S
M
T
W
T
F
S
30
82°
67°
31
86°
68°
1
91°
74°
2
94°
72°
3
91°
70°
4
86°
69°
5
79°
63°
6
80°
61°
7
79°
63°
8
77°
64°
9
84°
65°
10
80°
61°
11
75°
60°
12
77°
56°
13
73°
59°
14
73°
58°
15
71°
53°
16
78°
59°
17
77°
58°
18
73°
57°
19
77°
58°
20
77°
58°
21
75°
57°
22
73°
56°
23
71°
52°
24
72°
54°
25
75°
56°
26
75°
52°
27
65°
48°
28
64°
46°
29
63°
47°
30
63°
44°
1
62°
43°
2
63°
47°
3
68°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Ontwa Township
Ontwa Township's September 2026 forecast shows daily high temperatures ranging from 62° to 94°, with overnight lows between 43° and 72°. The average high for September is 75° with an average low of 57°. 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 Ontwa Township. See also: October | November | December.
