S
M
T
W
T
F
S
30
81°
65°
31
83°
64°
1
83°
58°
2
84°
56°
3
79°
56°
4
79°
58°
5
82°
60°
6
87°
66°
7
89°
67°
8
89°
61°
9
83°
57°
10
81°
59°
11
80°
66°
12
84°
60°
13
88°
54°
14
79°
56°
15
79°
61°
16
84°
63°
17
86°
59°
18
85°
58°
19
79°
61°
20
85°
61°
21
86°
60°
22
85°
61°
23
84°
61°
24
83°
60°
25
84°
60°
26
81°
59°
27
83°
59°
28
83°
58°
29
82°
59°
30
82°
59°
1
81°
48°
2
82°
47°
3
79°
48°
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 79° to 89°, with overnight lows between 47° and 67°. The average high for September is 83° with an average low of 59°. 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.
