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United States › New Jersey › Salem County › Climate Station WILMINGTON NEW CASTLE CO AP, DE US Distance 14.7 mi Normals 1991–2020

30-year climate normals

Salem County Climate and Weather Averages

Hottest month — July

86.8°

average daily high. The coldest month is January, averaging a low of 25.6°F.

Salem County gets 45.33" of precipitation a year and 20.2" of snow, and 29% of it falls in Jun, Jul, Aug.

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 41.4° 25.6° 3.23" 6.1"
February 44.1° 27.0° 2.83" 7.8"
March 52.5° 33.9° 4.16" 3.1"
April 64.2° 43.5° 3.51" 0.1"
May 73.5° 53.4° 3.57" 0.0"
June 82.2° 63.0° 4.67" 0.0"
July 86.8° 68.3° 4.41" 0.0"
August 84.9° 66.6° 3.98" 0.0"
September 78.5° 59.3° 4.38" 0.0"
October 67.0° 47.3° 3.68" 0.0"
November 55.9° 37.4° 3.06" 0.2"
December 46.0° 30.3° 3.85" 2.9"

Rainfall by month

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

January 3.23"
February 2.83"
March 4.16"
April 3.51"
May 3.57"
June 4.67"
July 4.41"
August 3.98"
September 4.38"
October 3.68"
November 3.06"
December 3.85"
Annual total 45.33"

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 1,229
Heating degree days How much heating the climate demands 4,647
Approximate annual cooling cost At 23.27¢/kWh, New Jersey average $286
Approximate annual electric heating cost Lower where heating is gas rather than electric $378

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 Salem County, where electricity is one line of eight.

Common questions

What is the weather like in Salem County?

Salem County averages a high of 86.8°F in July and a low of 25.6°F in January. Annual precipitation is 45.33 inches, including 20.2 inches of snow.

When is the rainy season in Salem County?

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

How hot does it get in Salem County?

The average daily high in July, the hottest month, is 86.8°F. That drives 1,229 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Salem County?

Yes. Salem County averages 20.2 inches of snow a year.

Sources

  • Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station WILMINGTON NEW CASTLE CO AP, DE US (USW00013781), 14.7 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, New Jersey residential average.
  • Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.