Las Vegas in August: Weather, Crowds, Prices and How It Compares to September

LAS VEGAS · AUGUST · THE MONTH GUIDE

Las Vegas runs its second-hottest month on two numbers: an average high of 102.8°F and an average low of 80.6°F. Those come from NOAA’s 1991-2020 normals for the gauge at Las Vegas McCarran Airport, on the valley floor. Rain barely registers at all: 0.32 inches for the whole month.

The cost is the middle of the day, roughly noon to six. The compensation is daylight: 13 hours 34 minutes on August 15, sun up at 5:58 a.m. and light until 7:31 p.m., which puts every outdoor plan at the two ends of the day. If those figures send you hunting for another date, the 12-month verdict ranks the year, and July is the only month that runs hotter, at an average high of 104.5°F.

On this page

• Average highs, lows and rain days in August102.8°F by day, 0.32 inches of rain
• How hot the nights stayLows average 80.6°F
• Crowds, room rates and when to bookWhat we could verify, and what we could not
• Things to do in Las Vegas in AugustRed Rock Canyon, Lake Mead, Fremont Street
• A two-day plan built around the heatSunrise starts and after-dark evenings
• August vs July and SeptemberHow the three months compare, degree by degree
• Is August a good time to visit Las Vegas?Who should go, who should shift a month

Anything that is not dated by the month belongs elsewhere. Where to sleep, how the valley is laid out and whether a rental car is worth it do not change between February and August; the daytime average does, by a lot.

Las Vegas weather in August: average highs, lows and rain days

Every figure here comes from NOAA’s NCEI monthly normals for 1991-2020, station USW00023169: a real thermometer at Las Vegas McCarran Airport, not a modeled grid cell averaged over a square of desert. Where it sits matters. The gauge is on the valley floor, and both the open desert around the city and the Spring Mountains above it run cooler at night than 80.6°F suggests.

Measurable rain is close to a rounding error. The month’s normal is 0.32 inches, and the count of days reaching even a tenth of an inch is 0.7, which works out to roughly one damp afternoon every year and a half. In practical terms: no rain plan, no indoor backup booked in advance, no poncho in the bag. What ends an August afternoon outdoors in Las Vegas is the temperature.

The low of 80.6°F only arrives near dawn, which means a bag packed for August carries almost nothing warm for outdoors. The layer you do want is for indoors, where casino and restaurant air conditioning runs hard for hours at a time. The rest is sun gear: a hat, sunglasses, a refillable bottle, and shoes you can walk a mile of carpet in without thinking about it.

On August 15 the sun clears the horizon at 5:58 a.m. and sets at 7:31 p.m., for 13 hours 34 minutes of daylight, calculated by sunrise-sunset.org and converted to local time. The daily maximum is an afternoon event, so the comfortable outdoor hours sit at the front of that span and again after the light goes. Between them, August is an indoor city with pools attached.

How hot is Las Vegas in August, and how warm are the nights?

Two numbers define the month: 102.8°F by day, 80.6°F at night, a spread of 22.2°F. Both sit within two degrees of July, which averages 104.5°F and 82.0°F. Both sit around eight degrees above September, at 94.9°F and 72.4°F. Coming off the annual peak buys you 1.7°F of afternoon, and nobody’s skin registers 1.7°F.

At six in the morning that translates into shorts-and-shirt weather a runner would call warm. By three in the afternoon the same clothes become a sun-management problem, and the working rule outdoors is shade, water, and a car you can cool down before you get in it. Evenings do the opposite favor: dinner on a patio at nine o’clock is a reasonable plan in August and a chilly one in January.

Freezing nights are not an August question here, and the monthly normals we use do not publish a count of nights at or below 32°F for any month, so no such figure appears. The number that does the work is 80.6°F, itself the average of thirty Augusts of daily minimums, so warmer nights and cooler ones both hide inside it. Pool decks stay usable at ten at night because of it.

How busy is Las Vegas in August? Crowds, room rates and booking

Room rates first, with our cards on the table. We could not verify a monthly hotel-rate or occupancy series for Las Vegas in time, so nothing here ranks August against the other eleven months, cheapest or dearest. The verified facts we can put next to a budget are climate ones: 102.8°F by day, 80.6°F at night, 0.32 inches of rain, and a September that runs 7.9°F cooler in the afternoon.

Lead time is therefore a judgment call rather than a number. Hold the dates flexible, price a midweek stay against a weekend, fly midweek if the fare allows, and book refundable while you watch. If your trip can slide, put August nights and early-September nights side by side before you commit: the later dates carry the same 0.32 inches of rain and an average high of 94.9°F.

Resort fees and lodging tax are where a Las Vegas bill grows after the nightly rate, and we could not verify a current county tax percentage or a typical per-night resort fee, so we quote no amount. Ask for the all-in total at booking, parking included, rather than the headline rate on the search page.

The one upgrade that changes this month specifically is water. A property whose pool opens early and stays open after dark turns the two usable windows, before 8 a.m. and after 7:31 p.m., into actual hours of vacation; hours vary by property and by season, so ask before you pay for it. A higher floor and a better view cost the same in August as in February and do nothing about 102.8°F.

Things to do in Las Vegas in August: Red Rock Canyon, Lake Mead and Fremont Street

August hands the desert its mornings and the city its nights. Sunrise at 5:58 a.m. on the 15th means a trailhead start that is both early and genuinely usable, and the same long day keeps light on a patio until 7:31 p.m. No winter month here offers a six o’clock start with the sun already on the rock, and none offers a comfortable outdoor evening after nine.

The three names worth building days around sit in three directions. Red Rock Canyon lies west of the valley, close enough to drive out before sunrise and be back for breakfast. Lake Mead National Recreation Area sits east, shorelines and boat ramps rather than sidewalks. Fremont Street downtown is the covered, walkable alternative to the Strip after dark. Entry systems, gate hours and fees at the first two change by season, so check the operator the week you go.

What August changes at these places is the clock. The Red Rock loop that would be a relaxed midday outing in a 60-degree month becomes a pre-8 a.m. errand in a month averaging 102.8°F, and Lake Mead’s shorelines trade noon for evening. The Spring Mountains are the exception the normals point at: 102.8°F was measured on the valley floor, and the range above the city runs cooler than the gauge.

On free August programming, we found nothing verifiable to publish, so nothing is listed. What costs nothing on any night of the month is the walking: the sidewalks of the Strip and the covered blocks of Fremont Street after sunset at 7:31 p.m., when the outdoor hours reopen and 0.32 inches of monthly rain is unlikely to interfere.

Las Vegas in August: a two-day itinerary

Day one starts before the heat. Leave the hotel around 5:30 a.m., be at Red Rock Canyon for the 5:58 sunrise, walk until 8:30 and drive back while the temperature is still climbing toward its 102.8°F average. Breakfast indoors, pool from ten, and the hours from noon to five spent under a roof: a museum, a show, a long lunch. Out again at 7:31 p.m. for the Strip on foot, dinner at nine.

Day two goes east in the morning, to Lake Mead and the water, then downtown in the evening for Fremont Street. If the weather turns, it costs you an hour rather than a day: 0.7 days in an average August reach a tenth of an inch, and indoor Las Vegas is vast and air-conditioned. The contingency that matters more is heat. When the afternoon runs above average, drop the outdoor segment and keep the evening intact.

Las Vegas in August vs July and September

The afternoon numbers fall in an uneven staircase: 104.5°F in July, 102.8°F in August, 94.9°F in September. The first step is 1.7°F. Nobody feels that. The second is 7.9°F, and everybody does. Nights follow the same shape, 82.0 then 80.6 then 72.4. Rain never becomes a factor in any of the three, with September matching August exactly at 0.32 inches and July marginally wetter at 0.38 inches over 1.0 days.

Move your trip four weeks later and you buy back 7.9°F of afternoon and 8.2°F of night for the same rainfall. You give up daylight, since September days are shorter than 13 hours 34 minutes, and you give up the school-holiday convenience. Move four weeks earlier and you pay 1.7°F for nothing, as July is hotter by day, warmer at night and slightly wetter.

Is August a good time to visit Las Vegas?

Yes for anyone whose Las Vegas happens indoors with a pool attached, and for anyone willing to take the desert at 5:58 a.m. and give the afternoon away. No for hikers who want a full day at Red Rock, for families with small children walking between properties, and for anyone counting on covering the length of the Strip on foot at three in the afternoon at 102.8°F.

If the answer is no, September is the nearest repair: 94.9°F by day, 72.4°F at night, the same 0.32 inches of rain, and pools that still earn their deck chairs. Later months sit further down the curve again, and the 12-month ranking puts the whole year in order rather than two neighbors.

August’s particular offer is a 13-hour-34-minute day paired with a month that cannot realistically rain on it, at the point in summer where the afternoon has just come off July’s peak by 1.7°F.

The last word

Decide the shape of your day before you decide the hotel. An August that holds an outdoor hour at six in the morning and an evening starting at 7:31 p.m. works; one that contains a two o’clock walk does not, and no room upgrade fixes that. One figure not yet served: across the 1991-2020 record at that airport gauge, the normal number of August days delivering an inch of rain or more is 0.0. Pack for sun and for cold indoor air, book a pool you can reach after dark, and give the middle of the day to whatever has a roof.

Sources & data for this guide

• August normals: average high 102.8°F, average low 80.6°F, 0.32 in precipitation · NOAA NCEI monthly normals 1991-2020, station USW00023169, Las Vegas McCarran Airport · checked Sep 15, 2026
• Rain-day counts, 0.7 days at 0.10 in or more and 0.0 days at 1.00 in or more · same NOAA NCEI normals · checked Sep 15, 2026
• July and September normals used in the comparison · same NOAA NCEI normals, same 1991-2020 period · checked Sep 15, 2026
• Daylight of 13h 34m on August 15, sunrise 5:58 a.m. and sunset 7:31 p.m. local, converted from 12:58 and 02:31 UTC · sunrise-sunset.org · checked Sep 15, 2026
• The gauge sits on the valley floor; the surrounding desert and the Spring Mountains run cooler at night, and no separate station normal for them was read for this guide.
• No monthly hotel-rate, occupancy or lodging-tax figure for Las Vegas was verified, so none is quoted. Venue hours, entry fees and pool schedules change · check operators when you book.