S
M
T
W
T
F
S
30
90°
69°
31
84°
69°
1
90°
71°
2
89°
71°
3
92°
70°
4
91°
70°
5
87°
69°
6
84°
68°
7
82°
68°
8
85°
67°
9
82°
67°
10
79°
66°
11
79°
66°
12
85°
67°
13
86°
67°
14
81°
66°
15
82°
66°
16
80°
65°
17
76°
65°
18
78°
64°
19
80°
65°
20
82°
65°
21
85°
55°
22
83°
55°
23
83°
56°
24
84°
55°
25
80°
55°
26
79°
54°
27
73°
63°
28
85°
59°
29
82°
55°
30
85°
49°
1
82°
51°
2
70°
54°
3
69°
53°
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 69° to 92°, with overnight lows between 49° and 71°. The average high for September is 82° with an average low of 63°. 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.
