S
M
T
W
T
F
S
29
65°
44°
30
64°
44°
1
64°
43°
2
63°
46°
3
63°
50°
4
64°
52°
5
63°
48°
6
63°
47°
7
73°
44°
8
70°
44°
9
68°
42°
10
67°
41°
11
68°
44°
12
67°
43°
13
69°
44°
14
69°
45°
15
70°
50°
16
69°
47°
17
65°
49°
18
65°
48°
19
63°
50°
20
63°
52°
21
66°
49°
22
67°
46°
23
63°
46°
24
62°
48°
25
64°
49°
26
68°
49°
27
70°
50°
28
71°
51°
29
73°
43°
30
68°
42°
31
65°
43°
1
68°
44°
2
68°
42°
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 62° to 73°, with overnight lows between 41° and 52°. The average high for December is 67° with an average low of 46°. 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.
