Las Vegas Weather in July
July is the hottest month of the year for Las Vegas, Nevada. Most days the temperature rises well over 100 degrees Fahrenheit (38 degrees Celsius).
This page gives detailed information on the typical July 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
| 105 °F | July average high | 40 °C |
| 82 °F | July average low | 28 °C |
July is Las Vegas' hottest month, with overall temperatures peaking from the 17th to 31st. Those days have highs averaging 105 °F (40 °C) and lows of 83 °F (28 °C).
| 26 days | 100 °F max. or more (38 °C) |
| 1 day | 70 °F min. or less (21 °C) |
Usually every day in July heats up to over 90 °F (32 °C) at Las Vegas and most nights stay well above 70 °F (21 °C). July normally never gets weather any cooler than 60 °F (16 °C).
Rain
| 0.4 in | total precipitation | 10 mm |
| 3 days | of rain |
Half the time, Las Vegas receives 0.1 to 0.5 inches (2 to 13 mm) of rainfall in July. One in four years has drier weather, while another one in four is wetter.
Sun
| 88 % | sunshine |
| 20 days | clear skies |
The sun's rays reach the ground in Las Vegas during 88 percent of daylight hours on average in July, for a total of 391 hours in the month. Typically on 20 days this month the sky is mainly clear, with at most 30 percent cloud cover.
Sunlight in July at Las Vegas lasts for 14 hours and 19 minutes a day on average. The longest day of the month is the 1st with 14 hours and 35 minutes of daylight. By the end of the month, the days have shortened to 13:59 from sunrise to sunset. These durations can vary by a minute or two from year to year.
Humidity
| 21 % | July average humidity |
The relative humidity in Las Vegas during July usually peaks at 29 percent in the morning then drops to 15 percent around mid afternoon.
| Local Time | 1 am | 4 am | 7 am | 10 am | 1 pm | 4 pm | 7 pm | 10 pm |
| Humidity % | 25 | 29 | 26 | 19 | 16 | 15 | 17 | 22 |
Wind
| 9.9 mph | July wind speed average | 15.9 kph |
July 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 July |
About once a decade, Las Vegas receives over an inch (25 mm) of rain in one day during July.
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.