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
82°
57°
8
90°
55°
9
92°
51°
10
94°
55°
11
91°
56°
12
88°
62°
13
83°
61°
14
84°
56°
15
85°
58°
16
79°
59°
17
83°
58°
18
80°
59°
19
81°
57°
20
79°
46°
21
73°
51°
22
72°
49°
23
72°
47°
24
74°
48°
25
71°
47°
26
73°
49°
27
72°
48°
28
69°
42°
29
69°
38°
30
65°
36°
1
66°
36°
2
67°
37°
3
67°
37°
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 65° to 94°, with overnight lows between 36° and 62°. The average high for September is 78° with an average low of 50°. 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.
