S
M
T
W
T
F
S
30
98°
82°
31
100°
75°
1
99°
76°
2
98°
73°
3
98°
75°
4
100°
73°
5
99°
72°
6
92°
75°
7
96°
75°
8
99°
74°
9
95°
72°
10
102°
78°
11
103°
77°
12
103°
75°
13
100°
76°
14
97°
70°
15
101°
74°
16
102°
74°
17
101°
72°
18
100°
66°
19
96°
64°
20
96°
64°
21
95°
65°
22
97°
69°
23
98°
67°
24
97°
65°
25
86°
60°
26
86°
60°
27
84°
59°
28
85°
59°
29
86°
60°
30
89°
61°
1
88°
61°
2
89°
60°
3
90°
62°
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 84° to 103°, with overnight lows between 59° and 78°. The average high for September is 95° with an average low of 69°. 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.
