Las Vegas Weather Averages

A desert climate dominates the weather for Las Vegas, Nevada. There's plenty of sun year round and often a month goes by with no rain at all.

The temperature here can soar to over 100 degrees Fahrenheit (38 degrees Celsius) any time from May to September. But the rest of the year has pleasantly balmy conditions.

This page gives detailed information on the annual weather averages for temperature, precipitation, sun, humidity, wind and storms in 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

81 °F	annual average high	27 °C
60 °F	annual average low	15 °C

Las Vegas' coldest days of the year usually occur in the second half of December when the daily maximum temperature averages 56 degrees Fahrenheit (13 degrees Celsius) and the minimum averages 39 °F (4 °C).

The year's hottest days are normally in late July. The average temperature peaks then with daily highs of 105 °F (40 °C) and nighttime lows of 83 °F (28 °C).

137 days	90 °F max. or more (32 °C)
53 days	40 °F min. or less (4 °C)

Every day in Las Vegas has a maximum temperature of over 40 °F (4 °C). Las Vegas averages 78 days a year when the thermometer reaches into the 100s °F (over 37 °C). The 100-degree weather typically happens from May to September.

At night, the thermometer dips to 32 °F (0 °C) or below ten times a year. Las Vegas doesn't normally get as cold as 20 °F (-8 °C).

Precipitation

4.2 in	total precipitation	106 mm
26 days	of rain or snowfall

February is usually the wettest month of the year in Las Vegas, while May and June are the driest. Still, no month in this desert city averages more than an inch (25 mm) of precipitation.

Snow

0.3 in	total snowfall	0.8 cm
0.2 days	with new snow

Las Vegas gets a little snow about every five years, usually in December or February. Only once a decade on average does the snow covering the ground accummulate to over an inch (2.5 cm).

Sun

85 %	sunshine
210 days	clear skies

The sun's rays reach the ground in Las Vegas during 85 percent of daylight hours on average year round, for a total of 3782 hours annually. Typically on 210 days a year the sky is mainly clear, with at most 30 percent cloud cover.

Sunlight in Las Vegas lasts for 12 hours and 11 minutes a day on average. The shortest days of the year in mid December have 9 hours and 42 minutes of daylight. The year's longest days in mid June last 14:37 from sunrise to sunset.

Humidity

30 %	average humidity

The annual average for relative humidity in Las Vegas ranges throughout the day from 40 percent at 4:00 am to 20 percent at 4:00 pm.

Local Time	1 am	4 am	7 am	10 am	1 pm	4 pm	7 pm	10 pm
Humidity %	36	40	39	27	21	20	27	32

Wind

9.1 mph

wind speed average

14.6 kph

April is usually the windiest month for Las Vegas, while the wind is calmest during December and January.

Storms

2 days	precipitation of 0.5 inches (13 mm) or more
0 days	snowfall of 1 inch (2.5 cm) or more
13 days	with thunderstorms a year

Only twice a decade on average does Las Vegas have a storm that drenches the city in an inch (25 mm) or more of precipitation during a single day.

Snowstorms that produce over an inch of snow are not at all normal here.

Thunderstorms usually appear over Las Vegas from May to October. They are less common in spring and unusual in winter.