S
M
T
W
T
F
S
30
88°
58°
31
86°
57°
1
81°
55°
2
85°
55°
3
86°
54°
4
85°
63°
5
85°
59°
6
87°
61°
7
88°
60°
8
86°
55°
9
85°
56°
10
81°
50°
11
88°
57°
12
87°
56°
13
85°
57°
14
82°
58°
15
81°
54°
16
76°
53°
17
73°
53°
18
69°
49°
19
72°
48°
20
73°
50°
21
75°
50°
22
72°
49°
23
69°
46°
24
63°
53°
25
70°
49°
26
71°
48°
27
68°
49°
28
67°
48°
29
69°
43°
30
71°
45°
1
74°
46°
2
74°
46°
3
73°
45°
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 63° to 88°, with overnight lows between 43° and 58°. The average high for September is 74° with an average low of 50°. 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.
