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