S
M
T
W
T
F
S
29
30°
15°
30
29°
14°
1
31°
15°
2
30°
15°
3
29°
14°
4
28°
13°
5
29°
14°
6
28°
14°
7
29°
18°
8
29°
16°
9
28°
20°
10
32°
23°
11
33°
18°
12
30°
14°
13
27°
10°
14
30°
13°
15
30°
17°
16
31°
21°
17
30°
20°
18
37°
21°
19
37°
16°
20
35°
20°
21
34°
16°
22
34°
16°
23
32°
20°
24
34°
21°
25
36°
22°
26
40°
18°
27
40°
8°
28
36°
6°
29
25°
10°
30
29°
17°
31
34°
17°
1
36°
20°
2
35°
22°
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 40°, with overnight lows between 6° and 23°. The average high for December is 32° with an average low of 16°. 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.
