S
M
T
W
T
F
S
30
81°
58°
31
80°
57°
1
81°
58°
2
81°
54°
3
78°
49°
4
71°
47°
5
71°
55°
6
72°
57°
7
78°
56°
8
78°
56°
9
79°
54°
10
74°
51°
11
77°
53°
12
78°
55°
13
77°
55°
14
77°
53°
15
76°
48°
16
71°
44°
17
68°
51°
18
72°
46°
19
69°
43°
20
70°
42°
21
63°
40°
22
63°
49°
23
64°
45°
24
64°
41°
25
62°
39°
26
62°
42°
27
63°
48°
28
69°
40°
29
68°
39°
30
60°
42°
1
62°
41°
2
62°
37°
3
59°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Long Sault
Long Sault's September 2026 forecast shows daily high temperatures ranging from 59° to 81°, with overnight lows between 37° and 58°. The average high for September is 71° 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 Long Sault. See also: October | November | December.
