S
M
T
W
T
F
S
29
33°
15°
30
31°
14°
1
32°
24°
2
36°
27°
3
33°
24°
4
33°
17°
5
31°
14°
6
32°
14°
7
33°
15°
8
35°
14°
9
33°
13°
10
35°
16°
11
38°
13°
12
37°
15°
13
38°
18°
14
35°
24°
15
34°
14°
16
36°
22°
17
30°
19°
18
34°
20°
19
35°
24°
20
35°
13°
21
33°
15°
22
32°
20°
23
33°
11°
24
33°
23°
25
31°
17°
26
36°
9°
27
32°
9°
28
22°
18°
29
27°
10°
30
29°
20°
31
27°
21°
1
33°
22°
2
34°
17°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Mesa
Mesa's December 2026 forecast shows daily high temperatures ranging from 22° to 38°, with overnight lows between 9° and 27°. The average high for December is 33° with an average low of 17°. 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.
