S
M
T
W
T
F
S
30
74°
57°
31
75°
58°
1
79°
54°
2
76°
55°
3
77°
51°
4
76°
50°
5
75°
50°
6
80°
56°
7
80°
56°
8
79°
55°
9
80°
56°
10
78°
55°
11
77°
55°
12
79°
54°
13
79°
55°
14
78°
55°
15
79°
53°
16
78°
46°
17
72°
49°
18
69°
53°
19
74°
52°
20
77°
53°
21
75°
51°
22
75°
45°
23
74°
49°
24
67°
50°
25
68°
51°
26
Hist. Avg.
70°
50°
27
Hist. Avg.
70°
50°
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 67° to 80°, with overnight lows between 45° and 58°. The average high for September is 76° with an average low of 53°. 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.
