S
M
T
W
T
F
S
30
85°
60°
31
85°
70°
1
93°
71°
2
79°
72°
3
87°
71°
4
89°
73°
5
84°
64°
6
84°
60°
7
84°
60°
8
81°
62°
9
85°
68°
10
81°
65°
11
78°
57°
12
77°
64°
13
79°
64°
14
80°
61°
15
80°
63°
16
78°
58°
17
76°
58°
18
71°
54°
19
73°
52°
20
73°
54°
21
72°
53°
22
71°
58°
23
71°
58°
24
70°
57°
25
71°
57°
26
76°
56°
27
74°
54°
28
74°
56°
29
75°
56°
30
76°
55°
1
75°
56°
2
74°
55°
3
73°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Kennett Square
Kennett Square's September 2026 forecast shows daily high temperatures ranging from 70° to 85°, with overnight lows between 52° and 68°. 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 Kennett Square. See also: October | November | December.
