S
M
T
W
T
F
S
30
101°
75°
31
99°
74°
1
91°
67°
2
90°
67°
3
90°
66°
4
91°
68°
5
92°
69°
6
85°
67°
7
91°
68°
8
91°
68°
9
90°
69°
10
91°
69°
11
91°
68°
12
90°
67°
13
88°
65°
14
86°
63°
15
88°
67°
16
89°
68°
17
87°
65°
18
78°
63°
19
76°
61°
20
75°
62°
21
80°
57°
22
84°
63°
23
85°
61°
24
73°
56°
25
71°
56°
26
71°
58°
27
72°
60°
28
72°
60°
29
74°
59°
30
75°
59°
1
81°
56°
2
72°
58°
3
82°
61°
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 101°, with overnight lows between 56° and 75°. The average high for September is 84° with an average low of 64°. 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.
