S
M
T
W
T
F
S
29
70°
41°
30
67°
41°
1
64°
43°
2
65°
42°
3
66°
42°
4
65°
43°
5
65°
45°
6
66°
44°
7
68°
43°
8
67°
47°
9
66°
47°
10
66°
48°
11
69°
48°
12
70°
47°
13
70°
47°
14
69°
46°
15
70°
48°
16
70°
48°
17
69°
45°
18
67°
42°
19
63°
47°
20
66°
47°
21
66°
46°
22
63°
45°
23
64°
47°
24
63°
46°
25
65°
43°
26
63°
44°
27
65°
45°
28
64°
42°
29
63°
41°
30
63°
43°
31
63°
44°
1
Hist. Avg.
68°
42°
2
Hist. Avg.
68°
42°
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 63° to 70°, with overnight lows between 41° and 48°. The average high for December is 66° with an average low of 45°. 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.
