S
M
T
W
T
F
S
29
45°
22°
30
42°
25°
1
43°
31°
2
50°
25°
3
49°
32°
4
52°
36°
5
51°
36°
6
54°
31°
7
54°
20°
8
44°
29°
9
44°
32°
10
43°
33°
11
49°
33°
12
52°
32°
13
52°
36°
14
53°
29°
15
54°
20°
16
48°
22°
17
42°
17°
18
45°
21°
19
40°
26°
20
41°
29°
21
43°
31°
22
50°
25°
23
49°
22°
24
41°
19°
25
37°
21°
26
44°
29°
27
49°
27°
28
45°
20°
29
43°
21°
30
36°
23°
31
36°
12°
1
37°
11°
2
32°
13°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Seymour
Seymour's December 2026 forecast shows daily high temperatures ranging from 32° to 54°, with overnight lows between 11° and 36°. The average high for December is 45° 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 Seymour. See also: January | February | March.
