S
M
T
W
T
F
S
26
75°
39°
27
77°
43°
28
79°
46°
29
79°
45°
30
64°
46°
1
64°
43°
2
71°
45°
3
75°
48°
4
71°
55°
5
63°
54°
6
63°
51°
7
69°
49°
8
69°
51°
9
72°
53°
10
75°
55°
11
74°
54°
12
74°
52°
13
71°
52°
14
72°
50°
15
67°
48°
16
71°
53°
17
72°
52°
18
69°
48°
19
68°
49°
20
67°
48°
21
68°
49°
22
68°
49°
23
69°
52°
24
69°
55°
25
71°
55°
26
70°
53°
27
70°
50°
28
72°
52°
29
74°
54°
30
75°
55°
31
76°
56°
1
76°
56°
2
75°
57°
3
76°
57°
4
77°
56°
5
78°
57°
6
78°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Cortona
Cortona's May 2026 forecast shows daily high temperatures ranging from 63° to 78°, with overnight lows between 45° and 58°. The average high for May is 72° with an average low of 52°. 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 Cortona. See also: June | July | August.