S
M
T
W
T
F
S
30
76°
57°
31
69°
56°
1
62°
49°
2
64°
45°
3
64°
53°
4
65°
46°
5
N/A
6
63°
43°
7
68°
46°
8
66°
48°
9
68°
47°
10
69°
50°
11
71°
54°
12
66°
49°
13
70°
45°
14
69°
43°
15
72°
50°
16
75°
49°
17
60°
39°
18
65°
44°
19
67°
47°
20
61°
45°
21
62°
46°
22
64°
48°
23
64°
48°
24
66°
47°
25
66°
48°
26
68°
48°
27
68°
47°
28
68°
48°
29
66°
48°
30
63°
47°
1
64°
47°
2
64°
46°
3
68°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Boyanup
Boyanup's September 2026 forecast shows daily high temperatures ranging from 60° to 75°, with overnight lows between 39° and 54°. The average high for September is 66° with an average low of 47°. 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 Boyanup. See also: October | November | December.
