S
M
T
W
T
F
S
30
87°
68°
31
88°
67°
1
88°
68°
2
87°
68°
3
88°
70°
4
86°
68°
5
88°
65°
6
87°
59°
7
81°
59°
8
80°
61°
9
81°
63°
10
83°
65°
11
86°
63°
12
87°
64°
13
85°
68°
14
86°
67°
15
86°
62°
16
83°
63°
17
85°
64°
18
84°
66°
19
85°
64°
20
84°
60°
21
82°
65°
22
79°
65°
23
77°
60°
24
79°
65°
25
79°
62°
26
81°
59°
27
78°
60°
28
78°
63°
29
79°
58°
30
77°
63°
1
77°
67°
2
84°
64°
3
78°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Larchmont
Larchmont's September 2026 forecast shows daily high temperatures ranging from 77° to 88°, with overnight lows between 58° and 70°. The average high for September is 83° with an average low of 64°. 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 Larchmont. See also: October | November | December.
