S
M
T
W
T
F
S
30
68°
63°
31
76°
65°
1
88°
70°
2
85°
67°
3
83°
65°
4
74°
64°
5
78°
59°
6
76°
56°
7
76°
55°
8
77°
54°
9
75°
65°
10
76°
58°
11
74°
51°
12
78°
53°
13
78°
56°
14
69°
49°
15
72°
51°
16
78°
63°
17
73°
59°
18
72°
54°
19
61°
55°
20
69°
54°
21
61°
47°
22
63°
46°
23
67°
47°
24
66°
38°
25
69°
42°
26
72°
44°
27
72°
48°
28
70°
46°
29
72°
51°
30
71°
54°
1
68°
52°
2
66°
48°
3
66°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Ingersoll
Ingersoll's September 2026 forecast shows daily high temperatures ranging from 66° to 72°, with overnight lows between 38° and 54°. The average high for September is 69° with an average low of 47°. 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 Ingersoll. See also: October | November | December.