S
M
T
W
T
F
S
30
91°
76°
31
88°
75°
1
88°
75°
2
89°
74°
3
88°
74°
4
89°
75°
5
89°
74°
6
91°
75°
7
92°
74°
8
91°
75°
9
91°
74°
10
90°
75°
11
90°
75°
12
91°
76°
13
91°
75°
14
90°
76°
15
89°
76°
16
89°
75°
17
90°
74°
18
88°
73°
19
88°
74°
20
89°
76°
21
87°
74°
22
88°
74°
23
88°
73°
24
89°
72°
25
88°
71°
26
89°
72°
27
88°
71°
28
90°
74°
29
89°
75°
30
87°
74°
1
88°
74°
2
Hist. Avg.
88°
72°
3
Hist. Avg.
88°
72°
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 87° to 92°, with overnight lows between 71° and 76°. The average high for September is 89° with an average low of 74°. 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.
