S
M
T
W
T
F
S
30
103°
77°
31
101°
76°
1
102°
74°
2
101°
73°
3
103°
77°
4
104°
76°
5
104°
75°
6
103°
74°
7
103°
76°
8
101°
75°
9
103°
74°
10
96°
70°
11
95°
68°
12
95°
75°
13
96°
71°
14
93°
70°
15
94°
70°
16
93°
69°
17
95°
66°
18
93°
65°
19
95°
65°
20
94°
64°
21
93°
65°
22
94°
68°
23
96°
72°
24
96°
68°
25
99°
67°
26
98°
70°
27
98°
71°
28
97°
70°
29
99°
71°
30
98°
71°
1
99°
68°
2
97°
67°
3
96°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Tortilla Flat
Tortilla Flat's September 2026 forecast shows daily high temperatures ranging from 93° to 104°, with overnight lows between 64° and 77°. The average high for September is 98° with an average low of 71°. 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 Tortilla Flat. See also: October | November | December.