S
M
T
W
T
F
S
29
64°
39°
30
57°
39°
1
57°
36°
2
58°
38°
3
59°
39°
4
57°
41°
5
57°
41°
6
59°
40°
7
59°
46°
8
60°
45°
9
58°
47°
10
59°
48°
11
62°
47°
12
62°
44°
13
61°
44°
14
60°
45°
15
61°
45°
16
62°
44°
17
61°
42°
18
57°
44°
19
54°
44°
20
53°
45°
21
60°
40°
22
60°
45°
23
56°
46°
24
59°
45°
25
61°
44°
26
57°
45°
27
57°
42°
28
58°
41°
29
56°
38°
30
54°
46°
31
55°
39°
1
51°
42°
2
Hist. Avg.
56°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Alamo
Alamo's December 2026 forecast shows daily high temperatures ranging from 51° to 64°, with overnight lows between 36° and 48°. The average high for December is 58° with an average low of 43°. 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 Alamo. See also: January | February | March.
