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United States › Maryland › Frederick County › Climate Station FREDERICK POLICE BRKS, MD US Distance 4.3 mi Normals 1991–2020

30-year climate normals

Frederick County Climate and Weather Averages

Hottest month — July

88.6°

average daily high. The coldest month is January, averaging a low of 26.5°F.

Frederick County gets 43.52" of precipitation a year, and 29% 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 43.1° 26.5° 2.58"
February 47.8° 28.5° 2.95"
March 55.3° 35.6° 3.71"
April 68.6° 44.7° 3.55"
May 77.4° 55.0° 3.99"
June 85.2° 63.3° 4.26"
July 88.6° 68.4° 3.90"
August 86.7° 66.4° 2.89"
September 80.0° 59.3° 5.80"
October 68.8° 47.2° 3.26"
November 56.3° 37.8° 2.66"
December 47.1° 30.7° 3.97"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 29% falling in the wettest three months (Jul, Aug, Sep).

January 2.58"
February 2.95"
March 3.71"
April 3.55"
May 3.99"
June 4.26"
July 3.90"
August 2.89"
September 5.80"
October 3.26"
November 2.66"
December 3.97"
Annual total 43.52"

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 1,397
Heating degree days How much heating the climate demands 4,275
Approximate annual cooling cost At 21.77¢/kWh, Maryland average $304
Approximate annual electric heating cost Lower where heating is gas rather than electric $326

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 Frederick County, where electricity is one line of eight.

Common questions

What is the weather like in Frederick County?

Frederick County averages a high of 88.6°F in July and a low of 26.5°F in January. Annual precipitation is 43.52 inches, with essentially no snow.

When is the rainy season in Frederick County?

The wettest stretch is Jul, Aug, Sep, which accounts for 29% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Frederick County?

The average daily high in July, the hottest month, is 88.6°F. That drives 1,397 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Frederick County?

Effectively no. Measurable snowfall is rare in Frederick County.

Sources

  • Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station FREDERICK POLICE BRKS, MD US (USC00183348), 4.3 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, Maryland residential average.
  • Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.