S
M
T
W
T
F
S
30
85°
67°
31
87°
69°
1
88°
70°
2
87°
70°
3
87°
66°
4
81°
66°
5
82°
69°
6
86°
67°
7
83°
65°
8
83°
63°
9
86°
68°
10
85°
68°
11
86°
59°
12
83°
66°
13
81°
66°
14
84°
67°
15
80°
66°
16
83°
65°
17
84°
66°
18
84°
65°
19
82°
66°
20
83°
57°
21
82°
54°
22
74°
62°
23
74°
62°
24
79°
61°
25
80°
63°
26
80°
55°
27
81°
53°
28
72°
53°
29
71°
55°
30
71°
52°
1
70°
54°
2
70°
59°
3
71°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Marcus Hook
Marcus Hook's September 2026 forecast shows daily high temperatures ranging from 70° to 88°, with overnight lows between 52° and 70°. The average high for September is 81° with an average low of 63°. 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 Marcus Hook. See also: October | November | December.
