S
M
T
W
T
F
S
27
67°
30°
28
76°
43°
29
80°
39°
30
59°
30°
1
67°
44°
2
59°
43°
3
54°
41°
4
60°
36°
5
66°
48°
6
60°
52°
7
75°
44°
8
53°
32°
9
67°
28°
10
74°
44°
11
70°
37°
12
82°
38°
13
74°
60°
14
79°
61°
15
85°
57°
16
82°
55°
17
61°
51°
18
59°
45°
19
56°
39°
20
55°
37°
21
50°
46°
22
58°
41°
23
55°
36°
24
61°
38°
25
67°
35°
26
72°
38°
27
74°
47°
28
66°
52°
29
72°
54°
30
74°
49°
31
64°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Ithaca
Ithaca's May 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for May 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 May weather will actually feel in Ithaca. See also: June | July | August.