S
M
T
W
T
F
S
30
69°
65°
31
74°
65°
1
87°
68°
2
87°
68°
3
85°
66°
4
76°
62°
5
79°
58°
6
72°
54°
7
80°
52°
8
79°
54°
9
76°
60°
10
81°
54°
11
77°
51°
12
78°
50°
13
84°
55°
14
72°
48°
15
76°
50°
16
79°
62°
17
75°
59°
18
72°
55°
19
65°
57°
20
68°
52°
21
60°
50°
22
59°
50°
23
59°
52°
24
65°
52°
25
64°
51°
26
66°
50°
27
65°
49°
28
68°
51°
29
69°
52°
30
69°
51°
1
67°
45°
2
62°
50°
3
60°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Dundas
Dundas's September 2026 forecast shows daily high temperatures ranging from 59° to 72°, with overnight lows between 45° and 57°. The average high for September is 65° with an average low of 51°. 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 Dundas. See also: October | November | December.
