S
M
T
W
T
F
S
30
86°
63°
31
83°
62°
1
85°
61°
2
84°
62°
3
82°
60°
4
84°
61°
5
83°
61°
6
84°
59°
7
Hist. Avg.
78°
59°
8
Hist. Avg.
77°
58°
9
Hist. Avg.
77°
58°
10
Hist. Avg.
77°
58°
11
Hist. Avg.
76°
58°
12
Hist. Avg.
76°
57°
13
Hist. Avg.
76°
57°
14
Hist. Avg.
76°
57°
15
Hist. Avg.
75°
56°
16
Hist. Avg.
75°
56°
17
Hist. Avg.
74°
56°
18
Hist. Avg.
74°
55°
19
Hist. Avg.
74°
55°
20
Hist. Avg.
73°
54°
21
Hist. Avg.
73°
54°
22
Hist. Avg.
73°
54°
23
Hist. Avg.
72°
54°
24
Hist. Avg.
72°
53°
25
Hist. Avg.
72°
53°
26
Hist. Avg.
71°
52°
27
Hist. Avg.
71°
52°
28
Hist. Avg.
70°
52°
29
Hist. Avg.
70°
51°
30
Hist. Avg.
70°
51°
1
Hist. Avg.
69°
50°
2
Hist. Avg.
69°
50°
3
Hist. Avg.
68°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Pittsburgh
Pittsburgh's September 2026 forecast shows daily high temperatures ranging from 82° to 86°, with overnight lows between 59° and 63°. The average high for September is 84° with an average low of 61°. 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 Pittsburgh. See also: October | November | December.
