S
M
T
W
T
F
S
29
45°
33°
30
44°
38°
1
54°
35°
2
54°
37°
3
46°
38°
4
55°
29°
5
56°
30°
6
40°
29°
7
42°
32°
8
43°
28°
9
43°
25°
10
40°
24°
11
36°
25°
12
37°
25°
13
38°
26°
14
39°
25°
15
38°
27°
16
38°
29°
17
39°
29°
18
39°
34°
19
40°
36°
20
43°
33°
21
43°
29°
22
40°
26°
23
38°
26°
24
37°
30°
25
37°
31°
26
41°
30°
27
37°
30°
28
39°
28°
29
37°
26°
30
39°
26°
31
42°
19°
1
Hist. Avg.
36°
21°
2
Hist. Avg.
36°
21°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Westbrook
Westbrook's December 2026 forecast shows daily high temperatures ranging from 36° to 56°, with overnight lows between 19° and 38°. The average high for December is 42° with an average low of 29°. 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 Westbrook. See also: January | February | March.
