S
M
T
W
T
F
S
30
83°
63°
31
84°
64°
1
84°
64°
2
83°
63°
3
84°
56°
4
76°
54°
5
75°
57°
6
78°
63°
7
82°
63°
8
82°
62°
9
76°
57°
10
75°
61°
11
81°
62°
12
80°
62°
13
81°
61°
14
81°
61°
15
80°
60°
16
80°
60°
17
75°
59°
18
80°
52°
19
71°
51°
20
72°
50°
21
69°
49°
22
70°
53°
23
71°
52°
24
71°
49°
25
69°
49°
26
69°
56°
27
71°
55°
28
76°
56°
29
75°
55°
30
75°
55°
1
69°
53°
2
73°
53°
3
67°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Shadyside
Shadyside's September 2026 forecast shows daily high temperatures ranging from 67° to 84°, with overnight lows between 49° and 64°. The average high for September is 76° 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 Shadyside. See also: October | November | December.