S
M
T
W
T
F
S
30
110°
89°
31
110°
91°
1
105°
85°
2
105°
81°
3
103°
82°
4
104°
84°
5
105°
84°
6
95°
84°
7
98°
78°
8
108°
79°
9
116°
86°
10
117°
90°
11
115°
95°
12
115°
91°
13
113°
89°
14
107°
80°
15
107°
76°
16
105°
86°
17
103°
84°
18
102°
82°
19
106°
76°
20
106°
72°
21
101°
76°
22
100°
75°
23
108°
75°
24
108°
77°
25
107°
79°
26
105°
82°
27
107°
79°
28
99°
77°
29
103°
79°
30
107°
77°
1
111°
77°
2
109°
78°
3
108°
76°
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 76° and 82°. The average high for September is 106° with an average low of 78°. 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.
