S
M
T
W
T
F
S
30
84°
65°
31
84°
65°
1
83°
62°
2
77°
57°
3
76°
57°
4
76°
58°
5
77°
56°
6
80°
61°
7
82°
63°
8
82°
62°
9
79°
62°
10
82°
63°
11
83°
62°
12
82°
63°
13
83°
64°
14
82°
54°
15
74°
53°
16
72°
53°
17
74°
54°
18
72°
52°
19
73°
51°
20
71°
51°
21
76°
53°
22
77°
57°
23
78°
50°
24
78°
49°
25
71°
48°
26
70°
50°
27
72°
55°
28
74°
55°
29
75°
47°
30
70°
48°
1
67°
54°
2
69°
53°
3
72°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Newtown Square
Newtown Square's September 2026 forecast shows daily high temperatures ranging from 67° to 84°, with overnight lows between 47° and 65°. The average high for September is 76° with an average low of 56°. 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.
