S
M
T
W
T
F
S
29
48°
39°
30
54°
38°
1
53°
40°
2
54°
38°
3
56°
38°
4
47°
35°
5
51°
36°
6
51°
36°
7
50°
33°
8
43°
31°
9
42°
27°
10
40°
27°
11
40°
31°
12
41°
30°
13
43°
29°
14
37°
22°
15
40°
24°
16
41°
31°
17
43°
32°
18
41°
34°
19
48°
27°
20
45°
19°
21
38°
19°
22
35°
21°
23
35°
26°
24
36°
26°
25
50°
27°
26
40°
21°
27
38°
19°
28
35°
18°
29
36°
19°
30
39°
33°
31
49°
25°
1
53°
19°
2
38°
16°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Belmont
Belmont's December 2026 forecast shows daily high temperatures ranging from 35° to 56°, with overnight lows between 16° and 40°. The average high for December is 44° with an average low of 28°. 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 Belmont. See also: January | February | March.
