S
M
T
W
T
F
S
29
35°
20°
30
37°
23°
1
41°
28°
2
40°
25°
3
39°
26°
4
43°
30°
5
46°
21°
6
33°
18°
7
32°
23°
8
42°
30°
9
44°
27°
10
39°
28°
11
41°
29°
12
42°
26°
13
36°
20°
14
30°
16°
15
29°
15°
16
28°
17°
17
30°
20°
18
34°
25°
19
40°
25°
20
38°
27°
21
42°
26°
22
34°
21°
23
33°
21°
24
39°
25°
25
26°
13°
26
28°
16°
27
28°
17°
28
29°
24°
29
42°
19°
30
41°
18°
31
31°
17°
1
31°
14°
2
33°
11°
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 26° to 46°, with overnight lows between 11° and 30°. The average high for December is 36° with an average low of 22°. 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.
