S
M
T
W
T
F
S
29
74°
56°
30
78°
53°
1
78°
51°
2
73°
47°
3
66°
48°
4
66°
45°
5
62°
43°
6
63°
44°
7
65°
46°
8
67°
47°
9
64°
47°
10
65°
45°
11
62°
42°
12
62°
37°
13
61°
36°
14
62°
41°
15
63°
42°
16
62°
42°
17
61°
40°
18
62°
42°
19
63°
41°
20
64°
41°
21
64°
42°
22
65°
45°
23
67°
43°
24
65°
39°
25
61°
38°
26
60°
38°
27
60°
40°
28
62°
42°
29
65°
41°
30
66°
42°
31
67°
41°
1
66°
40°
2
65°
41°
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 78°, with overnight lows between 36° and 56°. The average high for December is 65° 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.
