S
M
T
W
T
F
S
29
34°
22°
30
35°
22°
1
34°
15°
2
36°
12°
3
32°
20°
4
30°
25°
5
36°
26°
6
37°
26°
7
40°
23°
8
39°
21°
9
34°
10°
10
31°
8°
11
28°
12°
12
27°
8°
13
27°
10°
14
23°
15°
15
28°
14°
16
30°
14°
17
32°
19°
18
33°
21°
19
34°
23°
20
38°
18°
21
40°
14°
22
32°
18°
23
33°
20°
24
33°
14°
25
34°
11°
26
27°
5°
27
24°
1°
28
22°
3°
29
18°
-3°
30
21°
-2°
31
16°
0°
1
15°
10°
2
19°
3°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Sparta
Sparta's December 2026 forecast shows daily high temperatures ranging from 15° to 40°, with overnight lows between -3° and 26°. The average high for December is 30° with an average low of 14°. 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 Sparta. See also: January | February | March.
