S
M
T
W
T
F
S
30
101°
76°
31
101°
72°
1
99°
73°
2
86°
76°
3
94°
75°
4
98°
71°
5
93°
74°
6
96°
73°
7
98°
76°
8
98°
75°
9
96°
75°
10
98°
76°
11
97°
74°
12
99°
73°
13
98°
72°
14
97°
71°
15
95°
70°
16
92°
70°
17
93°
69°
18
93°
68°
19
91°
64°
20
87°
63°
21
91°
68°
22
91°
67°
23
90°
68°
24
90°
68°
25
89°
67°
26
89°
67°
27
88°
66°
28
89°
66°
29
88°
65°
30
84°
64°
1
81°
56°
2
77°
55°
3
77°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Overton
Overton's September 2026 forecast shows daily high temperatures ranging from 77° to 99°, with overnight lows between 54° and 76°. The average high for September is 91° with an average low of 68°. 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 Overton. See also: October | November | December.