S
M
T
W
T
F
S
30
87°
68°
31
87°
66°
1
81°
63°
2
83°
67°
3
86°
62°
4
88°
67°
5
87°
68°
6
86°
66°
7
86°
61°
8
80°
60°
9
81°
59°
10
84°
60°
11
85°
60°
12
84°
64°
13
83°
65°
14
84°
64°
15
83°
65°
16
84°
64°
17
82°
57°
18
78°
57°
19
75°
58°
20
76°
63°
21
76°
57°
22
77°
59°
23
76°
61°
24
75°
62°
25
76°
61°
26
81°
62°
27
81°
60°
28
80°
59°
29
76°
60°
30
74°
59°
1
75°
60°
2
74°
55°
3
75°
52°
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 74° to 88°, with overnight lows between 52° and 68°. The average high for September is 81° 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.
