S
M
T
W
T
F
S
30
78°
53°
31
77°
53°
1
76°
54°
2
77°
55°
3
75°
56°
4
74°
54°
5
77°
54°
6
76°
54°
7
75°
52°
8
74°
51°
9
73°
52°
10
74°
56°
11
73°
50°
12
73°
51°
13
74°
50°
14
75°
56°
15
76°
56°
16
75°
54°
17
72°
48°
18
71°
48°
19
71°
49°
20
75°
54°
21
70°
48°
22
70°
50°
23
73°
53°
24
74°
54°
25
75°
52°
26
74°
44°
27
72°
45°
28
66°
44°
29
65°
43°
30
65°
44°
1
Hist. Avg.
68°
46°
2
Hist. Avg.
68°
46°
3
Hist. Avg.
67°
46°
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 78°, with overnight lows between 43° and 56°. The average high for September is 73° with an average low of 51°. 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.
