S
M
T
W
T
F
S
29
66°
43°
30
67°
49°
1
64°
50°
2
66°
47°
3
66°
46°
4
73°
49°
5
72°
48°
6
68°
44°
7
69°
43°
8
69°
46°
9
65°
41°
10
61°
44°
11
61°
49°
12
62°
48°
13
61°
38°
14
62°
39°
15
61°
40°
16
64°
46°
17
68°
46°
18
70°
47°
19
70°
44°
20
68°
38°
21
62°
37°
22
59°
38°
23
60°
37°
24
60°
37°
25
61°
38°
26
61°
37°
27
62°
38°
28
62°
38°
29
60°
36°
30
60°
36°
31
61°
37°
1
62°
38°
2
63°
40°
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 59° to 73°, with overnight lows between 36° and 50°. The average high for December is 64° with an average low of 42°. 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.
