S
M
T
W
T
F
S
29
71°
48°
30
69°
51°
1
67°
52°
2
64°
49°
3
65°
44°
4
65°
46°
5
63°
42°
6
62°
41°
7
63°
41°
8
64°
42°
9
69°
43°
10
69°
43°
11
68°
46°
12
67°
50°
13
64°
42°
14
63°
43°
15
68°
44°
16
70°
45°
17
70°
46°
18
69°
47°
19
64°
50°
20
63°
50°
21
66°
48°
22
61°
42°
23
61°
41°
24
64°
40°
25
65°
47°
26
64°
46°
27
60°
43°
28
66°
42°
29
65°
40°
30
65°
38°
31
64°
38°
1
61°
37°
2
61°
36°
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 71°, with overnight lows between 36° and 52°. 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.
