S
M
T
W
T
F
S
30
86°
60°
31
67°
55°
1
79°
48°
2
81°
50°
3
82°
50°
4
84°
52°
5
85°
53°
6
87°
47°
7
83°
55°
8
87°
50°
9
90°
48°
10
89°
43°
11
89°
54°
12
91°
58°
13
87°
57°
14
80°
54°
15
81°
54°
16
78°
59°
17
85°
58°
18
84°
59°
19
81°
57°
20
79°
58°
21
79°
56°
22
77°
56°
23
76°
55°
24
77°
44°
25
70°
40°
26
72°
49°
27
75°
49°
28
70°
48°
29
69°
44°
30
70°
44°
1
73°
43°
2
74°
44°
3
76°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Cortez
Cortez's September 2026 forecast shows daily high temperatures ranging from 69° to 91°, with overnight lows between 40° and 59°. The average high for September is 78° 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 September weather will actually feel in Cortez. See also: October | November | December.
