S
M
T
W
T
F
S
26
57°
44°
27
63°
38°
28
63°
32°
29
66°
31°
30
67°
32°
1
66°
35°
2
72°
39°
3
73°
44°
4
73°
42°
5
63°
41°
6
67°
42°
7
74°
48°
8
75°
49°
9
78°
52°
10
75°
48°
11
76°
51°
12
78°
48°
13
79°
51°
14
72°
41°
15
68°
45°
16
67°
45°
17
68°
44°
18
68°
45°
19
69°
46°
20
69°
42°
21
68°
40°
22
70°
43°
23
73°
47°
24
69°
41°
25
68°
39°
26
68°
40°
27
70°
39°
28
72°
44°
29
78°
48°
30
81°
50°
31
79°
50°
1
74°
49°
2
77°
49°
3
80°
48°
4
81°
50°
5
82°
51°
6
79°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Cortez
Cortez's May 2026 forecast shows daily high temperatures ranging from 63° to 82°, with overnight lows between 35° and 52°. The average high for May is 73° with an average low of 45°. 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 Cortez. See also: June | July | August.