S
M
T
W
T
F
S
30
89°
54°
31
93°
55°
1
93°
58°
2
89°
53°
3
87°
53°
4
87°
54°
5
88°
56°
6
88°
55°
7
87°
54°
8
87°
56°
9
86°
57°
10
88°
60°
11
89°
59°
12
89°
60°
13
88°
62°
14
92°
61°
15
93°
60°
16
93°
59°
17
92°
58°
18
92°
58°
19
91°
57°
20
89°
58°
21
91°
59°
22
91°
59°
23
90°
58°
24
86°
59°
25
81°
58°
26
80°
58°
27
81°
57°
28
82°
58°
29
83°
59°
30
82°
58°
1
85°
55°
2
82°
55°
3
86°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Newtown
Newtown's September 2026 forecast shows daily high temperatures ranging from 80° to 93°, with overnight lows between 53° and 62°. The average high for September is 88° with an average low of 57°. 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. See also: October | November | December.
