S
M
T
W
T
F
S
30
77°
55°
31
81°
56°
1
82°
56°
2
82°
55°
3
81°
49°
4
80°
46°
5
73°
48°
6
74°
54°
7
76°
54°
8
80°
53°
9
78°
54°
10
79°
53°
11
78°
51°
12
78°
52°
13
77°
53°
14
77°
53°
15
78°
52°
16
78°
47°
17
77°
52°
18
74°
50°
19
76°
47°
20
72°
43°
21
68°
40°
22
68°
47°
23
69°
46°
24
73°
41°
25
67°
39°
26
66°
39°
27
67°
45°
28
72°
46°
29
71°
42°
30
71°
42°
1
63°
44°
2
64°
37°
3
67°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in New Boston
New Boston's September 2026 forecast shows daily high temperatures ranging from 63° to 82°, with overnight lows between 37° and 56°. The average high for September is 74° with an average low of 48°. 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 New Boston. See also: October | November | December.
