S
M
T
W
T
F
S
30
90°
73°
31
90°
73°
1
91°
72°
2
91°
73°
3
90°
73°
4
91°
72°
5
91°
73°
6
90°
73°
7
91°
72°
8
90°
73°
9
91°
73°
10
90°
72°
11
91°
73°
12
90°
72°
13
91°
73°
14
91°
74°
15
90°
74°
16
91°
73°
17
91°
74°
18
90°
74°
19
91°
73°
20
91°
73°
21
90°
74°
22
91°
74°
23
90°
73°
24
91°
74°
25
90°
73°
26
90°
74°
27
91°
73°
28
91°
74°
29
90°
74°
30
91°
73°
1
91°
74°
2
90°
74°
3
90°
73°
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 91°, with overnight lows between 72° and 74°. The average high for September is 91° with an average low of 73°. 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.
