S
M
T
W
T
F
S
29
69°
40°
30
66°
38°
1
69°
39°
2
70°
38°
3
68°
38°
4
69°
40°
5
73°
39°
6
70°
37°
7
67°
38°
8
67°
33°
9
62°
34°
10
64°
36°
11
68°
37°
12
70°
40°
13
71°
42°
14
72°
35°
15
62°
35°
16
62°
34°
17
64°
33°
18
64°
36°
19
66°
35°
20
67°
43°
21
67°
34°
22
62°
32°
23
61°
35°
24
64°
33°
25
64°
34°
26
63°
45°
27
64°
45°
28
Hist. Avg.
62°
39°
29
Hist. Avg.
63°
39°
30
Hist. Avg.
63°
39°
31
Hist. Avg.
63°
39°
1
Hist. Avg.
63°
39°
2
Hist. Avg.
63°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Mesa
Mesa's December 2026 forecast shows daily high temperatures ranging from 61° to 73°, with overnight lows between 32° and 45°. The average high for December is 66° with an average low of 37°. 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 Mesa. See also: January | February | March.
