S
M
T
W
T
F
S
30
83°
56°
31
81°
66°
1
90°
72°
2
73°
69°
3
89°
69°
4
86°
73°
5
81°
65°
6
80°
60°
7
80°
59°
8
83°
54°
9
87°
64°
10
88°
73°
11
82°
62°
12
82°
57°
13
82°
69°
14
76°
57°
15
75°
51°
16
82°
56°
17
83°
68°
18
83°
68°
19
75°
63°
20
73°
64°
21
73°
62°
22
N/A
23
N/A
24
64°
50°
25
72°
52°
26
67°
56°
27
63°
57°
28
69°
54°
29
73°
52°
30
74°
57°
1
75°
60°
2
73°
53°
3
71°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Newtown Square
Newtown Square's September 2026 forecast shows daily high temperatures ranging from 63° to 75°, with overnight lows between 50° and 60°. The average high for September is 70° 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 Newtown Square. See also: October | November | December.
