S
M
T
W
T
F
S
30
90°
73°
31
90°
70°
1
93°
70°
2
95°
68°
3
93°
72°
4
93°
70°
5
90°
70°
6
89°
68°
7
84°
68°
8
92°
70°
9
82°
63°
10
82°
57°
11
84°
57°
12
75°
55°
13
59°
55°
14
77°
57°
15
72°
59°
16
70°
59°
17
79°
66°
18
93°
68°
19
83°
63°
20
66°
61°
21
64°
59°
22
61°
55°
23
72°
54°
24
68°
57°
25
64°
59°
26
70°
63°
27
69°
58°
28
70°
58°
29
69°
62°
30
71°
57°
1
70°
51°
2
71°
49°
3
70°
50°
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 69° to 71°, with overnight lows between 49° and 63°. The average high for September is 70° with an average low of 56°. 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.
