S
M
T
W
T
F
S
30
75°
53°
31
76°
58°
1
78°
59°
2
74°
60°
3
82°
60°
4
83°
58°
5
79°
53°
6
77°
50°
7
74°
53°
8
80°
56°
9
79°
54°
10
78°
56°
11
75°
49°
12
73°
51°
13
75°
55°
14
79°
49°
15
72°
52°
16
70°
54°
17
69°
51°
18
70°
50°
19
74°
45°
20
70°
49°
21
72°
46°
22
73°
49°
23
73°
45°
24
75°
45°
25
75°
51°
26
74°
51°
27
73°
52°
28
74°
51°
29
74°
44°
30
67°
47°
1
72°
51°
2
74°
48°
3
72°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in West Newton
West Newton's September 2026 forecast shows daily high temperatures ranging from 67° to 83°, with overnight lows between 44° and 60°. The average high for September is 75° 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 West Newton. See also: October | November | December.