30-year climate normals

Yuma County Climate and Weather Averages

Hottest month — July

109.2°

average daily high. The coldest month is December, averaging a low of 36.4°F.

Yuma County gets 3.79" of precipitation a year, and 37% 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	70.8°	37.4°	0.44"
February	74.6°	41.2°	0.56"
March	82.0°	46.7°	0.41"
April	88.8°	52.5°	0.09"
May	96.8°	60.5°	0.08"
June	105.8°	69.0°	0.02"
July	109.2°	78.4°	0.42"
August	108.7°	79.1°	0.43"
September	103.8°	71.5°	0.41"
October	92.1°	57.0°	0.23"
November	79.1°	44.0°	0.32"
December	68.9°	36.4°	0.38"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 37% falling in the wettest three months (Jan, Feb, Mar).

January 0.44"

February 0.56"

March 0.41"

April 0.09"

May 0.08"

June 0.02"

July 0.42"

August 0.43"

September 0.41"

October 0.23"

November 0.32"

December 0.38"

Annual total 3.79"

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 4,176

Heating degree days How much heating the climate demands 1,190

Approximate annual cooling cost At 15.23¢/kWh, Arizona average $636

Approximate annual electric heating cost Lower where heating is gas rather than electric $63

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 Yuma County, where electricity is one line of eight.

Common questions

What is the weather like in Yuma County?

Yuma County averages a high of 109.2°F in July and a low of 36.4°F in December. Annual precipitation is 3.79 inches, with essentially no snow.

When is the rainy season in Yuma County?

The wettest stretch is Jan, Feb, Mar, which accounts for 37% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Yuma County?

The average daily high in July, the hottest month, is 109.2°F. That drives 4,176 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Yuma County?

Effectively no. Measurable snowfall is rare in Yuma County.

Sources

Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station TACNA 3 NE, AZ US (USC00028396), 3.6 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, Arizona residential average.
Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.