S
M
T
W
T
F
S
30
85°
62°
31
84°
68°
1
88°
73°
2
91°
72°
3
92°
68°
4
81°
63°
5
81°
57°
6
80°
60°
7
81°
64°
8
79°
63°
9
83°
68°
10
82°
64°
11
76°
63°
12
74°
62°
13
74°
60°
14
75°
59°
15
76°
56°
16
74°
60°
17
76°
56°
18
72°
55°
19
78°
58°
20
79°
60°
21
78°
60°
22
76°
59°
23
75°
55°
24
72°
55°
25
76°
58°
26
76°
58°
27
75°
53°
28
66°
51°
29
65°
50°
30
65°
48°
1
63°
47°
2
68°
54°
3
69°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Aliquippa
Aliquippa's September 2026 forecast shows daily high temperatures ranging from 63° to 92°, with overnight lows between 47° and 72°. The average high for September is 76° with an average low of 58°. 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 Aliquippa. See also: October | November | December.
