S
M
T
W
T
F
S
30
86°
65°
31
88°
70°
1
91°
75°
2
95°
73°
3
90°
70°
4
83°
69°
5
81°
63°
6
81°
58°
7
82°
56°
8
86°
66°
9
90°
70°
10
75°
57°
11
78°
58°
12
81°
64°
13
83°
64°
14
78°
62°
15
77°
59°
16
75°
58°
17
79°
58°
18
78°
58°
19
74°
56°
20
73°
52°
21
77°
57°
22
72°
56°
23
72°
56°
24
76°
55°
25
77°
56°
26
77°
55°
27
75°
55°
28
77°
56°
29
77°
56°
30
76°
55°
1
77°
55°
2
74°
50°
3
72°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Beaver Falls
Beaver Falls's September 2026 forecast shows daily high temperatures ranging from 72° to 90°, with overnight lows between 46° and 70°. The average high for September is 77° with an average low of 57°. 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 Beaver Falls. See also: October | November | December.