S
M
T
W
T
F
S
30
102°
78°
31
98°
75°
1
99°
73°
2
98°
71°
3
98°
72°
4
100°
74°
5
100°
74°
6
99°
72°
7
99°
71°
8
100°
74°
9
97°
71°
10
92°
69°
11
94°
67°
12
94°
70°
13
95°
71°
14
93°
71°
15
92°
67°
16
91°
63°
17
90°
63°
18
90°
64°
19
92°
64°
20
91°
66°
21
90°
64°
22
91°
65°
23
92°
67°
24
94°
65°
25
97°
64°
26
95°
69°
27
95°
66°
28
94°
65°
29
96°
70°
30
98°
67°
1
96°
66°
2
96°
66°
3
95°
65°
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 63° 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.
