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
94°
69°
16
92°
70°
17
98°
72°
18
98°
71°
19
99°
71°
20
78°
65°
21
76°
63°
22
79°
58°
23
N/A
24
N/A
25
78°
63°
26
82°
64°
27
N/A
28
84°
64°
29
77°
68°
30
76°
67°
1
74°
55°
2
71°
53°
3
72°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Newton
Newton's September 2026 forecast shows daily high temperatures ranging from 71° to 77°, with overnight lows between 50° and 68°. The average high for September is 74° 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.
