S
M
T
W
T
F
S
30
83°
54°
31
79°
66°
1
92°
69°
2
76°
67°
3
88°
67°
4
85°
67°
5
80°
58°
6
78°
55°
7
77°
51°
8
80°
59°
9
85°
66°
10
78°
61°
11
75°
52°
12
75°
59°
13
80°
61°
14
79°
59°
15
78°
57°
16
76°
56°
17
76°
54°
18
74°
57°
19
72°
53°
20
73°
51°
21
76°
56°
22
70°
55°
23
71°
55°
24
72°
54°
25
72°
54°
26
75°
53°
27
72°
48°
28
74°
53°
29
75°
54°
30
75°
54°
1
74°
53°
2
73°
52°
3
72°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Marshallton
Marshallton's September 2026 forecast shows daily high temperatures ranging from 70° to 85°, with overnight lows between 48° and 66°. The average high for September is 75° with an average low of 55°. 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 Marshallton. See also: October | November | December.
