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
84°
46°
11
79°
41°
12
81°
27°
13
77°
50°
14
73°
39°
15
78°
41°
16
75°
42°
17
74°
38°
18
76°
40°
19
77°
44°
20
79°
46°
21
75°
45°
22
74°
42°
23
72°
44°
24
70°
43°
25
70°
43°
26
69°
44°
27
70°
43°
28
72°
42°
29
66°
42°
30
67°
42°
1
70°
46°
2
70°
41°
3
71°
44°
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 79°, with overnight lows between 38° and 46°. The average high for September is 72° with an average low of 43°. 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.