S
M
T
W
T
F
S
30
105°
77°
31
103°
77°
1
101°
75°
2
101°
76°
3
100°
78°
4
99°
74°
5
101°
76°
6
102°
74°
7
102°
74°
8
103°
74°
9
99°
74°
10
83°
70°
11
92°
63°
12
94°
70°
13
90°
67°
14
99°
71°
15
93°
68°
16
94°
73°
17
97°
71°
18
95°
74°
19
96°
67°
20
81°
64°
21
81°
63°
22
75°
58°
23
77°
57°
24
80°
60°
25
81°
60°
26
83°
62°
27
81°
61°
28
80°
54°
29
72°
61°
30
73°
60°
1
76°
61°
2
79°
60°
3
79°
58°
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 97°, with overnight lows between 54° and 74°. The average high for September is 83° 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.
