S
M
T
W
T
F
S
29
32°
18°
30
34°
22°
1
34°
13°
2
33°
11°
3
28°
20°
4
30°
22°
5
35°
22°
6
35°
21°
7
36°
20°
8
35°
19°
9
32°
13°
10
31°
11°
11
27°
12°
12
27°
4°
13
26°
4°
14
20°
13°
15
25°
14°
16
28°
11°
17
29°
15°
18
30°
17°
19
32°
19°
20
34°
14°
21
34°
11°
22
28°
15°
23
31°
16°
24
31°
7°
25
32°
4°
26
22°
1°
27
19°
-4°
28
18°
0°
29
15°
-6°
30
17°
-4°
31
12°
-3°
1
14°
10°
2
20°
-1°
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 12° to 36°, with overnight lows between -6° and 22°. The average high for December is 28° with an average low of 11°. 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.
