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