S
M
T
W
T
F
S
30
107°
83°
31
110°
84°
1
111°
82°
2
106°
76°
3
104°
76°
4
105°
80°
5
106°
80°
6
107°
82°
7
109°
80°
8
105°
77°
9
106°
74°
10
104°
73°
11
104°
73°
12
105°
74°
13
107°
73°
14
106°
72°
15
103°
79°
16
104°
77°
17
99°
79°
18
100°
78°
19
99°
78°
20
99°
77°
21
100°
77°
22
104°
78°
23
103°
78°
24
104°
77°
25
106°
76°
26
106°
75°
27
105°
72°
28
104°
71°
29
102°
73°
30
102°
74°
1
104°
75°
2
105°
74°
3
104°
72°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Death Valley
Death Valley's September 2026 forecast shows daily high temperatures ranging from 99° to 111°, with overnight lows between 71° and 84°. The average high for September is 104° with an average low of 77°. 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 Death Valley. See also: October | November | December.
