S
M
T
W
T
F
S
30
83°
67°
31
82°
67°
1
81°
62°
2
75°
59°
3
74°
59°
4
74°
60°
5
75°
59°
6
79°
63°
7
81°
65°
8
80°
65°
9
77°
64°
10
79°
65°
11
81°
65°
12
81°
64°
13
80°
66°
14
80°
56°
15
73°
56°
16
70°
57°
17
72°
56°
18
70°
54°
19
71°
55°
20
70°
55°
21
76°
57°
22
76°
61°
23
75°
53°
24
76°
52°
25
71°
52°
26
68°
54°
27
72°
59°
28
72°
59°
29
74°
51°
30
70°
52°
1
66°
56°
2
67°
57°
3
70°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Mill Neck
Mill Neck's September 2026 forecast shows daily high temperatures ranging from 66° to 83°, with overnight lows between 51° and 67°. The average high for September is 75° 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 Mill Neck. See also: October | November | December.