S
M
T
W
T
F
S
30
87°
70°
31
89°
69°
1
86°
69°
2
84°
68°
3
84°
69°
4
83°
69°
5
83°
66°
6
84°
66°
7
84°
68°
8
83°
66°
9
82°
63°
10
82°
67°
11
81°
62°
12
86°
62°
13
87°
66°
14
86°
60°
15
81°
59°
16
80°
60°
17
79°
59°
18
83°
60°
19
85°
59°
20
85°
60°
21
84°
63°
22
84°
64°
23
81°
63°
24
82°
59°
25
81°
60°
26
83°
61°
27
83°
59°
28
82°
61°
29
83°
61°
30
83°
62°
1
82°
61°
2
82°
61°
3
80°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Atlanta
Atlanta's September 2026 forecast shows daily high temperatures ranging from 79° to 89°, with overnight lows between 58° and 70°. The average high for September is 83° with an average low of 63°. 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 Atlanta. See also: October | November | December.
