S
M
T
W
T
F
S
30
96°
70°
31
96°
71°
1
97°
70°
2
95°
70°
3
95°
69°
4
94°
68°
5
95°
68°
6
94°
69°
7
99°
75°
8
96°
68°
9
96°
67°
10
95°
68°
11
93°
66°
12
94°
67°
13
94°
67°
14
97°
69°
15
100°
70°
16
101°
70°
17
99°
69°
18
99°
74°
19
101°
73°
20
101°
76°
21
102°
71°
22
90°
69°
23
90°
69°
24
95°
68°
25
96°
68°
26
94°
67°
27
95°
66°
28
96°
68°
29
96°
71°
30
97°
72°
1
95°
70°
2
93°
68°
3
94°
69°
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 90° to 102°, with overnight lows between 66° and 76°. The average high for September is 96° 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.
