S
M
T
W
T
F
S
30
77°
57°
31
N/A
1
82°
67°
2
74°
68°
3
83°
63°
4
82°
60°
5
77°
58°
6
74°
53°
7
76°
56°
8
76°
54°
9
78°
59°
10
80°
57°
11
80°
54°
12
73°
52°
13
73°
52°
14
77°
55°
15
71°
54°
16
71°
57°
17
73°
49°
18
69°
48°
19
68°
48°
20
70°
51°
21
74°
55°
22
77°
56°
23
78°
55°
24
77°
54°
25
75°
51°
26
74°
52°
27
75°
53°
28
75°
53°
29
74°
50°
30
68°
46°
1
65°
45°
2
67°
49°
3
72°
51°
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 65° to 83°, with overnight lows between 45° and 68°. The average high for September is 74° with an average low of 54°. 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.
