S
M
T
W
T
F
S
30
63°
46°
31
64°
54°
1
70°
54°
2
72°
48°
3
73°
52°
4
71°
45°
5
64°
47°
6
64°
50°
7
70°
53°
8
65°
50°
9
62°
51°
10
61°
52°
11
62°
51°
12
61°
50°
13
61°
48°
14
63°
51°
15
69°
50°
16
69°
45°
17
66°
44°
18
63°
44°
19
68°
51°
20
66°
51°
21
61°
44°
22
60°
46°
23
59°
44°
24
59°
43°
25
60°
43°
26
60°
44°
27
59°
50°
28
58°
48°
29
59°
47°
30
61°
48°
1
64°
50°
2
58°
46°
3
60°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Sandown
Sandown's September 2026 forecast shows daily high temperatures ranging from 58° to 73°, with overnight lows between 43° and 54°. The average high for September is 64° with an average low of 48°. 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 Sandown. See also: October | November | December.
