S
M
T
W
T
F
S
30
103°
77°
31
88°
74°
1
97°
76°
2
100°
83°
3
100°
83°
4
100°
83°
5
100°
80°
6
104°
80°
7
107°
80°
8
105°
82°
9
104°
88°
10
105°
86°
11
103°
87°
12
101°
79°
13
101°
84°
14
103°
82°
15
98°
82°
16
93°
75°
17
91°
78°
18
100°
78°
19
101°
75°
20
99°
77°
21
99°
76°
22
99°
75°
23
99°
78°
24
102°
77°
25
101°
78°
26
100°
75°
27
98°
73°
28
99°
74°
29
100°
68°
30
93°
74°
1
94°
74°
2
96°
74°
3
95°
73°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Deer Valley
Deer Valley's September 2026 forecast shows daily high temperatures ranging from 91° to 102°, with overnight lows between 68° and 78°. The average high for September is 98° with an average low of 75°. 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 Deer Valley. See also: October | November | December.
