S
M
T
W
T
F
S
30
83°
56°
31
78°
68°
1
90°
68°
2
73°
67°
3
88°
71°
4
85°
66°
5
82°
63°
6
74°
58°
7
79°
61°
8
84°
64°
9
82°
66°
10
87°
64°
11
78°
58°
12
79°
60°
13
81°
60°
14
83°
59°
15
86°
62°
16
84°
56°
17
75°
54°
18
73°
52°
19
79°
57°
20
80°
58°
21
77°
56°
22
77°
56°
23
73°
58°
24
77°
56°
25
74°
55°
26
76°
57°
27
76°
56°
28
75°
52°
29
68°
48°
30
69°
51°
1
68°
47°
2
67°
52°
3
66°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Adelphia
Adelphia's September 2026 forecast shows daily high temperatures ranging from 66° to 88°, with overnight lows between 47° and 71°. The average high for September is 77° 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 Adelphia. See also: October | November | December.
