S
M
T
W
T
F
S
30
84°
57°
31
86°
56°
1
85°
55°
2
86°
55°
3
89°
54°
4
83°
56°
5
83°
56°
6
84°
53°
7
88°
57°
8
89°
57°
9
89°
58°
10
90°
58°
11
89°
57°
12
85°
56°
13
83°
57°
14
82°
55°
15
83°
55°
16
86°
57°
17
88°
58°
18
90°
56°
19
89°
55°
20
89°
56°
21
88°
56°
22
88°
55°
23
85°
55°
24
84°
54°
25
86°
55°
26
87°
56°
27
87°
55°
28
86°
55°
29
83°
52°
30
86°
55°
1
83°
50°
2
77°
47°
3
78°
47°
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 47° and 58°. The average high for September is 86° with an average low of 55°. 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.
