S
M
T
W
T
F
S
30
86°
61°
31
83°
58°
1
79°
64°
2
81°
61°
3
79°
57°
4
79°
58°
5
80°
62°
6
81°
63°
7
84°
62°
8
82°
60°
9
78°
62°
10
84°
55°
11
77°
54°
12
76°
54°
13
76°
55°
14
79°
60°
15
82°
60°
16
82°
59°
17
81°
59°
18
81°
54°
19
77°
50°
20
73°
51°
21
72°
54°
22
73°
56°
23
77°
57°
24
78°
58°
25
79°
52°
26
78°
47°
27
73°
49°
28
70°
47°
29
70°
46°
30
69°
47°
1
Hist. Avg.
73°
50°
2
Hist. Avg.
72°
49°
3
Hist. Avg.
72°
49°
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 69° to 86°, with overnight lows between 46° and 64°. The average high for September is 78° with an average low of 56°. 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.
