United States Las Vegas Weather in September — Climate Guide
September in Las Vegas is Good
September is Good for Las Vegas.
September is the value transition. Labor Day weekend (first Monday Sept) is the unofficial summer end. After Labor Day, hotel prices drop 15-25% from August peak.
Weather still hot (35°C days) but more tolerable. Outdoor activities possible morning + evening. School-out crowds gone.
Travel score
Las Vegas September Weather Stats
Avg High
35°C
Avg Low
21°C
Rainy Days
1
6mm total
Sunshine
11h
Daily avg
Humidity
30%
Warm
UV Index
9
Very high
Wind
12 km/h
Gusts 26
Sea Temp
0°C
Avg water temp
Crowds
Busy
At attractions
September Sunrise & Sunset
Air Quality
PM2.5
38 μg/m³
PM10
76 μg/m³
Status
Moderate
Feels-Like Temperature & Wind
Feels like
Daytime
38°C
Nighttime
20°C
Humidity and wind affect how the actual temperature feels.
Wind
12 km/h
Max gust 26 km/h
Activities Recommended for September
September Travel Pros & Cons
Pros
- Hotel prices declining 15-25%
- School-out crowds gone
- Pool + outdoor activities still working
Cons
- Days still hot 35°C
- Day trips still limited daylight hours
- Antelope Canyon light beams ending
September Events & Festivals
- Labor Day weekend (1st Monday September)
- Hotel prices declining 15-25%
- Best post-summer value window
Las Vegas in September — Full Picture
September is the value transition. Labor Day weekend (first Monday Sept) is the unofficial summer end. After Labor Day, hotel prices drop 15-25% from August peak.
Weather still hot (35°C days) but more tolerable. Outdoor activities possible morning + evening. School-out crowds gone.
The smart-value pick — summer weather + early shoulder-season prices.
What to Wear & What to Pack
T-shirts + shorts. Evenings cool to 21°C — light layer. Sunscreen SPF 50+.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
26.7°C
13.3°C
1.3/mo
Summer (Jun·Jul·Aug)
39.7°C
25.7°C
1/mo
Autumn (Sep·Oct·Nov)
Current27°C
14°C
1.3/mo
Winter (Dec·Jan·Feb)
15°C
3.7°C
3/mo
Las Vegas Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| 14° | 3° | 3d·12mm | 7.5h | 47% | 3 | Moderate | Shoulder | |
| 17° | 5° | 3d·12mm | 8h | 41% | 4 | Moderate | Shoulder | |
| March (Best) | 22° | 9° | 2d·12mm | 9h | 35% | 6 | Busy | Peak |
| April (Best) | 26° | 13° | 1d·6mm | 10h | 28% | 8 | Busy | Peak |
| May (Best) | 32° | 18° | 1d·2mm | 11h | 23% | 10 | Busy | Peak |
| 38° | 24° | 0d·1mm | 11.5h | 19% | 11 | Very busy | Peak | |
| 41° | 27° | 1d·8mm | 12h | 28% | 11 | Very busy | Peak | |
| 40° | 26° | 2d·12mm | 11.5h | 32% | 10 | Very busy | Peak | |
| 35° | 21° | 1d·6mm | 11h | 30% | 9 | Busy | Shoulder | |
| October (Best) | 27° | 14° | 1d·5mm | 10h | 33% | 6 | Moderate | Shoulder |
| 19° | 7° | 2d·5mm | 9h | 39% | 4 | Moderate | Shoulder | |
| 14° | 3° | 3d·12mm | 7.5h | 47% | 3 | Very busy | Peak |
View Other Months
Las Vegas September Hotel Picks
Frequently Asked Questions
Is September a good time to visit Las Vegas?
Las Vegas in September is Good. Tourist crowds are busy and flight/hotel prices are shoulder.
What's the average temperature in Las Vegas in September?
Las Vegas September averages a high of 35°C and a low of 21°C.
Does it rain much in Las Vegas in September?
Las Vegas September averages 6mm of rainfall over about 1 rainy days.
What should I wear in Las Vegas in September?
T-shirts + shorts. Evenings cool to 21°C — light layer. Sunscreen SPF 50+.
What time are sunrise and sunset in Las Vegas in September?
Las Vegas September sunrise is 06:18 and sunset is 18:42, with 12h 24m of daylight.
What's the air quality like in Las Vegas in September?
Las Vegas September air quality (AQI) averages 85, rated Moderate. PM2.5 averages 38μg/m³.
What activities are recommended in Las Vegas in September?
In September, Las Vegas is great for Pool + last warm days, All Strip + Grand Canyon, Red Rock Canyon (morning).
Is September peak season in Las Vegas?
Las Vegas September crowds are busy and prices are shoulder. Advance reservations are strongly recommended.
Best Months to Visit Las Vegas
View Other Months
Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.