S
M
T
W
T
F
S
30
88°
70°
31
91°
70°
1
95°
70°
2
95°
72°
3
95°
72°
4
93°
70°
5
90°
70°
6
93°
70°
7
86°
70°
8
88°
70°
9
90°
66°
10
90°
70°
11
90°
73°
12
86°
72°
13
90°
70°
14
91°
66°
15
91°
68°
16
88°
70°
17
91°
62°
18
95°
67°
19
92°
70°
20
87°
66°
21
84°
68°
22
83°
67°
23
82°
65°
24
80°
62°
25
80°
60°
26
80°
60°
27
79°
62°
28
79°
60°
29
77°
59°
30
78°
56°
1
82°
61°
2
77°
61°
3
80°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Ypsilanti
Ypsilanti's September 2026 forecast shows daily high temperatures ranging from 77° to 95°, with overnight lows between 56° and 70°. The average high for September is 83° with an average low of 63°. 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 Ypsilanti. See also: October | November | December.
