S
M
T
W
T
F
S
30
78°
66°
31
78°
71°
1
80°
68°
2
73°
66°
3
86°
69°
4
86°
76°
5
81°
69°
6
74°
63°
7
80°
60°
8
82°
65°
9
80°
66°
10
88°
72°
11
79°
67°
12
77°
62°
13
82°
69°
14
78°
57°
15
74°
62°
16
80°
66°
17
82°
63°
18
79°
62°
19
75°
59°
20
73°
58°
21
71°
57°
22
69°
56°
23
71°
56°
24
70°
55°
25
73°
56°
26
74°
56°
27
73°
60°
28
77°
59°
29
76°
57°
30
71°
53°
1
69°
55°
2
71°
58°
3
75°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Manhasset
Manhasset's September 2026 forecast shows daily high temperatures ranging from 69° to 82°, with overnight lows between 53° and 69°. The average high for September is 74° 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 Manhasset. See also: October | November | December.
