S
M
T
W
T
F
S
29
51°
42°
30
62°
42°
1
59°
44°
2
62°
42°
3
57°
38°
4
55°
35°
5
60°
38°
6
59°
38°
7
50°
36°
8
47°
33°
9
48°
31°
10
48°
27°
11
46°
26°
12
46°
27°
13
48°
26°
14
49°
26°
15
48°
30°
16
47°
36°
17
49°
38°
18
55°
36°
19
56°
26°
20
51°
23°
21
46°
23°
22
43°
26°
23
47°
29°
24
45°
25°
25
45°
24°
26
43°
24°
27
44°
25°
28
44°
24°
29
46°
28°
30
48°
32°
31
55°
26°
1
53°
22°
2
44°
20°
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 43° to 62°, with overnight lows between 20° and 44°. The average high for December is 50° with an average low of 31°. 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.
