S
M
T
W
T
F
S
29
67°
54°
30
71°
53°
1
69°
56°
2
73°
50°
3
68°
51°
4
70°
47°
5
68°
43°
6
67°
43°
7
67°
44°
8
68°
46°
9
69°
50°
10
69°
41°
11
63°
43°
12
63°
48°
13
64°
38°
14
60°
38°
15
59°
39°
16
61°
40°
17
62°
40°
18
59°
39°
19
60°
39°
20
61°
41°
21
63°
40°
22
65°
41°
23
65°
43°
24
68°
42°
25
66°
46°
26
69°
46°
27
70°
41°
28
61°
41°
29
63°
42°
30
63°
40°
31
62°
40°
1
62°
39°
2
63°
39°
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 38° and 56°. The average high for December is 65° 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.
