S
M
T
W
T
F
S
30
79°
55°
31
83°
58°
1
83°
50°
2
81°
49°
3
75°
50°
4
77°
53°
5
80°
58°
6
81°
53°
7
81°
49°
8
74°
52°
9
74°
56°
10
73°
56°
11
78°
54°
12
77°
53°
13
72°
54°
14
71°
47°
15
71°
46°
16
72°
45°
17
71°
49°
18
71°
50°
19
74°
52°
20
72°
53°
21
74°
50°
22
71°
43°
23
68°
49°
24
67°
52°
25
72°
46°
26
66°
46°
27
69°
49°
28
Hist. Avg.
70°
49°
29
Hist. Avg.
69°
49°
30
Hist. Avg.
69°
48°
1
Hist. Avg.
68°
48°
2
Hist. Avg.
68°
47°
3
Hist. Avg.
67°
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 66° to 83°, with overnight lows between 43° and 58°. The average high for September is 74° with an average low of 51°. 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.
