S
M
T
W
T
F
S
30
69°
64°
31
76°
65°
1
84°
69°
2
81°
66°
3
76°
65°
4
75°
59°
5
74°
56°
6
73°
57°
7
76°
59°
8
76°
63°
9
80°
66°
10
71°
53°
11
68°
54°
12
73°
56°
13
73°
57°
14
74°
56°
15
74°
57°
16
73°
51°
17
72°
56°
18
66°
54°
19
72°
56°
20
73°
57°
21
72°
57°
22
71°
55°
23
68°
54°
24
66°
54°
25
70°
55°
26
69°
53°
27
60°
48°
28
59°
49°
29
60°
47°
30
59°
44°
1
57°
46°
2
58°
51°
3
64°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Grand Bend
Grand Bend's September 2026 forecast shows daily high temperatures ranging from 57° to 80°, with overnight lows between 44° and 66°. The average high for September is 69° with an average low of 55°. 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 Grand Bend. See also: October | November | December.
