S
M
T
W
T
F
S
30
83°
62°
31
84°
66°
1
87°
65°
2
82°
61°
3
81°
60°
4
81°
59°
5
82°
58°
6
82°
59°
7
83°
59°
8
83°
60°
9
85°
64°
10
85°
61°
11
84°
60°
12
85°
64°
13
85°
64°
14
84°
63°
15
85°
64°
16
85°
62°
17
84°
63°
18
83°
61°
19
82°
60°
20
82°
59°
21
80°
60°
22
81°
54°
23
78°
58°
24
75°
59°
25
Hist. Avg.
80°
56°
26
Hist. Avg.
79°
55°
27
Hist. Avg.
79°
55°
28
Hist. Avg.
78°
54°
29
Hist. Avg.
78°
54°
30
Hist. Avg.
78°
53°
1
Hist. Avg.
78°
53°
2
Hist. Avg.
77°
52°
3
Hist. Avg.
77°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Newton
Newton's September 2026 forecast shows daily high temperatures ranging from 75° to 87°, with overnight lows between 54° and 66°. The average high for September is 83° with an average low of 61°. 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.
