S
M
T
W
T
F
S
30
72°
65°
31
76°
56°
1
79°
64°
2
83°
62°
3
79°
60°
4
76°
55°
5
74°
55°
6
71°
48°
7
75°
61°
8
75°
62°
9
73°
67°
10
76°
55°
11
69°
52°
12
75°
60°
13
77°
59°
14
69°
53°
15
70°
56°
16
68°
54°
17
69°
53°
18
70°
52°
19
67°
51°
20
65°
48°
21
63°
54°
22
64°
53°
23
67°
53°
24
69°
52°
25
71°
53°
26
71°
50°
27
63°
46°
28
70°
52°
29
71°
53°
30
72°
53°
1
72°
52°
2
70°
50°
3
69°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Gananoque
Gananoque's September 2026 forecast shows daily high temperatures ranging from 63° to 77°, with overnight lows between 46° and 67°. The average high for September is 70° with an average low of 54°. 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 Gananoque. See also: October | November | December.
