S
M
T
W
T
F
S
30
85°
65°
31
82°
67°
1
88°
71°
2
92°
71°
3
88°
66°
4
81°
67°
5
79°
64°
6
77°
58°
7
78°
58°
8
82°
59°
9
85°
67°
10
79°
68°
11
80°
64°
12
84°
63°
13
82°
68°
14
70°
56°
15
80°
52°
16
85°
62°
17
82°
69°
18
76°
61°
19
71°
60°
20
73°
64°
21
61°
56°
22
60°
54°
23
59°
50°
24
65°
45°
25
68°
48°
26
69°
48°
27
70°
52°
28
66°
51°
29
69°
52°
30
69°
52°
1
67°
53°
2
66°
49°
3
65°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Bethel Park
Bethel Park's September 2026 forecast shows daily high temperatures ranging from 59° to 70°, with overnight lows between 45° and 56°. The average high for September is 66° with an average low of 51°. 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 Bethel Park. See also: October | November | December.
