S
M
T
W
T
F
S
30
75°
59°
31
75°
57°
1
76°
58°
2
76°
57°
3
77°
58°
4
78°
57°
5
77°
56°
6
76°
57°
7
74°
55°
8
75°
54°
9
73°
57°
10
73°
54°
11
74°
53°
12
73°
53°
13
75°
60°
14
76°
55°
15
77°
55°
16
78°
59°
17
78°
60°
18
80°
59°
19
79°
50°
20
74°
50°
21
68°
56°
22
69°
55°
23
72°
57°
24
74°
58°
25
75°
48°
26
74°
46°
27
70°
48°
28
65°
47°
29
65°
47°
30
64°
45°
1
Hist. Avg.
68°
49°
2
Hist. Avg.
68°
49°
3
Hist. Avg.
68°
49°
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 64° to 80°, with overnight lows between 45° and 60°. The average high for September is 74° with an average low of 54°. 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.
