S
M
T
W
T
F
S
29
50°
38°
30
51°
37°
1
52°
36°
2
52°
34°
3
40°
35°
4
45°
31°
5
49°
35°
6
48°
34°
7
40°
27°
8
37°
24°
9
35°
22°
10
36°
26°
11
37°
34°
12
41°
29°
13
41°
26°
14
35°
20°
15
35°
25°
16
36°
28°
17
40°
29°
18
41°
28°
19
40°
22°
20
38°
20°
21
33°
18°
22
32°
23°
23
34°
28°
24
36°
25°
25
36°
17°
26
34°
13°
27
31°
16°
28
30°
15°
29
31°
13°
30
31°
23°
31
36°
18°
1
37°
14°
2
31°
10°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Dayton
Dayton's December 2026 forecast shows daily high temperatures ranging from 30° to 52°, with overnight lows between 10° and 38°. The average high for December is 39° with an average low of 25°. 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 Dayton. See also: January | February | March.
