S
M
T
W
T
F
S
30
98°
82°
31
100°
75°
1
96°
77°
2
95°
74°
3
95°
73°
4
96°
75°
5
97°
74°
6
84°
75°
7
94°
70°
8
98°
73°
9
105°
83°
10
108°
85°
11
106°
84°
12
105°
80°
13
100°
76°
14
99°
72°
15
100°
75°
16
99°
76°
17
102°
75°
18
101°
75°
19
101°
74°
20
99°
71°
21
100°
72°
22
94°
67°
23
87°
62°
24
87°
61°
25
86°
61°
26
86°
62°
27
91°
62°
28
91°
61°
29
88°
62°
30
91°
63°
1
94°
65°
2
94°
66°
3
93°
66°
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 86° to 108°, with overnight lows between 61° and 85°. The average high for September is 96° with an average low of 70°. 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.
