S
M
T
W
T
F
S
29
51°
31°
30
50°
33°
1
49°
39°
2
51°
42°
3
57°
45°
4
59°
45°
5
57°
47°
6
62°
38°
7
66°
35°
8
52°
38°
9
48°
43°
10
53°
43°
11
56°
41°
12
61°
45°
13
62°
47°
14
64°
38°
15
63°
29°
16
51°
29°
17
50°
30°
18
52°
34°
19
48°
36°
20
47°
41°
21
50°
38°
22
60°
35°
23
54°
32°
24
48°
31°
25
47°
34°
26
54°
38°
27
52°
34°
28
53°
28°
29
48°
28°
30
45°
29°
31
44°
24°
1
44°
22°
2
43°
24°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Denison
Denison's December 2026 forecast shows daily high temperatures ranging from 43° to 66°, with overnight lows between 22° and 47°. The average high for December is 53° with an average low of 36°. 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 Denison. See also: January | February | March.
