S
M
T
W
T
F
S
29
48°
37°
30
53°
38°
1
54°
39°
2
53°
37°
3
55°
36°
4
47°
31°
5
51°
34°
6
52°
35°
7
48°
32°
8
42°
29°
9
41°
26°
10
39°
26°
11
39°
32°
12
41°
30°
13
42°
28°
14
36°
21°
15
39°
23°
16
40°
28°
17
41°
29°
18
38°
30°
19
45°
26°
20
42°
17°
21
37°
18°
22
35°
20°
23
33°
24°
24
35°
23°
25
44°
25°
26
38°
19°
27
36°
15°
28
33°
14°
29
33°
12°
30
35°
29°
31
45°
24°
1
51°
18°
2
37°
16°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Westminster
Westminster's December 2026 forecast shows daily high temperatures ranging from 33° to 55°, with overnight lows between 12° and 39°. The average high for December is 42° with an average low of 26°. 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 Westminster. See also: January | February | March.
