S
M
T
W
T
F
S
30
66°
63°
31
82°
63°
1
82°
61°
2
81°
57°
3
73°
59°
4
66°
59°
5
66°
61°
6
81°
55°
7
79°
61°
8
77°
63°
9
72°
55°
10
75°
46°
11
81°
61°
12
66°
48°
13
64°
39°
14
57°
37°
15
64°
45°
16
67°
45°
17
71°
46°
18
59°
50°
19
65°
45°
20
62°
48°
21
63°
46°
22
64°
45°
23
67°
47°
24
68°
46°
25
70°
47°
26
70°
50°
27
68°
48°
28
66°
47°
29
63°
40°
30
63°
45°
1
65°
45°
2
55°
43°
3
60°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Brookston
Brookston's September 2026 forecast shows daily high temperatures ranging from 55° to 71°, with overnight lows between 40° and 50°. The average high for September is 65° with an average low of 46°. 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 Brookston. See also: October | November | December.