S
M
T
W
T
F
S
29
55°
37°
30
50°
34°
1
45°
35°
2
45°
37°
3
47°
34°
4
49°
30°
5
45°
34°
6
44°
36°
7
45°
28°
8
47°
25°
9
43°
24°
10
39°
23°
11
38°
31°
12
49°
28°
13
43°
32°
14
46°
35°
15
Hist. Avg.
44°
29°
16
Hist. Avg.
44°
29°
17
Hist. Avg.
43°
28°
18
Hist. Avg.
43°
28°
19
Hist. Avg.
43°
28°
20
Hist. Avg.
43°
28°
21
Hist. Avg.
42°
27°
22
Hist. Avg.
42°
27°
23
Hist. Avg.
42°
27°
24
Hist. Avg.
42°
26°
25
Hist. Avg.
42°
26°
26
Hist. Avg.
41°
26°
27
Hist. Avg.
41°
26°
28
Hist. Avg.
41°
26°
29
Hist. Avg.
41°
25°
30
Hist. Avg.
41°
25°
31
Hist. Avg.
40°
25°
1
Hist. Avg.
40°
24°
2
Hist. Avg.
40°
24°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Dennis
Dennis's December 2026 forecast shows daily high temperatures ranging from 38° to 55°, with overnight lows between 23° and 37°. The average high for December is 46° with an average low of 31°. 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.
