S
M
T
W
T
F
S
30
76°
53°
31
82°
55°
1
83°
47°
2
82°
48°
3
75°
47°
4
76°
49°
5
77°
55°
6
80°
53°
7
82°
48°
8
74°
53°
9
73°
54°
10
75°
53°
11
78°
52°
12
78°
51°
13
72°
52°
14
71°
45°
15
73°
45°
16
71°
44°
17
71°
47°
18
70°
49°
19
76°
50°
20
72°
51°
21
75°
48°
22
73°
41°
23
69°
47°
24
67°
50°
25
73°
44°
26
65°
44°
27
72°
47°
28
73°
46°
29
Hist. Avg.
65°
48°
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 83°, with overnight lows between 41° and 55°. The average high for September is 74° with an average low of 49°. 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.
