30-year climate normals

Clark County Climate and Weather Averages

Hottest month — July

103.8°

average daily high. The coldest month is December, averaging a low of 38.0°F.

Clark County gets 3.99" of precipitation a year, and 50% of it falls in Jan, Feb, Mar.

Temperature through the year

Each bar spans the average daily low to the average daily high for that month.

Month	Avg high	Avg low	Precip
January	58.0°	39.4°	0.67"
February	62.4°	42.7°	0.82"
March	70.5°	48.5°	0.51"
April	77.9°	55.0°	0.23"
May	87.8°	64.2°	0.08"
June	98.6°	73.7°	0.01"
July	103.8°	79.8°	0.13"
August	102.1°	77.5°	0.22"
September	94.2°	70.2°	0.24"
October	80.5°	57.5°	0.35"
November	66.8°	45.5°	0.29"
December	56.3°	38.0°	0.44"

Rainfall by month

Clark County has a distinct wet season. 50% of the year's precipitation arrives in Jan, Feb, Mar.

January 0.67"

February 0.82"

March 0.51"

April 0.23"

May 0.08"

June 0.01"

July 0.13"

August 0.22"

September 0.24"

October 0.35"

November 0.29"

December 0.44"

Annual total 3.99"

What this climate costs you

Degree days measure how hard a building has to work to stay comfortable. They are the reason two identical houses have very different power bills, and they are the link between the weather here and what you pay every month.

Cooling degree days How much air conditioning the climate demands 3,407

Heating degree days How much heating the climate demands 1,992

Approximate annual cooling cost At 13.6¢/kWh, Nevada average $463

Approximate annual electric heating cost Lower where heating is gas rather than electric $95

These are rough planning figures from degree days and the state electricity price, not a bill estimate. House size, insulation and fuel type move them a lot. See the full cost of owning a home in Clark County, where electricity is one line of eight.

Common questions

What is the weather like in Clark County?

Clark County averages a high of 103.8°F in July and a low of 38.0°F in December. Annual precipitation is 3.99 inches, with essentially no snow.

When is the rainy season in Clark County?

The wettest stretch is Jan, Feb, Mar, which accounts for 50% of the year's precipitation. That is a pronounced wet season rather than rain spread evenly through the year.

How hot does it get in Clark County?

The average daily high in July, the hottest month, is 103.8°F. That drives 3,407 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Clark County?

Effectively no. Measurable snowfall is rare in Clark County.

Sources

Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station LAS VEGAS AIR TERMINAL, NV US (USW00053123), 10.1 miles from the county centroid.
Heating and cooling degree days — NOAA, same station and period.
Electricity price — US Energy Information Administration, Electric Power Monthly Table 5.6.A, Nevada residential average.
Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.