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