S
M
T
W
T
F
S
26
58°
35°
27
73°
33°
28
64°
50°
29
56°
45°
30
50°
39°
1
51°
31°
2
46°
35°
3
55°
33°
4
73°
41°
5
74°
45°
6
48°
42°
7
53°
32°
8
54°
33°
9
58°
43°
10
61°
33°
11
56°
30°
12
60°
27°
13
67°
43°
14
48°
41°
15
65°
40°
16
80°
39°
17
84°
49°
18
91°
59°
19
87°
60°
20
74°
47°
21
58°
40°
22
65°
34°
23
57°
47°
24
59°
48°
25
71°
49°
26
82°
48°
27
78°
50°
28
63°
44°
29
70°
44°
30
61°
40°
31
69°
46°
1
68°
43°
2
69°
46°
3
72°
49°
4
76°
55°
5
79°
57°
6
73°
58°
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 61° to 79°, with overnight lows between 40° and 58°. The average high for May is 71° with an average low of 49°. 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.
