S
M
T
W
T
F
S
29
71°
46°
30
71°
49°
1
70°
46°
2
67°
46°
3
71°
47°
4
71°
44°
5
70°
50°
6
70°
44°
7
67°
46°
8
68°
43°
9
70°
44°
10
69°
43°
11
68°
41°
12
66°
40°
13
65°
41°
14
67°
43°
15
69°
44°
16
70°
45°
17
70°
51°
18
69°
40°
19
62°
45°
20
61°
41°
21
59°
38°
22
59°
39°
23
60°
43°
24
60°
43°
25
60°
45°
26
60°
45°
27
61°
42°
28
64°
38°
29
61°
39°
30
62°
40°
31
64°
42°
1
65°
44°
2
69°
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 59° to 71°, with overnight lows between 38° and 51°. The average high for December is 66° with an average low of 44°. 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.
