S
M
T
W
T
F
S
29
77°
59°
30
80°
55°
1
80°
52°
2
77°
57°
3
73°
52°
4
79°
48°
5
72°
49°
6
70°
56°
7
74°
57°
8
77°
56°
9
77°
58°
10
78°
56°
11
80°
58°
12
66°
52°
13
68°
53°
14
Hist. Avg.
74°
54°
15
Hist. Avg.
74°
54°
16
Hist. Avg.
74°
54°
17
Hist. Avg.
74°
54°
18
Hist. Avg.
73°
54°
19
Hist. Avg.
73°
54°
20
Hist. Avg.
73°
53°
21
Hist. Avg.
73°
53°
22
Hist. Avg.
73°
53°
23
Hist. Avg.
73°
53°
24
Hist. Avg.
73°
53°
25
Hist. Avg.
72°
53°
26
Hist. Avg.
72°
53°
27
Hist. Avg.
72°
53°
28
Hist. Avg.
72°
53°
29
Hist. Avg.
72°
52°
30
Hist. Avg.
72°
52°
31
Hist. Avg.
72°
52°
1
Hist. Avg.
72°
52°
2
Hist. Avg.
72°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Mission
Mission's December 2026 forecast shows daily high temperatures ranging from 66° to 80°, with overnight lows between 48° and 59°. The average high for December is 75° with an average low of 55°. 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 Mission. See also: January | February | March.
