S
M
T
W
T
F
S
30
85°
59°
31
76°
70°
1
90°
72°
2
73°
69°
3
89°
76°
4
88°
74°
5
81°
66°
6
76°
62°
7
82°
59°
8
83°
56°
9
87°
66°
10
90°
73°
11
82°
62°
12
78°
57°
13
85°
76°
14
77°
57°
15
70°
55°
16
81°
56°
17
83°
66°
18
84°
68°
19
69°
65°
20
73°
65°
21
68°
62°
22
65°
60°
23
68°
57°
24
66°
57°
25
69°
59°
26
66°
57°
27
66°
59°
28
70°
58°
29
73°
58°
30
75°
61°
1
74°
62°
2
74°
58°
3
72°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Neptune City
Neptune City's September 2026 forecast shows daily high temperatures ranging from 66° to 75°, with overnight lows between 57° and 62°. 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 Neptune City. See also: October | November | December.
