S
M
T
W
T
F
S
30
80°
62°
31
81°
64°
1
83°
64°
2
81°
63°
3
84°
63°
4
82°
55°
5
79°
55°
6
80°
56°
7
81°
57°
8
86°
60°
9
85°
61°
10
85°
57°
11
78°
52°
12
78°
56°
13
80°
53°
14
82°
53°
15
76°
54°
16
75°
53°
17
74°
52°
18
76°
53°
19
80°
51°
20
75°
55°
21
80°
54°
22
79°
58°
23
81°
56°
24
81°
56°
25
80°
55°
26
80°
57°
27
79°
56°
28
80°
56°
29
80°
52°
30
77°
53°
1
78°
55°
2
79°
52°
3
79°
45°
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 74° to 86°, with overnight lows between 45° and 64°. The average high for September is 80° with an average low of 56°. 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.
