S
M
T
W
T
F
S
30
84°
61°
31
86°
62°
1
88°
62°
2
86°
61°
3
88°
65°
4
88°
59°
5
84°
64°
6
88°
64°
7
85°
63°
8
84°
63°
9
85°
64°
10
84°
63°
11
86°
62°
12
86°
63°
13
85°
63°
14
85°
62°
15
86°
63°
16
86°
62°
17
85°
55°
18
83°
57°
19
79°
55°
20
80°
54°
21
77°
54°
22
76°
55°
23
78°
57°
24
82°
55°
25
82°
58°
26
83°
57°
27
82°
58°
28
81°
56°
29
80°
55°
30
81°
55°
1
78°
53°
2
80°
55°
3
75°
51°
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 75° to 88°, with overnight lows between 51° and 65°. The average high for September is 83° with an average low of 59°. 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.