S
M
T
W
T
F
S
30
71°
55°
31
71°
56°
1
68°
55°
2
67°
52°
3
67°
50°
4
66°
51°
5
67°
50°
6
68°
52°
7
69°
52°
8
70°
54°
9
70°
55°
10
69°
54°
11
66°
54°
12
64°
53°
13
65°
53°
14
65°
48°
15
63°
48°
16
63°
49°
17
64°
48°
18
63°
52°
19
63°
49°
20
62°
47°
21
62°
47°
22
63°
52°
23
66°
52°
24
66°
51°
25
65°
47°
26
64°
46°
27
62°
50°
28
61°
51°
29
60°
50°
30
60°
46°
1
61°
47°
2
60°
46°
3
60°
45°
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 60° to 71°, with overnight lows between 45° and 56°. The average high for September is 65° with an average low of 50°. 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.
