S
M
T
W
T
F
S
30
73°
55°
31
74°
58°
1
79°
58°
2
79°
56°
3
78°
51°
4
78°
56°
5
77°
52°
6
77°
51°
7
70°
54°
8
68°
55°
9
69°
50°
10
75°
47°
11
69°
55°
12
72°
49°
13
75°
51°
14
72°
47°
15
67°
53°
16
73°
51°
17
Hist. Avg.
71°
49°
18
Hist. Avg.
70°
49°
19
Hist. Avg.
70°
48°
20
Hist. Avg.
69°
48°
21
Hist. Avg.
69°
48°
22
Hist. Avg.
69°
47°
23
Hist. Avg.
68°
47°
24
Hist. Avg.
68°
47°
25
Hist. Avg.
67°
46°
26
Hist. Avg.
67°
46°
27
Hist. Avg.
66°
45°
28
Hist. Avg.
66°
45°
29
Hist. Avg.
66°
45°
30
Hist. Avg.
65°
44°
1
Hist. Avg.
65°
44°
2
Hist. Avg.
64°
44°
3
Hist. Avg.
64°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Lyndeborough
Lyndeborough's September 2026 forecast shows daily high temperatures ranging from 67° to 79°, with overnight lows between 47° and 58°. The average high for September is 74° 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 Lyndeborough. See also: October | November | December.
