S
M
T
W
T
F
S
30
94°
71°
31
96°
71°
1
99°
72°
2
99°
72°
3
100°
73°
4
99°
75°
5
93°
72°
6
96°
69°
7
97°
73°
8
93°
69°
9
90°
70°
10
89°
69°
11
90°
69°
12
92°
71°
13
90°
70°
14
89°
68°
15
89°
68°
16
90°
67°
17
88°
66°
18
87°
64°
19
99°
65°
20
86°
66°
21
91°
66°
22
90°
65°
23
91°
64°
24
91°
64°
25
90°
63°
26
90°
64°
27
89°
64°
28
89°
63°
29
88°
63°
30
89°
62°
1
88°
60°
2
87°
55°
3
79°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Newton
Newton's September 2026 forecast shows daily high temperatures ranging from 79° to 99°, with overnight lows between 52° and 73°. The average high for September is 90° with an average low of 65°. 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 Newton. See also: October | November | December.
