S
M
T
W
T
F
S
30
85°
52°
31
75°
50°
1
75°
54°
2
76°
55°
3
75°
50°
4
78°
58°
5
82°
57°
6
83°
50°
7
78°
50°
8
74°
49°
9
73°
47°
10
73°
55°
11
78°
48°
12
73°
48°
13
71°
47°
14
72°
54°
15
76°
53°
16
79°
45°
17
79°
44°
18
69°
43°
19
68°
45°
20
69°
48°
21
67°
47°
22
67°
44°
23
68°
48°
24
68°
47°
25
69°
50°
26
74°
50°
27
74°
43°
28
73°
41°
29
66°
45°
30
67°
48°
1
66°
49°
2
69°
46°
3
71°
40°
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 85°, with overnight lows between 40° and 58°. The average high for September is 73° 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 Glen Lyon. See also: October | November | December.
