30-year climate normals

Zapata County Climate and Weather Averages

Hottest month — August

99.1°

average daily high. The coldest month is January, averaging a low of 46.6°F.

Zapata County gets 20.4" of precipitation a year, and 43% of it falls in Jul, Aug, Sep.

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	68.2°	46.6°	0.81"
February	73.9°	51.4°	0.45"
March	81.1°	58.0°	0.66"
April	88.1°	64.4°	1.23"
May	93.4°	71.4°	2.64"
June	98.3°	75.7°	2.61"
July	98.2°	76.5°	2.83"
August	99.1°	76.7°	1.52"
September	92.7°	72.7°	4.37"
October	86.5°	65.0°	1.38"
November	76.2°	55.8°	1.23"
December	68.2°	47.9°	0.67"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 43% falling in the wettest three months (Jul, Aug, Sep).

January 0.81"

February 0.45"

March 0.66"

April 1.23"

May 2.64"

June 2.61"

July 2.83"

August 1.52"

September 4.37"

October 1.38"

November 1.23"

December 0.67"

Annual total 20.4"

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 4,281

Heating degree days How much heating the climate demands 823

Approximate annual cooling cost At 16.44¢/kWh, Texas average $704

Approximate annual electric heating cost Lower where heating is gas rather than electric $47

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 Zapata County, where electricity is one line of eight.

Common questions

What is the weather like in Zapata County?

Zapata County averages a high of 99.1°F in August and a low of 46.6°F in January. Annual precipitation is 20.4 inches, with essentially no snow.

When is the rainy season in Zapata County?

The wettest stretch is Jul, Aug, Sep, which accounts for 43% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Zapata County?

The average daily high in August, the hottest month, is 99.1°F. That drives 4,281 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Zapata County?

Effectively no. Measurable snowfall is rare in Zapata County.

Sources

Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station ZAPATA 1 S, TX US (USC00419976), 9.8 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, Texas residential average.
Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.