S
M
T
W
T
F
S
30
72°
59°
31
75°
58°
1
78°
59°
2
79°
59°
3
81°
62°
4
75°
60°
5
70°
58°
6
73°
53°
7
77°
53°
8
73°
57°
9
71°
57°
10
74°
51°
11
69°
45°
12
78°
49°
13
81°
56°
14
66°
43°
15
65°
41°
16
78°
55°
17
70°
54°
18
66°
43°
19
62°
38°
20
65°
41°
21
59°
45°
22
62°
38°
23
68°
39°
24
68°
38°
25
73°
38°
26
73°
44°
27
68°
51°
28
62°
50°
29
58°
46°
30
70°
44°
1
66°
59°
2
64°
45°
3
62°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in South Dundas
South Dundas's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 South Dundas. See also: October | November | December.