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United States › South Carolina › Marlboro County › Climate Station MCCOLL 3 NNW, SC US Distance 9.6 mi Normals 1991–2020

30-year climate normals

Marlboro County Climate and Weather Averages

Hottest month — July

91.5°

average daily high. The coldest month is January, averaging a low of 34.3°F.

Marlboro County gets 41.72" of precipitation a year, and 30% 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.

40° 60° 80° JanFebMarAprMayJunJulAugSepOctNovDec
MonthAvg highAvg low Precip
January 55.3° 34.3° 3.37"
February 59.6° 36.8° 3.20"
March 67.2° 42.6° 3.03"
April 76.3° 51.0° 2.91"
May 82.9° 59.1° 3.01"
June 88.8° 67.4° 4.39"
July 91.5° 70.8° 4.15"
August 89.6° 69.4° 3.74"
September 84.1° 64.0° 4.71"
October 75.3° 52.5° 2.73"
November 65.5° 42.4° 3.24"
December 57.6° 36.5° 3.24"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 30% falling in the wettest three months (Jul, Aug, Sep).

January 3.37"
February 3.20"
March 3.03"
April 2.91"
May 3.01"
June 4.39"
July 4.15"
August 3.74"
September 4.71"
October 2.73"
November 3.24"
December 3.24"
Annual total 41.72"

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 2,023
Heating degree days How much heating the climate demands 2,594
Approximate annual cooling cost At 16.18¢/kWh, South Carolina average $327
Approximate annual electric heating cost Lower where heating is gas rather than electric $147

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 Marlboro County, where electricity is one line of eight.

Common questions

What is the weather like in Marlboro County?

Marlboro County averages a high of 91.5°F in July and a low of 34.3°F in January. Annual precipitation is 41.72 inches, with essentially no snow.

When is the rainy season in Marlboro County?

The wettest stretch is Jul, Aug, Sep, which accounts for 30% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Marlboro County?

The average daily high in July, the hottest month, is 91.5°F. That drives 2,023 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Marlboro County?

Effectively no. Measurable snowfall is rare in Marlboro County.

Sources

  • Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station MCCOLL 3 NNW, SC US (USC00385633), 9.6 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, South Carolina residential average.
  • Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.