S
M
T
W
T
F
S
30
77°
55°
31
80°
55°
1
82°
59°
2
82°
60°
3
81°
59°
4
81°
59°
5
78°
58°
6
74°
56°
7
80°
56°
8
80°
58°
9
79°
52°
10
78°
56°
11
79°
58°
12
80°
57°
13
79°
57°
14
78°
55°
15
80°
56°
16
73°
57°
17
75°
55°
18
73°
55°
19
Hist. Avg.
73°
53°
20
Hist. Avg.
73°
53°
21
Hist. Avg.
73°
52°
22
Hist. Avg.
72°
52°
23
Hist. Avg.
72°
52°
24
Hist. Avg.
72°
51°
25
Hist. Avg.
72°
51°
26
Hist. Avg.
71°
50°
27
Hist. Avg.
71°
50°
28
Hist. Avg.
70°
50°
29
Hist. Avg.
70°
49°
30
Hist. Avg.
70°
49°
1
Hist. Avg.
70°
49°
2
Hist. Avg.
69°
48°
3
Hist. Avg.
69°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Flat Top
Flat Top's September 2026 forecast shows daily high temperatures ranging from 73° to 82°, with overnight lows between 52° and 60°. The average high for September is 78° with an average low of 57°. 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 Flat Top. See also: October | November | December.
