S
M
T
W
T
F
S
30
82°
52°
31
73°
51°
1
73°
52°
2
74°
57°
3
73°
52°
4
74°
59°
5
78°
58°
6
80°
51°
7
76°
51°
8
71°
50°
9
71°
49°
10
70°
56°
11
73°
49°
12
74°
50°
13
68°
49°
14
69°
55°
15
73°
56°
16
76°
46°
17
77°
45°
18
67°
45°
19
66°
47°
20
66°
47°
21
67°
48°
22
64°
46°
23
64°
50°
24
65°
51°
25
65°
51°
26
71°
52°
27
71°
46°
28
72°
43°
29
63°
43°
30
64°
50°
1
63°
51°
2
67°
48°
3
68°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Clarkstown
Clarkstown's September 2026 forecast shows daily high temperatures ranging from 63° to 82°, with overnight lows between 43° and 59°. The average high for September is 71° with an average low of 50°. 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 Clarkstown. See also: October | November | December.
