Your August weather guide
HotWeather in Las Vegas in August
August suits a Las Vegas trip if you tolerate intense heat and are happy to plan around it; it is a poor fit for long days outdoors. Average daytime highs reach 38°C, compared with 21°C in London, while nights average 26°C. The main advantage is dry, sunny weather. The catch is that evenings remain warm rather than offering a proper cool-down, so your daily routine matters more than packing for rain.
Long-term climate averages for Las Vegas, not a forecast · 1991-2020
Las Vegas, month by month
Your snapshot
At a glance
The useful details for Las Vegas.
- Average daytime high
- 37.9°C
- 9 in 10 days stay below 41°C
- Average night-time low
- 25.6°C
- coldest 10% of nights: 22°C or lower
- Compared with London
- +16.5°C
- London averages 21.4°C in August
- Sunshine per day (est.)
- 10.7h
- 80% of 13.4 h of daylight
- Rainy days (1 mm+)
- 2
- 9 mm over the month
- Humidity
- 23%
- Days over 25°C
- 100%
- 98% over 30°C
- Record high 1991-2020
- 45.2°C
- 2020-08-18
- Record low 1991-2020
- 16.4°C
- 2010-08-30
- Flight from London
- ≈ 11 h 18 min
- 8424 km, long-haul (estimate for a direct flight)
Records are observed extremes within 1991-2020, not typical holiday conditions. Warm-day percentages are shares of days, not day counts.
How August compares
August is the 2nd warmest month of the year in Las Vegas and ranks 4th of 134 destinations we compare for August - see where else is hot in August. Within United States it is 1st of 6 (United States in August). Against London's average high of 21.4°C in August, Las Vegas is 16.5°C warmer by day and 12.1°C warmer at night.
Daytime and night-time in August
The typical August day in Las Vegas peaks at 37.9°C, but that is an average: the warmest 10% of days reach 41.3°C or more. About 100% of days top 25°C and almost every pass 30°C. Nights average 25.6°C; one night in ten drops to 22.3°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest August day here reached 45.2°C (2020-08-18) and the coldest night 16.4°C (2010-08-30).
Rain in August
Dry (3 rainy days or fewer): about 2 days with 1 mm or more, 9 mm in total. Year to year it varies a lot - the wettest August was 2007 with 65 mm, the driest 2002 with 0 mm. Humidity averages 23%.
Sunshine and daylight
Around 10.7 hours of sunshine a day (estimated from cloud cover), 13.4 hours of daylight: the sun rises about 05:59 and sets about 19:31 local time in mid-August. Average cloud cover is 20%.
Is August a good time to visit Las Vegas?
It is a reasonable choice: hot days - though the heat can be intense at midday. The best months for Las Vegas on our scoring are May, October, April; months averaging 25°C or more: Apr, May, Jun, Jul, Aug, Sep, Oct.
Heat sets the pace
Treat the heat as the main constraint on your plans, not just a reason to pack summer clothes. The warmest days reach 41°C or more, so avoid committing to lengthy outdoor activities in the middle of the day. Put outdoor time towards the morning, keep drinking water and leave room for indoor breaks. Humidity averages 23%, which means the heat is dry, but that does not make strong sunshine or prolonged exposure harmless. Loose, lightweight clothing, a hat and sun protection are sensible essentials. If you dislike feeling hot after dark, August is unlikely to suit you: the average night-time low is still 26°C.
Plenty of sunshine, but plan time out of it
With about 10.7 hours of sunshine across 13.4 hours of daylight, August gives you plenty of light, but not necessarily comfortable conditions for using all of it outdoors. A flexible day works better than an uninterrupted outdoor schedule: head out earlier, pause during the strongest heat and resume later if you feel comfortable. Rain is a smaller concern than heat, though keeping an indoor option makes sense. For a UK traveller, the contrast with home is substantial rather than a modest step up in summer warmth. Choose August for a trip built around breaks from the heat, not for mild weather that lets you stay outside without much thought.
A little perspective
Las Vegas through the year
August is highlighted. See how it compares with the rest of the year.
| Month | Day | Night | Sun/day | Rain mm | Rainy days | Days 25°C+ |
|---|---|---|---|---|---|---|
| January | 13.8°C | 3.7°C | 5.8 | 22 | 4 | 0% |
| February | 16.1°C | 5.2°C | 6.2 | 29 | 5 | 1% |
| March | 20.6°C | 8.7°C | 7.3 | 16 | 3 | 21% |
| Aprilbest | 25.1°C | 12.2°C | 8.8 | 7 | 2 | 53% |
| Maybest | 30.3°C | 17.0°C | 10.0 | 5 | 1 | 85% |
| June | 36.1°C | 22.3°C | 12.1 | 2 | 0 | 98% |
| July | 38.9°C | 26.3°C | 11.0 | 7 | 2 | 100% |
| AugustSelected | 37.9°C | 25.6°C | 10.7 | 9 | 2 | 100% |
| September | 33.6°C | 21.2°C | 10.3 | 7 | 1 | 98% |
| Octoberbest | 26.2°C | 14.6°C | 8.6 | 8 | 2 | 64% |
| November | 18.5°C | 8.1°C | 7.1 | 10 | 2 | 9% |
| December | 12.9°C | 3.5°C | 5.8 | 20 | 3 | 0% |
Day = average daytime high, night = average night-time low, 1991-2020.Sun is hours per day; rainy days count 1 mm or more.
Day, night and sea
Monthly average temperatures, 1991-2020
- Day
- Night
Best months here
On warmth, low rainfall and sunshine, start with these.
Keep exploring
Similar in August
Closest matches on daytime temperature, sea temperature and sunshine, in other countries.
Egypt · 39°C by day · sea 29°C
Sharm El Sheikh
Morocco · 36°C by day
Marrakech
United Arab Emirates · 40°C by day · sea 34°C
Abu Dhabi
Spain · 35°C by day
Seville
Tunisia · 35°C by day · sea 27°C
Sousse
A little more detail
Las Vegas in August FAQs
Plain answers, grounded in the averages.
Is Las Vegas hot in August?
Las Vegas is hot in August: the average daytime high is 37.9°C and nights average 25.6°C. About 100% of August days reach 25°C or more.
How much does it rain in Las Vegas in August?
Las Vegas sees about 2 rainy days (1 mm or more) and 9 mm of rain in a typical August. The wettest August between 1991 and 2020 was 2007 (65 mm) and the driest was 2002 (0 mm).
How sunny is Las Vegas in August?
Las Vegas gets around 10.7 hours of sunshine a day in August out of 13.4 hours of daylight (estimated from average cloud cover).
How does Las Vegas compare with the UK in August?
Las Vegas is on average 16.5°C warmer than London by day in August (37.9°C against 21.4°C).
What is the hottest August on record in Las Vegas?
Between 1991 and 2020 the hottest August day in Las Vegas reached 45.2°C on 2020-08-18, and the coldest night dropped to 16.4°C on 2010-08-30.
Is rain likely to disrupt an August trip?
August is generally dry, with about 2 rainy days. Rain is therefore less likely than heat to dictate your plans, although dry monthly averages do not guarantee a rain-free stay. Keep some flexibility rather than assuming every day will stay dry.
Would another month be a better choice?
May, October and April are better overall weather choices. August is among the hottest months in Las Vegas, so it mainly suits travellers who tolerate strong heat. If comfortable outdoor time matters more than travelling in August, consider those alternatives.
How long is the flight from London?
The flight from London is about 11 hours 18 minutes, making this a long-haul trip. Consider that journey alongside the heat when deciding: leave your arrival plans flexible rather than committing straight away to a demanding outdoor schedule.
About these averages
ERA5-Land climate reanalysis via Open-Meteo (11 km grid), 1991-2020
Averages computed from daily values at Las Vegas. Sunshine hours are estimated from average cloud cover.Records are the highest and lowest daily values in that 30-year period, not all-time records. These are climate averages, not a forecast for your trip. How we measure holiday weather
- Hot · 25°C+
- Warm · 20°C to below 25°C
- Mild · 15°C to below 20°C
- Cool · below 15°C