S
M
T
W
T
F
S
30
80°
61°
31
79°
69°
1
78°
67°
2
74°
65°
3
88°
69°
4
85°
73°
5
80°
68°
6
73°
61°
7
79°
57°
8
80°
61°
9
80°
63°
10
87°
72°
11
79°
62°
12
77°
59°
13
79°
70°
14
75°
61°
15
70°
54°
16
75°
57°
17
80°
68°
18
81°
68°
19
69°
62°
20
69°
64°
21
69°
60°
22
68°
57°
23
68°
55°
24
66°
54°
25
68°
55°
26
62°
56°
27
66°
59°
28
63°
56°
29
69°
59°
30
72°
61°
1
74°
64°
2
78°
56°
3
70°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Wantagh
Wantagh's September 2026 forecast shows daily high temperatures ranging from 63° to 78°, with overnight lows between 54° and 64°. The average high for September is 70° with an average low of 58°. 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 Wantagh. See also: October | November | December.