Las Vegas (Vegas) weather in August

August in Las Vegas: sweltering, dry, with clean air — not the time — 39°C afternoons.

Updated September 2026 · climate normals from ERA5 reanalysis

Las Vegas🇺🇸 United States · Desert Southwest · City40
  1. 71Jan
  2. 81Feb
  3. 94Mar
  4. 92Apr
  5. 78May
  6. 46Jun
  7. 31Jul
  8. 40Aug
  9. 61Sep
  10. 89Oct
  11. 86Nov
  12. 73Dec

#11 of 12 months in Las Vegas · #1293 of 1413 destinations to visit in August · comfort 40/100 (tier F)

Days
40°C
Nights
27°C
Wet days
1
Sun
12.3 h
Humidity
25%
Daylight
14 h
Las Vegas, United States
Photo: Giorgio Caso · Pexels

Traveller notes on Las Vegas in August

Other months in Las Vegas

Regulars are consistent that the dry heat here is a real, meaningfully different experience than a humid climate at the same temperature - sauna heat rather than steam room heat, with sweat evaporating fast enough that feeling sticky isn't really a problem. Our row backs the dry read directly, 32.1C reading as a real 29C, over 19.5C nights, with rain almost entirely absent, 4.5mm across under a day, and humidity down to a desert-dry 21 percent. Regulars are specific that the first two weeks tend to run more comfortable, with the back half of the month often pushing toward 100 Fahrenheit and nights that stay warmer too as the month wears on. The record: 12.9 hours of sun, a 16.7 kph wind and AQI 64.
SaunaHeatNotSteamRoomHeat · May · 1 month ago · Read more on Tripadvisor ↗
February is the month regulars warn is not a pool holiday. Most resort pools are closed for the season; a handful of the big properties keep a heated one open, and if yours is shut you are usually told at check-in which neighbour will have you. Outdoor dining and club terraces are largely closed too, and walking the strip after dark is genuinely unpleasant. Our row shows why: 18C by day reads as 14C, and 6.8C at night reads as 3C, on 40 percent humidity and a dew point of minus 4.9C - desert air keeps nothing after sunset. Rain is 14mm across 1.9 days. The record: 9.4 hours of sun, a 14.4 kph wind and AQI 43.
MostPoolsAreShut · February · 1 month ago · Read more on Tripadvisor ↗
Regulars describe November here as sunny days and cool, often windy nights, and the numbers are starker than that sounds. Our row gives 20.9C by day but a felt 18C, and 9.1C at night that feels like 5C - a desert November at 34 percent humidity with a dew point of minus 4.1C loses its heat the moment the sun goes. Their verdict on the pools is worth having before booking: mid-November is very iffy even where the water is heated, and several resorts keep only one pool open. Rain is 6.7mm in the month. Take a light layer for the day and a proper coat for the evening. The record: 8.9 hours of sun, a 12.6 kph wind and AQI 38.
SunnyDayColdNight · November · 1 month ago · Read more on Tripadvisor ↗
March is the month the Las Vegas forum calls the most erratic of the year - 80s one year, struggling out of the 50s the next - with an average high near 70F, an average low near 45F, and a reputation as one of the windier, cloudier months. Wind and cloud together make it feel a good deal cooler than the number suggests. The practical question is the pools: many open by mid-March for spring break, and the realistic expectation for the end of the month is a mix of pool days and days too cool for it. Pack layers and keep an indoor plan. The record: 21.8C days that feel like 18C, 10.3C nights, 2 precipitation days, humidity 36 percent and 10.5 hours of sun.
PoolDaysAndNotPoolDays · March · 1 month ago · Read more on Tripadvisor ↗

Year-round notes are on Las Vegas's overview. Add your own note from Las Vegas's card on the map.

Las Vegas climate normals — August

Daytime high40°C / 105°F🔥 sweltering
Nighttime low27°C / 81°F
Feels like (high)39°C / 102°F
Rainfall9 mm / 0.4 in☀️ dry
Rainy days1 days
Humidity25%🌵 dry
Dew point6°C / 44°F
Sunshine12.3 h/day
Daylight13.5 h
Wind16 km/h / 10 mph
Air quality (US AQI)48🍃 good

Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.

Crowds in Las Vegas in August

How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.

BusySummer break in United States, school holidays in 2 of the markets that fill it(estimated)

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Peak crowdsBusyShoulder seasonQuiet

Best months for Las Vegas's weather

Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).

Toughest weatherLas Vegas's best weather comes in March, April and October — separate windows, not one continuous season.

August coincides with Extreme heat.

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Best weatherFair weatherToughest weather

What's on in Las Vegas in August

Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.

  • Hazard

    Extreme heat

    1 Jun – 10 Sep · usually

    Three months when the desert around the city is genuinely dangerous on foot after mid-morning, and heat warnings run for days at a time. Source ↗

  • Season

    North American monsoon

    1 Jul – 15 Sep · usuallyFlood season

    Summer moisture builds into short violent storms that flash-flood the washes and canyons around the city, often from rain that fell miles away.

What's on around the world in August →

Nearby, and something's on

Within 300 km of Las Vegas — a day trip or a short hop — with something on this month. Never part of the comfort score.

Where is Las Vegas?

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Las Vegas in August — FAQ

Is August a good time to visit Las Vegas?
August in Las Vegas: sweltering, dry, with clean air — not the time — 39°C afternoons. It ranks #11 of 12 months for Las Vegas on SeasonMap's comfort score (40/100).
What is the weather like in Las Vegas in August?
In August, Las Vegas averages a daily high of 40.4°C and a low of 27.4°C, with about 8.9 mm of rain over roughly 1.3 rainy days.
What is the air quality in Las Vegas in August?
Las Vegas has a mean US Air Quality Index of about 48 in August.

Within 300 km: Zion National Park's California condors over the canyon on 1 Jan – 31 Dec, and Joshua Tree National Park's Perseids and new-moon nights around 25 Jul – 20 Aug.