S
M
T
W
T
F
S
26
61°
34°
27
69°
46°
28
63°
48°
29
61°
43°
30
48°
33°
1
45°
33°
2
45°
34°
3
47°
35°
4
53°
37°
5
56°
41°
6
58°
43°
7
57°
43°
8
58°
40°
9
56°
42°
10
60°
41°
11
61°
42°
12
65°
49°
13
64°
43°
14
58°
39°
15
58°
39°
16
59°
43°
17
60°
42°
18
61°
44°
19
70°
45°
20
61°
43°
21
61°
42°
22
62°
43°
23
62°
42°
24
63°
49°
25
67°
49°
26
64°
44°
27
62°
44°
28
64°
45°
29
68°
51°
30
74°
50°
31
68°
46°
1
70°
50°
2
75°
55°
3
76°
56°
4
76°
51°
5
67°
47°
6
67°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Cortland
Cortland's May 2026 forecast shows daily high temperatures ranging from 45° to 76°, with overnight lows between 33° and 56°. The average high for May is 62° with an average low of 44°. 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 Cortland. See also: June | July | August.
