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United States › Delaware › Sussex County › Climate Station GEORGETOWN SUSSEX CO AP, DE US Distance 1.6 mi Normals 1991–2020

30-year climate normals

Sussex County Climate and Weather Averages

Hottest month — July

87.7°

average daily high. The coldest month is January, averaging a low of 28.6°F.

Sussex County gets 43.88" 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 45.2° 28.6° 3.01"
February 47.8° 30.0° 2.58"
March 55.2° 36.3° 3.86"
April 66.3° 45.3° 3.29"
May 74.5° 54.5° 3.63"
June 83.1° 64.0° 4.07"
July 87.7° 69.5° 4.14"
August 85.7° 67.7° 3.99"
September 79.5° 61.2° 4.54"
October 69.3° 49.4° 4.11"
November 58.7° 39.6° 3.19"
December 49.9° 32.7° 3.47"

Rainfall by month

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

January 3.01"
February 2.58"
March 3.86"
April 3.29"
May 3.63"
June 4.07"
July 4.14"
August 3.99"
September 4.54"
October 4.11"
November 3.19"
December 3.47"
Annual total 43.88"

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 1,396
Heating degree days How much heating the climate demands 4,070
Approximate annual cooling cost At 19.38¢/kWh, Delaware average $271
Approximate annual electric heating cost Lower where heating is gas rather than electric $276

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 Sussex County, where electricity is one line of eight.

Common questions

What is the weather like in Sussex County?

Sussex County averages a high of 87.7°F in July and a low of 28.6°F in January. Annual precipitation is 43.88 inches, with essentially no snow.

When is the rainy season in Sussex 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 Sussex County?

The average daily high in July, the hottest month, is 87.7°F. That drives 1,396 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Sussex County?

Effectively no. Measurable snowfall is rare in Sussex County.

Sources

  • Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station GEORGETOWN SUSSEX CO AP, DE US (USW00013764), 1.6 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, Delaware residential average.
  • Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.