The highest temperature measured during that time was 118 degrees Fahrenheit (48 degrees Celsius) on July 26, 1931.Since 1949, extreme temperatures have been observed at McCarran International Airport. The hot season lasts 3.4 months, from June 3 to September 16, with an average daily maximum temperature above 95°F. The hottest month of the year in Las Vegas is July, with an average high temperature of 104°F and a low of 80°F. I've been to Las Vegas several dozen times and every time I was there in summer the temperature exceeded 100 degrees.
The average high temperature in July is 102.4°F and Las Vegas has an average of 294 sunny days a year. The coldest month of the year in Las Vegas is December, with an average low of 39°F and a maximum of 58° F. The topography within 2 miles of Las Vegas contains only modest variations in elevation, with a maximum elevation change of 272 feet and an average elevation above sea level of 1,954 feet. Going back to 1937, in at least one year every day of the months of May, June, July, August and September has had at least one day of temperature of 100 degrees.
The highest temperature ever recorded in the state of Nevada is 125 degrees, which occurred on June 29, 1994 in Laughlin. The month with the most humid days in Las Vegas is February, with an average of 3.2 days with at least 0.04 inches of precipitation. Based on this score, the best time of year to visit Las Vegas for activities in warm climates is from early June to mid-September, with a maximum score in the last week of June. For the purposes of this report, the geographical coordinates of Las Vegas are 36,175 degrees of latitude, -115,137 degrees of longitude and 1,998 feet in elevation.
For each station, the records are corrected by the difference in elevation between that station and Las Vegas in accordance with the International Standard Atmosphere, and by the relative change present in the re-analysis of the MERRA-2 satellite era between the two locations. In Las Vegas, summers are sweltering, winters are cold, and it's dry and almost clear all year round. The area within 2 miles of Las Vegas is covered by artificial surfaces (53%) and shrubs (47%), within 10 miles by shrubs (59%) and artificial surfaces (32%), and within 50 miles by shrubs (91%). The windiest month of the year in Las Vegas is April, with an average hourly wind speed of 9.1 miles per hour.
The cloudiest month of the year in Las Vegas is February, during which, on average, the sky is overcast or cloudy 39% of the time. Las Vegas is located in the Mojave Desert, one of the hottest places on Earth and, without a doubt, the hottest place in the United States.