30-year climate normals

Harnett County Climate and Weather Averages

Hottest month — July

90.3°

average daily high. The coldest month is January, averaging a low of 29.3°F.

Harnett County gets 46.64" of precipitation a year, and 34% of it falls in Jun, Jul, Aug.

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	52.6°	29.3°	3.11"
February	55.3°	31.2°	2.77"
March	64.0°	38.4°	3.24"
April	73.3°	46.0°	3.65"
May	80.2°	56.6°	3.99"
June	86.8°	64.5°	4.73"
July	90.3°	69.4°	6.59"
August	88.3°	67.9°	4.41"
September	83.2°	61.7°	4.63"
October	74.0°	48.8°	3.21"
November	63.5°	37.0°	2.85"
December	55.0°	32.0°	3.46"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 34% falling in the wettest three months (Jun, Jul, Aug).

January 3.11"

February 2.77"

March 3.24"

April 3.65"

May 3.99"

June 4.73"

July 6.59"

August 4.41"

September 4.63"

October 3.21"

November 2.85"

December 3.46"

Annual total 46.64"

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 1,676

Heating degree days How much heating the climate demands 3,324

Approximate annual cooling cost At 15.09¢/kWh, North Carolina average $253

Approximate annual electric heating cost Lower where heating is gas rather than electric $176

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 Harnett County, where electricity is one line of eight.

Common questions

What is the weather like in Harnett County?

Harnett County averages a high of 90.3°F in July and a low of 29.3°F in January. Annual precipitation is 46.64 inches, with essentially no snow.

When is the rainy season in Harnett County?

The wettest stretch is Jun, Jul, Aug, which accounts for 34% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Harnett County?

The average daily high in July, the hottest month, is 90.3°F. That drives 1,676 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Harnett County?

Effectively no. Measurable snowfall is rare in Harnett County.

Sources

Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station LILLINGTON, NC US (USC00314987), 3.9 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, North Carolina residential average.
Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.