S
M
T
W
T
F
S
30
74°
65°
31
71°
65°
1
75°
67°
2
76°
63°
3
75°
60°
4
73°
57°
5
76°
58°
6
76°
56°
7
74°
54°
8
75°
61°
9
71°
64°
10
68°
53°
11
71°
47°
12
78°
55°
13
69°
50°
14
64°
47°
15
67°
49°
16
69°
54°
17
70°
50°
18
65°
47°
19
66°
43°
20
67°
48°
21
58°
43°
22
65°
40°
23
70°
44°
24
70°
33°
25
68°
35°
26
70°
41°
27
70°
44°
28
71°
41°
29
70°
49°
30
66°
52°
1
68°
49°
2
67°
47°
3
63°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Georgian Bay
Georgian Bay's September 2026 forecast shows daily high temperatures ranging from 63° to 71°, with overnight lows between 33° and 52°. The average high for September is 68° with an average low of 44°. 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 Georgian Bay. See also: October | November | December.
