S
M
T
W
T
F
S
30
93°
72°
31
94°
71°
1
92°
70°
2
92°
71°
3
93°
71°
4
90°
70°
5
89°
70°
6
89°
69°
7
88°
68°
8
89°
70°
9
91°
68°
10
88°
69°
11
88°
68°
12
91°
69°
13
92°
69°
14
90°
63°
15
88°
64°
16
86°
63°
17
87°
64°
18
89°
65°
19
91°
65°
20
91°
67°
21
90°
67°
22
87°
66°
23
89°
66°
24
88°
63°
25
86°
62°
26
88°
62°
27
87°
64°
28
88°
64°
29
89°
65°
30
89°
64°
1
88°
64°
2
89°
63°
3
89°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Oak Grove
Oak Grove's September 2026 forecast shows daily high temperatures ranging from 86° to 94°, with overnight lows between 62° and 72°. The average high for September is 89° with an average low of 67°. 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 Oak Grove. See also: October | November | December.