S
M
T
W
T
F
S
30
89°
68°
31
88°
68°
1
90°
67°
2
89°
67°
3
89°
70°
4
90°
71°
5
91°
68°
6
90°
66°
7
88°
70°
8
88°
68°
9
86°
69°
10
86°
68°
11
89°
67°
12
89°
68°
13
88°
67°
14
89°
67°
15
89°
68°
16
88°
67°
17
88°
66°
18
87°
67°
19
88°
66°
20
87°
65°
21
86°
65°
22
88°
64°
23
88°
65°
24
87°
63°
25
87°
60°
26
86°
60°
27
85°
64°
28
86°
63°
29
85°
60°
30
84°
61°
1
85°
62°
2
85°
62°
3
85°
62°
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 84° to 91°, with overnight lows between 60° and 71°. The average high for September is 88° with an average low of 66°. 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.
