S
M
T
W
T
F
S
30
80°
49°
31
77°
52°
1
73°
55°
2
74°
56°
3
73°
56°
4
75°
52°
5
80°
47°
6
77°
45°
7
87°
49°
8
93°
52°
9
100°
58°
10
98°
65°
11
95°
56°
12
81°
50°
13
76°
54°
14
90°
46°
15
82°
50°
16
75°
53°
17
77°
51°
18
86°
51°
19
89°
48°
20
80°
53°
21
83°
54°
22
83°
53°
23
90°
53°
24
89°
54°
25
87°
55°
26
86°
54°
27
85°
55°
28
84°
53°
29
84°
53°
30
83°
51°
1
84°
53°
2
78°
53°
3
84°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Glen Ellen
Glen Ellen's September 2026 forecast shows daily high temperatures ranging from 77° to 90°, with overnight lows between 48° and 55°. The average high for September is 84° 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 Glen Ellen. See also: October | November | December.
