30-year climate normals

Martin County Climate and Weather Averages

Hottest month — July

88.5°

average daily high. The coldest month is January, averaging a low of 33.1°F.

Martin County gets 53.2" of precipitation a year, and 35% 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	51.8°	33.1°	3.69"
February	54.9°	35.4°	3.22"
March	62.0°	41.7°	4.13"
April	71.4°	50.1°	3.72"
May	78.2°	58.8°	3.69"
June	85.3°	67.3°	5.13"
July	88.5°	71.4°	5.75"
August	86.9°	69.9°	5.70"
September	81.8°	64.3°	6.92"
October	73.0°	52.1°	4.29"
November	63.1°	42.2°	3.39"
December	55.3°	36.3°	3.57"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 35% falling in the wettest three months (Jul, Aug, Sep).

January 3.69"

February 3.22"

March 4.13"

April 3.72"

May 3.69"

June 5.13"

July 5.75"

August 5.70"

September 6.92"

October 4.29"

November 3.39"

December 3.57"

Annual total 53.2"

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 1,769

Heating degree days How much heating the climate demands 3,032

Approximate annual cooling cost At 15.09¢/kWh, North Carolina average $267

Approximate annual electric heating cost Lower where heating is gas rather than electric $160

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 Martin County, where electricity is one line of eight.

Common questions

What is the weather like in Martin County?

Martin County averages a high of 88.5°F in July and a low of 33.1°F in January. Annual precipitation is 53.2 inches, with essentially no snow.

When is the rainy season in Martin County?

The wettest stretch is Jul, Aug, Sep, which accounts for 35% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Martin County?

The average daily high in July, the hottest month, is 88.5°F. That drives 1,769 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Martin County?

Effectively no. Measurable snowfall is rare in Martin County.

Sources

Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station WILLIAMSTON 1 E, NC US (USC00319440), 5 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.