S
M
T
W
T
F
S
30
70°
48°
31
74°
50°
1
66°
47°
2
71°
50°
3
75°
48°
4
73°
42°
5
68°
40°
6
68°
39°
7
69°
48°
8
73°
45°
9
72°
39°
10
65°
37°
11
62°
39°
12
61°
38°
13
63°
37°
14
62°
35°
15
59°
36°
16
59°
35°
17
58°
33°
18
58°
35°
19
59°
35°
20
59°
36°
21
63°
40°
22
66°
44°
23
64°
37°
24
66°
44°
25
63°
39°
26
62°
33°
27
55°
37°
28
55°
41°
29
54°
38°
30
57°
38°
1
56°
34°
2
55°
33°
3
53°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Brimson
Brimson's September 2026 forecast shows daily high temperatures ranging from 53° to 75°, with overnight lows between 33° and 50°. The average high for September is 63° with an average low of 40°. 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 Brimson. See also: October | November | December.
