S
M
T
W
T
F
S
30
71°
63°
31
82°
66°
1
77°
64°
2
82°
59°
3
79°
60°
4
75°
55°
5
78°
52°
6
77°
52°
7
78°
55°
8
76°
60°
9
79°
53°
10
69°
50°
11
72°
48°
12
71°
49°
13
73°
55°
14
75°
53°
15
76°
53°
16
75°
45°
17
71°
50°
18
69°
50°
19
72°
51°
20
74°
51°
21
74°
50°
22
72°
49°
23
67°
48°
24
70°
49°
25
72°
49°
26
71°
48°
27
62°
46°
28
60°
46°
29
61°
42°
30
59°
41°
1
58°
44°
2
58°
46°
3
62°
45°
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 58° to 79°, with overnight lows between 41° and 60°. The average high for September is 70° with an average low of 50°. 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.
