S
M
T
W
T
F
S
30
105°
77°
31
103°
77°
1
101°
76°
2
101°
76°
3
100°
73°
4
99°
74°
5
101°
73°
6
102°
76°
7
100°
74°
8
101°
76°
9
100°
72°
10
94°
68°
11
88°
65°
12
86°
64°
13
86°
65°
14
83°
60°
15
88°
66°
16
87°
65°
17
88°
66°
18
89°
67°
19
88°
67°
20
88°
66°
21
87°
66°
22
87°
65°
23
86°
65°
24
85°
64°
25
85°
63°
26
84°
61°
27
85°
62°
28
85°
62°
29
84°
61°
30
84°
62°
1
83°
61°
2
83°
61°
3
82°
60°
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 82° to 102°, with overnight lows between 60° and 76°. The average high for September is 90° with an average low of 67°. 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.
