S
M
T
W
T
F
S
30
78°
65°
31
84°
69°
1
88°
68°
2
91°
71°
3
87°
66°
4
77°
66°
5
74°
59°
6
78°
55°
7
78°
50°
8
81°
55°
9
76°
67°
10
77°
54°
11
76°
49°
12
83°
61°
13
76°
48°
14
70°
55°
15
80°
64°
16
74°
63°
17
74°
57°
18
73°
59°
19
76°
60°
20
70°
57°
21
67°
56°
22
68°
52°
23
69°
51°
24
72°
53°
25
73°
52°
26
71°
53°
27
74°
53°
28
74°
53°
29
72°
52°
30
69°
52°
1
72°
51°
2
72°
50°
3
70°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Waterloo Township
Waterloo Township's September 2026 forecast shows daily high temperatures ranging from 67° to 80°, with overnight lows between 50° and 64°. The average high for September is 72° 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 Waterloo Township. See also: October | November | December.
