S
M
T
W
T
F
S
30
84°
58°
31
78°
57°
1
78°
57°
2
77°
58°
3
77°
62°
4
78°
56°
5
80°
55°
6
77°
56°
7
76°
55°
8
77°
56°
9
77°
57°
10
79°
61°
11
79°
60°
12
74°
57°
13
Hist. Avg.
75°
51°
14
Hist. Avg.
74°
51°
15
Hist. Avg.
74°
51°
16
Hist. Avg.
74°
50°
17
Hist. Avg.
73°
50°
18
Hist. Avg.
73°
49°
19
Hist. Avg.
72°
49°
20
Hist. Avg.
72°
48°
21
Hist. Avg.
72°
48°
22
Hist. Avg.
71°
47°
23
Hist. Avg.
71°
47°
24
Hist. Avg.
70°
46°
25
Hist. Avg.
70°
46°
26
Hist. Avg.
70°
46°
27
Hist. Avg.
69°
45°
28
Hist. Avg.
69°
45°
29
Hist. Avg.
68°
44°
30
Hist. Avg.
68°
44°
1
Hist. Avg.
68°
43°
2
Hist. Avg.
67°
43°
3
Hist. Avg.
67°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Cornwall-on-Hudson
Cornwall-on-Hudson's September 2026 forecast shows daily high temperatures ranging from 74° to 84°, with overnight lows between 55° and 62°. The average high for September is 78° with an average low of 58°. 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 Cornwall-on-Hudson. See also: October | November | December.
