S
M
T
W
T
F
S
30
77°
55°
31
81°
60°
1
82°
59°
2
82°
59°
3
81°
52°
4
78°
49°
5
74°
51°
6
74°
56°
7
79°
55°
8
80°
56°
9
79°
57°
10
74°
56°
11
79°
55°
12
78°
57°
13
79°
57°
14
78°
56°
15
79°
56°
16
79°
53°
17
77°
55°
18
77°
48°
19
75°
46°
20
71°
45°
21
68°
43°
22
68°
51°
23
69°
47°
24
71°
44°
25
67°
43°
26
67°
43°
27
70°
44°
28
73°
49°
29
72°
48°
30
73°
48°
1
67°
49°
2
67°
41°
3
66°
47°
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 66° to 82°, with overnight lows between 41° 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 Newton. See also: October | November | December.
