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
| 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).
Rain
| 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.
Sun
| 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.
Humidity
| 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 Time | 1 am | 4 am | 7 am | 10 am | 1 pm | 4 pm | 7 pm | 10 pm |
| Humidity % | 31 | 35 | 33 | 24 | 18 | 17 | 21 | 26 |
Wind
| 9.5 mph | August wind speed average | 15.3 kph |
August is a little windier than most other months in Las Vegas.
Storms
| 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.
Reference
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.