S
M
T
W
T
F
S
30
78°
58°
31
77°
57°
1
78°
63°
2
78°
66°
3
79°
65°
4
86°
66°
5
85°
64°
6
83°
57°
7
80°
57°
8
78°
58°
9
77°
55°
10
76°
55°
11
76°
56°
12
75°
56°
13
79°
60°
14
81°
62°
15
79°
60°
16
76°
57°
17
75°
58°
18
76°
60°
19
77°
52°
20
75°
54°
21
75°
52°
22
79°
51°
23
73°
50°
24
72°
50°
25
72°
56°
26
73°
50°
27
73°
55°
28
72°
55°
29
70°
48°
30
70°
50°
1
69°
55°
2
75°
52°
3
73°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in South Amboy
South Amboy's September 2026 forecast shows daily high temperatures ranging from 69° to 86°, with overnight lows between 48° and 66°. The average high for September is 76° 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 South Amboy. See also: October | November | December.
