S
M
T
W
T
F
S
30
94°
71°
31
93°
71°
1
92°
72°
2
93°
71°
3
92°
71°
4
93°
70°
5
92°
71°
6
92°
71°
7
92°
70°
8
91°
68°
9
90°
68°
10
90°
69°
11
89°
70°
12
91°
69°
13
91°
65°
14
78°
62°
15
76°
66°
16
88°
65°
17
90°
60°
18
84°
53°
19
76°
54°
20
77°
59°
21
80°
62°
22
84°
62°
23
81°
61°
24
84°
61°
25
79°
60°
26
84°
60°
27
84°
49°
28
72°
49°
29
74°
52°
30
76°
59°
1
81°
59°
2
82°
58°
3
83°
59°
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 72° to 94°, with overnight lows between 49° and 72°. The average high for September is 85° with an average low of 63°. 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.
