S
M
T
W
T
F
S
30
78°
65°
31
81°
69°
1
83°
70°
2
82°
69°
3
79°
67°
4
77°
64°
5
76°
62°
6
76°
61°
7
78°
67°
8
82°
62°
9
75°
60°
10
76°
60°
11
79°
56°
12
74°
58°
13
74°
58°
14
72°
57°
15
74°
58°
16
75°
57°
17
74°
57°
18
78°
58°
19
73°
56°
20
73°
54°
21
72°
55°
22
72°
56°
23
74°
59°
24
78°
55°
25
78°
60°
26
77°
61°
27
72°
57°
28
70°
57°
29
77°
55°
30
74°
52°
1
69°
56°
2
74°
61°
3
75°
50°
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 69° to 83°, with overnight lows between 50° and 70°. The average high for September is 76° with an average low of 59°. 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.