S
M
T
W
T
F
S
30
79°
62°
31
77°
68°
1
78°
66°
2
75°
65°
3
85°
70°
4
84°
70°
5
80°
66°
6
73°
60°
7
79°
56°
8
80°
61°
9
79°
62°
10
86°
70°
11
78°
62°
12
N/A
13
78°
67°
14
76°
55°
15
71°
59°
16
77°
66°
17
80°
68°
18
79°
66°
19
74°
62°
20
70°
60°
21
72°
58°
22
68°
61°
23
68°
61°
24
69°
59°
25
71°
59°
26
72°
57°
27
67°
61°
28
74°
61°
29
74°
58°
30
68°
56°
1
66°
55°
2
69°
59°
3
72°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Mount Sinai
Mount Sinai's September 2026 forecast shows daily high temperatures ranging from 66° to 80°, with overnight lows between 55° and 68°. The average high for September is 72° with an average low of 60°. 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 Mount Sinai. See also: October | November | December.
