S
M
T
W
T
F
S
30
89°
70°
31
88°
69°
1
88°
70°
2
87°
69°
3
88°
70°
4
88°
67°
5
86°
69°
6
89°
70°
7
88°
68°
8
87°
70°
9
88°
70°
10
87°
69°
11
85°
70°
12
86°
70°
13
85°
69°
14
85°
69°
15
83°
68°
16
85°
69°
17
86°
69°
18
86°
68°
19
87°
67°
20
85°
68°
21
81°
67°
22
83°
64°
23
84°
62°
24
80°
62°
25
80°
65°
26
81°
65°
27
81°
64°
28
80°
61°
29
78°
61°
30
78°
64°
1
80°
65°
2
82°
57°
3
78°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Myrtle Grove
Myrtle Grove's September 2026 forecast shows daily high temperatures ranging from 78° to 89°, with overnight lows between 57° and 70°. The average high for September is 84° 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 Myrtle Grove. See also: October | November | December.