S
M
T
W
T
F
S
30
86°
74°
31
86°
72°
1
87°
74°
2
86°
73°
3
87°
74°
4
89°
73°
5
90°
73°
6
90°
71°
7
88°
72°
8
89°
72°
9
88°
71°
10
90°
72°
11
89°
71°
12
89°
71°
13
90°
70°
14
89°
71°
15
89°
71°
16
88°
70°
17
88°
70°
18
87°
69°
19
87°
70°
20
86°
68°
21
87°
65°
22
85°
66°
23
84°
69°
24
86°
69°
25
86°
68°
26
85°
68°
27
86°
66°
28
86°
67°
29
83°
64°
30
84°
62°
1
81°
66°
2
81°
67°
3
85°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Atlantic
Atlantic's September 2026 forecast shows daily high temperatures ranging from 81° to 90°, with overnight lows between 62° and 74°. The average high for September is 87° with an average low of 70°. 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 Atlantic. See also: October | November | December.
