S
M
T
W
T
F
S
30
92°
71°
31
91°
71°
1
92°
70°
2
92°
71°
3
90°
70°
4
81°
58°
5
85°
58°
6
89°
61°
7
88°
63°
8
88°
61°
9
89°
63°
10
90°
65°
11
90°
65°
12
89°
64°
13
89°
65°
14
88°
67°
15
90°
66°
16
90°
63°
17
89°
63°
18
85°
62°
19
87°
64°
20
88°
63°
21
87°
63°
22
87°
64°
23
86°
63°
24
86°
60°
25
82°
54°
26
73°
49°
27
72°
47°
28
72°
46°
29
73°
54°
30
74°
58°
1
79°
51°
2
71°
46°
3
70°
54°
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 70° to 92°, with overnight lows between 46° and 71°. The average high for September is 85° with an average low of 61°. 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.
