S
M
T
W
T
F
S
26
84°
69°
27
93°
71°
28
90°
67°
29
85°
69°
30
84°
74°
1
86°
75°
2
85°
71°
3
81°
66°
4
87°
67°
5
86°
68°
6
87°
70°
7
84°
71°
8
88°
74°
9
89°
74°
10
88°
77°
11
89°
76°
12
88°
76°
13
87°
74°
14
84°
75°
15
85°
75°
16
85°
74°
17
86°
75°
18
88°
73°
19
89°
72°
20
87°
71°
21
88°
72°
22
87°
71°
23
87°
73°
24
87°
73°
25
88°
71°
26
87°
72°
27
89°
70°
28
88°
72°
29
89°
73°
30
89°
74°
31
88°
74°
1
87°
73°
2
86°
74°
3
87°
74°
4
86°
73°
5
87°
74°
6
87°
74°
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 84° to 89°, with overnight lows between 70° and 75°. The average high for May is 87° with an average low of 73°. 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.