Average Weather in July in Las Vegas Nevada, United States
In Las Vegas, the month of July is characterized by essentially constant daily high temperatures, with daily highs around 104°F throughout the month, rarely exceeding 111°F or dropping below 97°F. The highest daily average high temperature is 105°F on July 15.
Daily low temperatures increase by 2°F, from 78°F to 80°F, rarely falling below 71°F or exceeding 87°F. The highest daily average low temperature is 80°F on July 22.
For reference, on July 13, the hottest day of the year, temperatures in Las Vegas typically range from 80°F to 105°F, while on December 26, the coldest day of the year, they range from 38°F to 56°F.
Average High and Low Temperature in July
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on July. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.
Average Hourly Temperature in July
The month of July in Las Vegas experiences gradually increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 14% to 19%.
The clearest day of the month is July 1, with clear, mostly clear, or partly cloudy conditions 86% of the time.
For reference, on February 23, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 39%, while on June 21, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 88%.
Cloud Cover in July
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Las Vegas, the chance of a wet day over the course of July is rapidly increasing, starting the month at 3% and ending it at 9%.
For reference, the year's highest daily chance of a wet day is 13% on February 22, and its lowest chance is 1% on June 16.
Probability of Precipitation in July
To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.
The average sliding 31-day rainfall during July in Las Vegas is gradually increasing, starting the month at 0.2 inches, when it rarely exceeds 0.5 inches, and ending the month at 0.5 inches, when it rarely exceeds 1.1 inches.
Average Monthly Rainfall in July
Over the course of July in Las Vegas, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 35 minutes, implying an average daily decrease of 1 minute, 11 seconds, and weekly decrease of 8 minutes, 14 seconds.
The shortest day of the month is July 31, with 13 hours, 59 minutes of daylight and the longest day is July 1, with 14 hours, 35 minutes of daylight.
Hours of Daylight and Twilight in July
The earliest sunrise of the month in Las Vegas is 5:27 AM on July 1 and the latest sunrise is 20 minutes later at 5:47 AM on July 31.
The latest sunset is 8:01 PM on July 1 and the earliest sunset is 15 minutes earlier at 7:46 PM on July 31.
Daylight saving time is observed in Las Vegas during 2017, but it neither starts nor ends during July, so the entire month is in daylight saving time.
For reference, on June 21, the longest day of the year, the Sun rises at 5:23 AM and sets 14 hours, 37 minutes later, at 8:01 PM, while on December 21, the shortest day of the year, it rises at 6:47 AM and sets 9 hours, 42 minutes later, at 4:29 PM.
Sunrise & Sunset with Twilight in July
We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.
The chance that a given day will be muggy in Las Vegas is gradually increasing during July, rising from 1% to 3% over the course of the month.
For reference, on August 6, the muggiest day of the year, there are muggy conditions 4% of the time, while on January 1, the leasy muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in July
This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.
The average hourly wind speed in Las Vegas is gradually decreasing during July, decreasing from 4.6 miles per hour to 4.0 miles per hour over the course of the month.
For reference, on April 26, the windiest day of the year, the daily average wind speed is 5.0 miles per hour, while on August 28, the calmest day of the year, the daily average wind speed is 3.8 miles per hour.
Average Wind Speed in July
Wind Direction in July
This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.
The average daily incident shortwave solar energy in Las Vegas is gradually decreasing during July, falling by 0.9 kWh, from 8.5 kWh to 7.6 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in July