This weather has a price Keeping the median Harrison County home comfortable runs roughly $476 a year in heating and cooling alone. See where it lands in the monthly bill

30-year climate normals

Harrison County Climate and Weather Averages

Hottest month: August

90.7°

average daily high. The coldest month is January, averaging a low of 42.4°F.

Harrison County gets 62.82" of precipitation a year, and 33% 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	61.3°	42.4°	4.87"
February	64.8°	46.2°	4.44"
March	70.4°	51.8°	5.22"
April	76.5°	58.4°	5.51"
May	83.6°	66.4°	4.74"
June	88.7°	73.2°	6.89"
July	90.4°	74.9°	7.21"
August	90.7°	74.6°	6.53"
September	87.8°	70.6°	5.18"
October	79.9°	60.1°	3.71"
November	70.0°	49.2°	4.03"
December	63.5°	44.6°	4.49"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 33% falling in the wettest three months (Jun, Jul, Aug).

January 4.87"

February 4.44"

March 5.22"

April 5.51"

May 4.74"

June 6.89"

July 7.21"

August 6.53"

September 5.18"

October 3.71"

November 4.03"

December 4.49"

Annual total 62.82"

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 2,749

Heating degree days How much heating the climate demands 1,507

Approximate annual cooling cost At 14.54¢/kWh, Mississippi average $400

Approximate annual electric heating cost Lower where heating is gas rather than electric $77

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 Harrison County, where electricity is one line of eight.

Common questions

What is the weather like in Harrison County?

Harrison County averages a high of 90.7°F in August and a low of 42.4°F in January. Annual precipitation is 62.82 inches, with essentially no snow.

When is the rainy season in Harrison County?

The wettest stretch is Jun, Jul, Aug, which accounts for 33% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Harrison County?

The average daily high in August, the hottest month, is 90.7°F. That drives 2,749 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Harrison County?

The weather station used for Harrison County, GULFPORT - BILOXI AP, MS US, reports temperature and precipitation but not snowfall, so there is no snow normal to quote here. Precipitation that falls as snow is still counted in the 62.82 inches above, measured as melted water.

Sources

Temperature, precipitation and snowfall normals: NOAA National Centers for Environmental Information, 1991 to 2020 Monthly Climate Normals, station GULFPORT - BILOXI AP, MS US (USW00093874), 0.4 miles from the county centroid.
Heating and cooling degree days: NOAA, same station and period.
Annual figures on this page are the sum of that station's twelve monthly normals. NOAA also publishes a separately-computed annual normal, which can differ from the monthly sum by a few percent; we use the monthly series because the month-by-month breakdown above has to come from it.
Electricity price: US Energy Information Administration, Electric Power Monthly Table 5.6.A, Mississippi residential average.
Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.