S
M
T
W
T
F
S
29
48°
28°
30
46°
28°
1
49°
35°
2
51°
23°
3
50°
22°
4
44°
24°
5
44°
25°
6
43°
22°
7
44°
20°
8
43°
18°
9
42°
18°
10
40°
17°
11
38°
17°
12
39°
19°
13
41°
21°
14
41°
21°
15
42°
23°
16
42°
26°
17
43°
26°
18
42°
32°
19
45°
26°
20
50°
28°
21
49°
31°
22
50°
27°
23
45°
20°
24
44°
26°
25
40°
25°
26
43°
21°
27
43°
24°
28
45°
25°
29
48°
24°
30
43°
15°
31
42°
17°
1
37°
18°
2
Hist. Avg.
45°
24°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Dennis
Dennis's December 2026 forecast shows daily high temperatures ranging from 37° to 51°, with overnight lows between 15° and 35°. The average high for December is 44° with an average low of 23°. 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 Dennis. See also: January | February | March.
