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