S
M
T
W
T
F
S
30
87°
67°
31
93°
67°
1
95°
74°
2
94°
72°
3
95°
72°
4
96°
74°
5
95°
70°
6
83°
62°
7
82°
57°
8
87°
59°
9
79°
67°
10
79°
60°
11
83°
64°
12
82°
66°
13
80°
61°
14
85°
67°
15
85°
61°
16
78°
58°
17
74°
56°
18
73°
55°
19
76°
57°
20
75°
55°
21
73°
51°
22
72°
55°
23
75°
50°
24
80°
55°
25
77°
56°
26
80°
56°
27
80°
55°
28
79°
56°
29
78°
56°
30
78°
53°
1
75°
48°
2
71°
54°
3
77°
54°
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 71° to 85°, with overnight lows between 48° and 67°. The average high for September is 78° with an average low of 57°. 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.
