S
M
T
W
T
F
S
29
63°
43°
30
75°
44°
1
66°
43°
2
66°
44°
3
68°
46°
4
70°
45°
5
71°
43°
6
70°
42°
7
64°
45°
8
68°
45°
9
71°
46°
10
70°
45°
11
70°
44°
12
69°
44°
13
69°
45°
14
72°
45°
15
71°
44°
16
71°
44°
17
70°
45°
18
72°
47°
19
73°
47°
20
74°
46°
21
73°
40°
22
66°
39°
23
61°
40°
24
62°
47°
25
66°
51°
26
68°
46°
27
61°
42°
28
60°
38°
29
60°
38°
30
61°
39°
31
61°
39°
1
62°
38°
2
62°
42°
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 60° to 75°, with overnight lows between 38° and 51°. The average high for December is 67° 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.
