S
M
T
W
T
F
S
29
48°
37°
30
51°
33°
1
49°
27°
2
46°
23°
3
37°
26°
4
39°
31°
5
40°
26°
6
40°
24°
7
36°
31°
8
42°
26°
9
44°
23°
10
37°
20°
11
32°
17°
12
30°
20°
13
30°
18°
14
32°
15°
15
30°
16°
16
28°
16°
17
31°
15°
18
33°
12°
19
32°
11°
20
26°
17°
21
29°
22°
22
34°
24°
23
33°
21°
24
32°
25°
25
40°
25°
26
41°
20°
27
38°
23°
28
Hist. Avg.
33°
19°
29
Hist. Avg.
33°
18°
30
Hist. Avg.
33°
18°
31
Hist. Avg.
32°
18°
1
Hist. Avg.
32°
18°
2
Hist. Avg.
32°
17°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Ithaca
Ithaca's December 2026 forecast shows daily high temperatures ranging from 26° to 51°, with overnight lows between 11° and 37°. The average high for December is 37° with an average low of 22°. 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 Ithaca. See also: January | February | March.
