S
M
T
W
T
F
S
29
34°
26°
30
39°
28°
1
36°
29°
2
37°
29°
3
39°
28°
4
38°
29°
5
38°
28°
6
42°
28°
7
41°
26°
8
37°
26°
9
35°
25°
10
36°
25°
11
39°
17°
12
31°
12°
13
28°
10°
14
27°
18°
15
31°
10°
16
32°
23°
17
34°
24°
18
33°
22°
19
35°
23°
20
36°
21°
21
35°
24°
22
36°
22°
23
37°
12°
24
34°
8°
25
27°
10°
26
24°
17°
27
30°
20°
28
31°
19°
29
36°
22°
30
36°
22°
31
38°
21°
1
36°
6°
2
36°
4°
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 24° to 42°, with overnight lows between 4° and 29°. The average high for December is 35° with an average low of 20°. 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.
