S
M
T
W
T
F
S
29
43°
25°
30
41°
24°
1
41°
23°
2
42°
24°
3
41°
26°
4
44°
27°
5
45°
29°
6
42°
32°
7
40°
30°
8
39°
31°
9
40°
27°
10
39°
27°
11
51°
33°
12
44°
31°
13
51°
27°
14
52°
23°
15
40°
21°
16
38°
23°
17
39°
22°
18
40°
30°
19
45°
32°
20
49°
34°
21
49°
33°
22
50°
31°
23
49°
33°
24
50°
35°
25
53°
27°
26
53°
25°
27
43°
22°
28
40°
25°
29
42°
30°
30
48°
32°
31
48°
34°
1
50°
35°
2
51°
26°
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 38° to 53°, with overnight lows between 21° and 35°. The average high for December is 45° 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 Westminster. See also: January | February | March.
