S
M
T
W
T
F
S
29
66°
47°
30
66°
45°
1
68°
47°
2
70°
45°
3
69°
47°
4
69°
49°
5
72°
51°
6
73°
52°
7
76°
54°
8
75°
51°
9
74°
46°
10
65°
44°
11
62°
42°
12
63°
42°
13
Hist. Avg.
66°
45°
14
Hist. Avg.
66°
45°
15
Hist. Avg.
66°
45°
16
Hist. Avg.
65°
45°
17
Hist. Avg.
65°
45°
18
Hist. Avg.
65°
44°
19
Hist. Avg.
65°
44°
20
Hist. Avg.
65°
44°
21
Hist. Avg.
65°
44°
22
Hist. Avg.
65°
44°
23
Hist. Avg.
65°
44°
24
Hist. Avg.
65°
44°
25
Hist. Avg.
65°
44°
26
Hist. Avg.
65°
44°
27
Hist. Avg.
65°
44°
28
Hist. Avg.
65°
44°
29
Hist. Avg.
65°
44°
30
Hist. Avg.
66°
45°
31
Hist. Avg.
66°
45°
1
Hist. Avg.
66°
45°
2
Hist. Avg.
66°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Phoenix
Phoenix's December 2026 forecast shows daily high temperatures ranging from 62° to 76°, with overnight lows between 42° and 54°. The average high for December is 69° with an average low of 47°. 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 Phoenix. See also: January | February | March.
