S
M
T
W
T
F
S
30
74°
61°
31
68°
62°
1
72°
66°
2
78°
59°
3
77°
53°
4
75°
51°
5
76°
52°
6
75°
52°
7
77°
47°
8
77°
52°
9
71°
63°
10
71°
49°
11
70°
42°
12
78°
45°
13
72°
46°
14
63°
41°
15
65°
40°
16
71°
49°
17
71°
49°
18
65°
41°
19
64°
40°
20
68°
41°
21
58°
38°
22
64°
36°
23
N/A
24
69°
39°
25
69°
38°
26
73°
44°
27
73°
48°
28
67°
48°
29
73°
51°
30
69°
55°
1
69°
51°
2
68°
50°
3
66°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Muskoka
Muskoka's September 2026 forecast shows daily high temperatures ranging from 66° to 73°, with overnight lows between 38° and 55°. The average high for September is 70° 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 Muskoka. See also: October | November | December.
