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United States › Virginia › Grayson County › Climate Station SPARTA 3.5 SSW, NC US Distance 13.8 mi Normals 1991–2020

30-year climate normals

Grayson County Climate and Weather Averages

Hottest month — July

83.6°

average daily high. The coldest month is January, averaging a low of 22.3°F.

Grayson County gets 57.09" of precipitation a year and 18.6" of snow, and 28% of it falls in Mar, Apr, May.

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 PrecipSnow
January 44.5° 22.3° 4.46" 5.3"
February 46.4° 24.4° 3.15" 4.2"
March 52.8° 31.3° 4.91" 3.1"
April 63.4° 39.8° 5.36" 1.0"
May 70.6° 49.2° 5.48" 0.0"
June 79.8° 57.1° 4.87" 0.0"
July 83.6° 61.7° 5.23" 0.0"
August 82.1° 59.6° 4.93" 0.0"
September 75.0° 52.7° 5.13" 0.0"
October 65.8° 41.2° 4.52" 0.0"
November 54.8° 31.9° 4.54" 0.3"
December 46.2° 25.8° 4.51" 4.7"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 28% falling in the wettest three months (Mar, Apr, May).

January 4.46"
February 3.15"
March 4.91"
April 5.36"
May 5.48"
June 4.87"
July 5.23"
August 4.93"
September 5.13"
October 4.52"
November 4.54"
December 4.51"
Annual total 57.09"

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 651
Heating degree days How much heating the climate demands 5,148
Approximate annual cooling cost At 17.61¢/kWh, Virginia average $115
Approximate annual electric heating cost Lower where heating is gas rather than electric $317

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 Grayson County, where electricity is one line of eight.

Common questions

What is the weather like in Grayson County?

Grayson County averages a high of 83.6°F in July and a low of 22.3°F in January. Annual precipitation is 57.09 inches, including 18.6 inches of snow.

When is the rainy season in Grayson County?

The wettest stretch is Mar, Apr, May, which accounts for 28% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Grayson County?

The average daily high in July, the hottest month, is 83.6°F. That drives 651 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Grayson County?

Yes. Grayson County averages 18.6 inches of snow a year.

Sources

  • Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station SPARTA 3.5 SSW, NC US (USC00318158), 13.8 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, Virginia residential average.
  • Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.