S
M
T
W
T
F
S
26
66°
39°
27
71°
42°
28
61°
46°
29
51°
41°
30
54°
34°
1
46°
31°
2
50°
36°
3
57°
43°
4
70°
48°
5
54°
37°
6
52°
39°
7
50°
36°
8
55°
38°
9
58°
39°
10
61°
41°
11
60°
42°
12
59°
42°
13
61°
45°
14
63°
46°
15
65°
45°
16
71°
52°
17
70°
50°
18
64°
48°
19
69°
52°
20
67°
51°
21
69°
43°
22
64°
42°
23
62°
43°
24
64°
43°
25
64°
44°
26
65°
44°
27
65°
45°
28
66°
44°
29
66°
45°
30
67°
53°
31
72°
51°
1
68°
50°
2
70°
51°
3
73°
56°
4
75°
56°
5
77°
57°
6
76°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Ithaca
Ithaca's May 2026 forecast shows daily high temperatures ranging from 50° to 77°, with overnight lows between 36° and 59°. The average high for May is 64° with an average low of 46°. 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.
