S
M
T
W
T
F
S
30
83°
64°
31
81°
66°
1
90°
68°
2
93°
72°
3
90°
68°
4
77°
66°
5
78°
61°
6
77°
54°
7
77°
52°
8
81°
68°
9
76°
59°
10
74°
48°
11
76°
57°
12
80°
59°
13
76°
57°
14
75°
62°
15
71°
54°
16
70°
52°
17
67°
51°
18
64°
47°
19
65°
47°
20
64°
46°
21
67°
48°
22
65°
52°
23
66°
54°
24
70°
53°
25
74°
53°
26
72°
52°
27
72°
52°
28
73°
54°
29
74°
54°
30
74°
53°
1
73°
51°
2
72°
46°
3
59°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Ionia
Ionia's September 2026 forecast shows daily high temperatures ranging from 59° to 81°, with overnight lows between 43° and 68°. The average high for September is 71° with an average low of 53°. 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 Ionia. See also: October | November | December.
