S
M
T
W
T
F
S
30
86°
64°
31
88°
66°
1
87°
65°
2
87°
65°
3
86°
64°
4
87°
65°
5
87°
65°
6
86°
64°
7
85°
63°
8
80°
63°
9
79°
64°
10
78°
63°
11
84°
62°
12
84°
63°
13
85°
63°
14
84°
62°
15
84°
62°
16
77°
58°
17
77°
53°
18
76°
57°
19
80°
52°
20
75°
52°
21
73°
53°
22
73°
53°
23
74°
57°
24
80°
58°
25
80°
59°
26
79°
57°
27
80°
58°
28
78°
54°
29
77°
53°
30
78°
53°
1
77°
52°
2
78°
54°
3
71°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Mountain Grove
Mountain Grove's September 2026 forecast shows daily high temperatures ranging from 71° to 88°, with overnight lows between 47° and 66°. The average high for September is 81° 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 Mountain Grove. See also: October | November | December.
