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