S
M
T
W
T
F
S
30
95°
71°
31
90°
67°
1
89°
62°
2
87°
60°
3
86°
60°
4
87°
61°
5
93°
58°
6
76°
66°
7
90°
70°
8
99°
71°
9
106°
74°
10
100°
76°
11
97°
70°
12
94°
69°
13
91°
65°
14
89°
65°
15
87°
62°
16
89°
63°
17
95°
66°
18
96°
68°
19
97°
67°
20
93°
66°
21
92°
65°
22
90°
64°
23
90°
65°
24
89°
60°
25
83°
58°
26
87°
60°
27
89°
60°
28
86°
58°
29
87°
61°
30
89°
63°
1
90°
63°
2
90°
62°
3
89°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Bloomington
Bloomington's September 2026 forecast shows daily high temperatures ranging from 83° to 97°, with overnight lows between 58° and 70°. The average high for September is 90° with an average low of 64°. 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 Bloomington. See also: October | November | December.
