S
M
T
W
T
F
S
30
86°
68°
31
85°
69°
1
84°
68°
2
85°
65°
3
83°
64°
4
82°
63°
5
83°
62°
6
84°
62°
7
84°
63°
8
87°
63°
9
86°
64°
10
86°
62°
11
85°
63°
12
86°
66°
13
87°
66°
14
87°
65°
15
86°
66°
16
85°
66°
17
86°
64°
18
84°
64°
19
83°
63°
20
82°
64°
21
83°
63°
22
83°
63°
23
79°
62°
24
Hist. Avg.
81°
60°
25
Hist. Avg.
80°
60°
26
Hist. Avg.
80°
59°
27
Hist. Avg.
80°
59°
28
Hist. Avg.
79°
59°
29
Hist. Avg.
79°
58°
30
Hist. Avg.
79°
58°
1
Hist. Avg.
78°
57°
2
Hist. Avg.
78°
57°
3
Hist. Avg.
78°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Stone Mountain
Stone Mountain's September 2026 forecast shows daily high temperatures ranging from 79° to 87°, with overnight lows between 62° and 69°. The average high for September is 84° with an average low of 64°. 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 Stone Mountain. See also: October | November | December.
