S
M
T
W
T
F
S
30
84°
68°
31
86°
70°
1
88°
71°
2
88°
69°
3
75°
69°
4
82°
68°
5
75°
63°
6
73°
57°
7
75°
57°
8
79°
68°
9
80°
59°
10
76°
52°
11
77°
61°
12
79°
56°
13
70°
59°
14
73°
60°
15
68°
52°
16
66°
51°
17
70°
51°
18
66°
50°
19
68°
49°
20
66°
50°
21
69°
49°
22
67°
55°
23
69°
54°
24
73°
55°
25
74°
55°
26
73°
54°
27
73°
55°
28
74°
55°
29
74°
54°
30
73°
55°
1
70°
49°
2
65°
45°
3
59°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Brookfield
Brookfield's September 2026 forecast shows daily high temperatures ranging from 59° to 80°, with overnight lows between 41° and 68°. The average high for September is 71° with an average low of 54°. 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 Brookfield. See also: October | November | December.
