S
M
T
W
T
F
S
29
51°
30°
30
52°
32°
1
53°
38°
2
53°
41°
3
54°
43°
4
53°
43°
5
52°
42°
6
53°
43°
7
54°
40°
8
52°
34°
9
50°
31°
10
51°
31°
11
66°
42°
12
67°
29°
13
67°
27°
14
48°
29°
15
50°
28°
16
51°
26°
17
49°
30°
18
52°
44°
19
62°
44°
20
64°
43°
21
67°
35°
22
65°
42°
23
64°
44°
24
65°
27°
25
67°
26°
26
52°
26°
27
49°
29°
28
54°
40°
29
59°
42°
30
63°
43°
31
64°
45°
1
65°
40°
2
65°
29°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Valley
Valley's December 2026 forecast shows daily high temperatures ranging from 48° to 67°, with overnight lows between 26° and 45°. The average high for December is 57° with an average low of 36°. 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 Valley. See also: January | February | March.
