28
25°
17°
29
29°
11°
30
30°
19°
31
30°
20°
1
35°
20°
2
36°
16°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Sumpter
Sumpter's December 2026 forecast shows daily high temperatures ranging from 25° to 37°, with overnight lows between 8° and 25°. The average high for December is 32° with an average low of 17°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how December weather will actually feel in Sumpter. See also: January | February | March.
