S
M
T
W
T
F
S
30
76°
48°
31
77°
47°
1
74°
47°
2
74°
49°
3
75°
51°
4
73°
50°
5
75°
48°
6
74°
49°
7
72°
47°
8
73°
46°
9
72°
47°
10
73°
53°
11
72°
46°
12
72°
46°
13
76°
44°
14
73°
51°
15
74°
51°
16
72°
45°
17
70°
43°
18
70°
43°
19
71°
48°
20
73°
50°
21
74°
48°
22
69°
47°
23
74°
48°
24
71°
46°
25
72°
47°
26
66°
39°
27
71°
41°
28
65°
40°
29
65°
40°
30
Hist. Avg.
65°
48°
1
Hist. Avg.
65°
48°
2
Hist. Avg.
64°
47°
3
Hist. Avg.
64°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in New Boston
New Boston's September 2026 forecast shows daily high temperatures ranging from 65° to 77°, with overnight lows between 39° and 53°. The average high for September is 72° with an average low of 47°. 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.
