S
M
T
W
T
F
S
30
77°
34°
31
75°
37°
1
72°
45°
2
66°
41°
3
72°
36°
4
72°
43°
5
72°
34°
6
72°
41°
7
73°
27°
8
79°
32°
9
84°
45°
10
77°
51°
11
82°
43°
12
81°
44°
13
79°
36°
14
77°
37°
15
80°
46°
16
79°
46°
17
83°
50°
18
82°
49°
19
81°
46°
20
76°
44°
21
75°
41°
22
77°
45°
23
74°
44°
24
70°
44°
25
66°
39°
26
68°
44°
27
67°
40°
28
66°
40°
29
68°
43°
30
73°
45°
1
74°
46°
2
74°
46°
3
73°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Lee Vining
Lee Vining's September 2026 forecast shows daily high temperatures ranging from 66° to 83°, with overnight lows between 36° and 51°. The average high for September is 75° with an average low of 44°. 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 Lee Vining. See also: October | November | December.