S
M
T
W
T
F
S
30
74°
52°
31
78°
54°
1
79°
48°
2
72°
49°
3
73°
50°
4
75°
56°
5
76°
57°
6
79°
55°
7
77°
55°
8
72°
54°
9
72°
55°
10
78°
54°
11
72°
54°
12
76°
53°
13
71°
52°
14
70°
46°
15
68°
46°
16
69°
45°
17
69°
51°
18
72°
50°
19
75°
51°
20
76°
52°
21
71°
46°
22
73°
49°
23
67°
50°
24
73°
45°
25
72°
42°
26
65°
41°
27
Hist. Avg.
69°
46°
28
Hist. Avg.
69°
46°
29
Hist. Avg.
68°
45°
30
Hist. Avg.
68°
45°
1
Hist. Avg.
68°
45°
2
Hist. Avg.
67°
44°
3
Hist. Avg.
67°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Bloomington
Bloomington's September 2026 forecast shows daily high temperatures ranging from 65° to 79°, with overnight lows between 41° and 57°. The average high for September is 73° with an average low of 50°. 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.
