S
M
T
W
T
F
S
30
25°
15°
1
24°
12°
2
24°
12°
3
24°
9°
4
21°
2°
5
32°
8°
6
31°
8°
7
31°
14°
8
37°
14°
9
43°
14°
10
40°
26°
11
28°
22°
12
28°
22°
13
20°
0°
14
6°
-2°
15
23°
6°
16
39°
13°
17
43°
13°
18
44°
13°
19
35°
9°
20
42°
20°
21
42°
20°
22
45°
33°
23
50°
29°
24
41°
38°
25
46°
41°
26
51°
38°
27
50°
40°
28
60°
15°
29
23°
11°
30
32°
11°
31
38°
13°
1
25°
13°
2
26°
22°
3
31°
22°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Seneca
Seneca's December 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for December is ° with an average low of °. 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 Seneca. See also: January | February | March.
