S
M
T
W
T
F
S
30
77°
54°
31
81°
59°
1
82°
59°
2
82°
58°
3
81°
51°
4
78°
48°
5
74°
50°
6
74°
55°
7
79°
56°
8
80°
55°
9
79°
56°
10
74°
54°
11
79°
54°
12
78°
56°
13
79°
56°
14
78°
55°
15
79°
55°
16
79°
52°
17
77°
54°
18
77°
47°
19
75°
45°
20
72°
44°
21
68°
42°
22
68°
50°
23
70°
46°
24
71°
43°
25
67°
42°
26
67°
42°
27
70°
43°
28
73°
48°
29
72°
47°
30
73°
47°
1
67°
48°
2
67°
40°
3
66°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Glen Lyon
Glen Lyon's September 2026 forecast shows daily high temperatures ranging from 66° to 82°, with overnight lows between 40° and 59°. The average high for September is 75° with an average low of 50°. 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 Glen Lyon. See also: October | November | December.
