S
M
T
W
T
F
S
30
98°
82°
31
100°
75°
1
96°
77°
2
95°
74°
3
95°
73°
4
96°
75°
5
97°
74°
6
84°
75°
7
94°
70°
8
98°
73°
9
104°
81°
10
106°
81°
11
106°
85°
12
103°
82°
13
104°
79°
14
102°
76°
15
100°
77°
16
100°
79°
17
100°
75°
18
103°
76°
19
104°
74°
20
103°
73°
21
100°
72°
22
93°
71°
23
94°
67°
24
93°
70°
25
93°
66°
26
86°
62°
27
91°
62°
28
90°
60°
29
86°
60°
30
90°
63°
1
89°
65°
2
87°
60°
3
85°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Las Vegas
Las Vegas's September 2026 forecast shows daily high temperatures ranging from 85° to 104°, with overnight lows between 60° and 82°. The average high for September is 95° with an average low of 70°. 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 Las Vegas. See also: October | November | December.
