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