S
M
T
W
T
F
S
30
92°
58°
31
92°
57°
1
91°
58°
2
90°
60°
3
91°
57°
4
90°
57°
5
89°
51°
6
87°
48°
7
80°
52°
8
81°
52°
9
86°
56°
10
88°
55°
11
89°
54°
12
87°
54°
13
87°
55°
14
86°
50°
15
84°
49°
16
79°
52°
17
85°
54°
18
87°
53°
19
87°
55°
20
86°
54°
21
85°
53°
22
77°
51°
23
74°
47°
24
80°
47°
25
80°
45°
26
79°
45°
27
76°
46°
28
74°
44°
29
74°
41°
30
73°
45°
1
72°
51°
2
77°
51°
3
80°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Yosemite Valley
Yosemite Valley's September 2026 forecast shows daily high temperatures ranging from 72° to 92°, with overnight lows between 41° and 60°. The average high for September is 83° with an average low of 52°. 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 Yosemite Valley. See also: October | November | December.
