S
M
T
W
T
F
S
30
92°
68°
31
92°
68°
1
93°
67°
2
93°
69°
3
92°
68°
4
92°
68°
5
91°
67°
6
91°
61°
7
88°
59°
8
81°
64°
9
82°
65°
10
81°
66°
11
84°
65°
12
88°
66°
13
88°
57°
14
87°
55°
15
81°
55°
16
76°
54°
17
76°
55°
18
78°
59°
19
79°
53°
20
77°
52°
21
76°
57°
22
77°
60°
23
81°
60°
24
83°
61°
25
84°
61°
26
84°
59°
27
85°
60°
28
81°
56°
29
80°
55°
30
80°
55°
1
79°
54°
2
82°
57°
3
73°
46°
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 73° to 93°, with overnight lows between 46° and 69°. The average high for September is 84° 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.
