S
M
T
W
T
F
S
30
91°
73°
31
94°
74°
1
94°
76°
2
95°
76°
3
96°
77°
4
95°
75°
5
97°
73°
6
95°
72°
7
83°
72°
8
88°
71°
9
89°
71°
10
91°
73°
11
88°
71°
12
85°
72°
13
90°
72°
14
93°
72°
15
90°
75°
16
89°
73°
17
90°
69°
18
93°
71°
19
92°
71°
20
87°
70°
21
90°
68°
22
88°
69°
23
80°
64°
24
77°
62°
25
78°
61°
26
79°
60°
27
79°
61°
28
80°
61°
29
78°
59°
30
80°
60°
1
79°
60°
2
78°
56°
3
79°
63°
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 77° to 90°, with overnight lows between 56° and 70°. The average high for September is 81° with an average low of 62°. 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.
