S
M
T
W
T
F
S
30
94°
71°
31
92°
70°
1
91°
70°
2
88°
69°
3
88°
70°
4
91°
70°
5
90°
69°
6
91°
70°
7
90°
67°
8
90°
67°
9
89°
55°
10
90°
63°
11
79°
68°
12
88°
67°
13
91°
55°
14
92°
53°
15
78°
53°
16
75°
55°
17
74°
61°
18
76°
63°
19
79°
61°
20
82°
59°
21
84°
60°
22
86°
60°
23
85°
57°
24
84°
61°
25
84°
62°
26
83°
52°
27
84°
48°
28
73°
49°
29
71°
50°
30
72°
49°
1
71°
48°
2
72°
49°
3
71°
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 71° to 94°, with overnight lows between 48° and 71°. The average high for September is 83° with an average low of 60°. 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.
