United States Las Vegas Weather in August — Climate Guide
August in Las Vegas is Difficult
Las Vegas Weather in August — Quick Answer
As of 2026- Avg temp
- 40° / 26°
- Rainfall
- 12mm · 2 days
- Crowds
- Very busy
As of 2026, Las Vegas in August averages a high of 40°C and low of 26°C with 12mm of rain over about 2 days. Same as July — lightest clothing + hydration. Late August brings occasional dramatic monsoon thunderstorms (afternoon, 20-40 min, lightning).
August is Difficult for Las Vegas.
August is similar to July with slightly cooler nighttime lows and more thunderstorm activity. The yearly monsoon season (July-September) brings occasional dramatic thunderstorms with lightning — typically afternoon, lasting 20-40 minutes, with sudden flash-flood risk in the surrounding canyons.
US school resumes mid-August (most states open August 15-25) — crowds drop slightly in the second half. Hotel prices start declining late August as families return home. By the last week of August, the value-to-weather ratio improves — same heat, lower prices.
Travel score
Las Vegas August Weather Stats
Avg High
40°C
Avg Low
26°C
Rainy Days
2
12mm total
Sunshine
11.5h
Daily avg
Humidity
32%
Very Hot
UV Index
10
Very high
Wind
12 km/h
Gusts 28
Sea Temp
0°C
Avg water temp
Crowds
Very busy
At attractions
August Sunrise & Sunset
Air Quality
PM2.5
45 μg/m³
PM10
90 μg/m³
Status
moderate
Feels-Like Temperature & Wind
Feels like
Daytime
44°C
Nighttime
26°C
Humidity and wind affect how the actual temperature feels.
Wind
12 km/h
Max gust 28 km/h
Activities Recommended for August
August Travel Pros & Cons
Pros
- Hotel prices start declining mid-month
- Restaurant Week prix-fixe deals mid-August
- Pool culture continues
Cons
- Continued extreme heat
- Outdoor activities still off-limits
- Thunderstorm afternoon disruptions + flash floods
August Events & Festivals
- Monsoon season — thunderstorms possible afternoons
- School-out crowds continue
- Hotel prices start dropping mid-August
- Restaurant Week (mid-August)
Las Vegas in August — Full Picture
August is similar to July with slightly cooler nighttime lows and more thunderstorm activity. The yearly monsoon season (July-September) brings occasional dramatic thunderstorms with lightning — typically afternoon, lasting 20-40 minutes, with sudden flash-flood risk in the surrounding canyons.
US school resumes mid-August (most states open August 15-25) — crowds drop slightly in the second half. Hotel prices start declining late August as families return home. By the last week of August, the value-to-weather ratio improves — same heat, lower prices.
Grand Canyon West and other outdoor day trips are still mostly dangerous for daytime visits. Pool and dayclub culture is at sustained peak. Las Vegas Restaurant Week (mid-August, 1 week) brings Michelin-legacy chefs offering $30-80 prix-fixe menus that would normally cost $150-300 — the smart August dining play.
For active travelers, August is the harder month; for pool + spa + casino visitors who want luxury room pricing, August's last week offers genuine value (4-star Strip $80-130, 5-star Wynn $250-400 — significant discounts from peak).
What to Wear & What to Pack
Same as July — lightest clothing + hydration. Late August brings occasional dramatic monsoon thunderstorms (afternoon, 20-40 min, lightning).
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
26.7°C
13.3°C
1.3/mo
Summer (Jun·Jul·Aug)
Current39.7°C
25.7°C
1/mo
Autumn (Sep·Oct·Nov)
27°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 August Hotel Picks
Frequently Asked Questions
Is August a good time to visit Las Vegas?
Las Vegas in August is Difficult. Tourist crowds are very busy and flight/hotel prices are peak.
What's the average temperature in Las Vegas in August?
Las Vegas August averages a high of 40°C and a low of 26°C.
Does it rain much in Las Vegas in August?
Las Vegas August averages 12mm of rainfall over about 2 rainy days.
What should I wear in Las Vegas in August?
Same as July — lightest clothing + hydration. Late August brings occasional dramatic monsoon thunderstorms (afternoon, 20-40 min, lightning).
What time are sunrise and sunset in Las Vegas in August?
Las Vegas August sunrise is 05:55 and sunset is 19:25, with 13h 30m of daylight.
What's the air quality like in Las Vegas in August?
Las Vegas August air quality (AQI) averages 95, rated Moderate. PM2.5 averages 45μg/m³.
What activities are recommended in Las Vegas in August?
In August, Las Vegas is great for Pool + dayclubs, Indoor everything, Late-night Strip.
Is August peak season in Las Vegas?
Las Vegas August crowds are very busy and prices are peak. Advance reservations are strongly recommended.
Best Months to Visit Las Vegas
View Other Months
Planning a August trip to Las Vegas?
You've checked the weather — next come the budget and the route.
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.