S
M
T
W
T
F
S
30
76°
52°
31
77°
54°
1
76°
54°
2
76°
53°
3
75°
45°
4
68°
43°
5
67°
47°
6
69°
52°
7
75°
53°
8
75°
52°
9
71°
47°
10
68°
51°
11
73°
50°
12
73°
52°
13
72°
52°
14
73°
51°
15
74°
50°
16
73°
49°
17
67°
48°
18
72°
42°
19
64°
40°
20
64°
40°
21
61°
38°
22
62°
46°
23
63°
43°
24
62°
38°
25
61°
38°
26
61°
43°
27
67°
44°
28
68°
45°
29
67°
44°
30
66°
44°
1
59°
43°
2
64°
36°
3
59°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Lyndon
Lyndon's September 2026 forecast shows daily high temperatures ranging from 59° to 77°, with overnight lows between 36° and 54°. The average high for September is 69° with an average low of 46°. 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 Lyndon. See also: October | November | December.
