Las Vegas Weather in August

Las Vegas, Nevada endures more intense heat in August. This is the second month in a row of mainly 100-degree Fahrenheit temperatures (over 37 degrees Celsius).

This page gives detailed information on the typical August temperature, precipitation, sun, humidity, wind and storms for Las Vegas. The numbers here are historical averages based on climate data gathered at the McCarran International Airport, located near the south end of the Las Vegas Strip.

Temperature Weather iconTemperature

103 °F August average high 39 °C
  81 °F August average low 27 °C
25 days 100 °F max. or more (38 °C)
1 day 70 °F min. or less (21 °C)

Nearly every day in August heats up to over 90 °F (32 °C) in Las Vegas. August normally does not get any cooler than 60 °F (16 °C).

Rainy Weather iconRain

0.3 in total precipitation 8 mm
2 days of rain

Most years, Las Vegas gets less than 0.4 inches (9 mm) of rain in August. About once every four years, the city receives no rain at all this month.

Sunny Weather iconSun

88 % sunshine
22 days clear skies

The sun's rays reach the ground in Las Vegas during 88 percent of daylight hours on average in August, for a total of 368 hours in the month. Typically on 22 days this month the sky is mainly clear, with at most 30 percent cloud cover.

Sunlight in August at Las Vegas lasts for 13 hours and 28 minutes a day on average. The longest day of the month is the 1st with 13 hours and 58 minutes of daylight. By the end of the month, the days have shortened by an hour to 12:58 from sunrise to sunset. These durations can vary by a minute or two from year to year.

Humid Weather iconHumidity

26 % August average humidity

The relative humidity in Las Vegas during August usually peaks at 35 percent in the morning then drops to 17 percent around mid afternoon.

Local Time1 am4 am7 am10 am1 pm4 pm7 pm10 pm
Humidity % 31 35 33 24 18 17 21 26

Windy Weather iconWind

9.5 mph August wind speed average 15.3 kph

August is a little windier than most other months in Las Vegas.

Stormy Weather iconStorms

1 day rainfall of 0.1 inches (2.5 mm) or more
4 days with thunderstorms in August

Las Vegas usually sees more thunderstorm activity in August than any other month.


The weather data here are long-term averages provided by the US National Centers for Environmental Information (NCEI). Temperature and precipitation are 1991-2020 normals while humidity and thunderstorms are 1961-1990 normals.

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