S
M
T
W
T
F
S
29
65°
43°
30
68°
51°
1
64°
43°
2
63°
46°
3
62°
41°
4
62°
41°
5
63°
42°
6
62°
41°
7
61°
41°
8
61°
42°
9
65°
43°
10
67°
42°
11
68°
49°
12
66°
42°
13
59°
39°
14
59°
39°
15
60°
40°
16
59°
39°
17
60°
39°
18
65°
41°
19
67°
43°
20
69°
48°
21
62°
41°
22
61°
39°
23
63°
39°
24
62°
41°
25
60°
40°
26
63°
42°
27
61°
42°
28
65°
43°
29
64°
41°
30
65°
40°
31
66°
42°
1
65°
41°
2
66°
44°
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 69°, with overnight lows between 39° and 51°. The average high for December is 63° 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.
