S
M
T
W
T
F
S
30
94°
65°
31
88°
64°
1
84°
68°
2
81°
62°
3
80°
59°
4
80°
59°
5
81°
62°
6
82°
65°
7
83°
68°
8
80°
67°
9
79°
67°
10
85°
66°
11
81°
67°
12
79°
63°
13
78°
56°
14
77°
55°
15
78°
56°
16
78°
58°
17
79°
58°
18
81°
63°
19
82°
64°
20
83°
64°
21
85°
63°
22
85°
64°
23
86°
64°
24
84°
63°
25
82°
62°
26
83°
61°
27
82°
62°
28
85°
49°
29
80°
47°
30
70°
50°
1
71°
46°
2
75°
51°
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 70° to 94°, with overnight lows between 46° and 68°. The average high for September is 81° with an average low of 60°. 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.
