S
M
T
W
T
F
S
30
100°
60°
31
100°
71°
1
101°
72°
2
102°
81°
3
101°
74°
4
102°
75°
5
104°
72°
6
101°
67°
7
94°
63°
8
98°
71°
9
101°
72°
10
94°
70°
11
87°
67°
12
93°
70°
13
92°
67°
14
89°
66°
15
95°
69°
16
92°
66°
17
91°
67°
18
80°
58°
19
82°
63°
20
85°
62°
21
86°
64°
22
85°
63°
23
85°
63°
24
84°
62°
25
85°
63°
26
84°
63°
27
84°
62°
28
83°
63°
29
83°
62°
30
82°
60°
1
79°
54°
2
70°
50°
3
70°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Ash Flat
Ash Flat's September 2026 forecast shows daily high temperatures ranging from 70° to 104°, with overnight lows between 49° and 72°. The average high for September is 88° with an average low of 64°. 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 Ash Flat. See also: October | November | December.