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