S
M
T
W
T
F
S
29
62°
42°
30
62°
42°
1
63°
41°
2
62°
40°
3
61°
41°
4
62°
41°
5
63°
43°
6
62°
49°
7
61°
47°
8
61°
44°
9
60°
41°
10
61°
41°
11
61°
43°
12
63°
46°
13
59°
40°
14
58°
38°
15
58°
38°
16
59°
39°
17
60°
40°
18
67°
45°
19
68°
44°
20
68°
45°
21
69°
44°
22
70°
45°
23
69°
43°
24
68°
43°
25
67°
41°
26
67°
41°
27
68°
42°
28
68°
41°
29
67°
43°
30
67°
44°
31
66°
46°
1
67°
50°
2
66°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Phoenix
Phoenix's December 2026 forecast shows daily high temperatures ranging from 58° to 70°, with overnight lows between 38° and 50°. The average high for December is 64° with an average low of 43°. 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.
