30-year climate normals

Horry County Climate and Weather Averages

Hottest month — July

90.8°

average daily high. The coldest month is January, averaging a low of 35.2°F.

Horry County gets 55.21" of precipitation a year, and 37% 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	58.1°	35.2°	4.28"
February	60.6°	38.1°	3.57"
March	68.0°	43.6°	3.76"
April	75.8°	51.9°	3.16"
May	82.6°	60.6°	3.33"
June	87.7°	68.7°	5.34"
July	90.8°	72.4°	6.89"
August	89.1°	71.2°	7.81"
September	84.8°	66.0°	6.00"
October	76.9°	54.8°	3.83"
November	68.2°	44.1°	3.21"
December	60.6°	38.6°	4.03"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 37% falling in the wettest three months (Jul, Aug, Sep).

January 4.28"

February 3.57"

March 3.76"

April 3.16"

May 3.33"

June 5.34"

July 6.89"

August 7.81"

September 6.00"

October 3.83"

November 3.21"

December 4.03"

Annual total 55.21"

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 2,141

Heating degree days How much heating the climate demands 2,287

Approximate annual cooling cost At 16.18¢/kWh, South Carolina average $346

Approximate annual electric heating cost Lower where heating is gas rather than electric $130

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 Horry County, where electricity is one line of eight.

Common questions

What is the weather like in Horry County?

Horry County averages a high of 90.8°F in July and a low of 35.2°F in January. Annual precipitation is 55.21 inches, with essentially no snow.

When is the rainy season in Horry County?

The wettest stretch is Jul, Aug, Sep, which accounts for 37% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Horry County?

The average daily high in July, the hottest month, is 90.8°F. That drives 2,141 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Horry County?

Effectively no. Measurable snowfall is rare in Horry County.

Sources

Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station CONWAY, SC US (USC00381997), 7 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, South Carolina residential average.
Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.