S
M
T
W
T
F
S
30
70°
61°
31
70°
59°
1
66°
55°
2
68°
54°
3
70°
61°
4
75°
59°
5
66°
55°
6
66°
57°
7
80°
59°
8
69°
51°
9
62°
47°
10
60°
48°
11
63°
50°
12
62°
51°
13
59°
49°
14
59°
49°
15
62°
50°
16
61°
50°
17
59°
48°
18
60°
49°
19
59°
51°
20
60°
50°
21
59°
52°
22
61°
52°
23
62°
51°
24
62°
51°
25
61°
48°
26
60°
45°
27
56°
43°
28
55°
43°
29
56°
44°
30
56°
50°
1
55°
46°
2
54°
44°
3
57°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Brilon
Brilon's September 2026 forecast shows daily high temperatures ranging from 54° to 80°, with overnight lows between 43° and 59°. The average high for September is 61° with an average low of 49°. 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 Brilon. See also: October | November | December.
