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United States › New Jersey › Union County › Climate Station CRANFORD, NJ US Distance 0.9 mi Normals 1991–2020

30-year climate normals

Union County Climate and Weather Averages

Hottest month — July

85.9°

average daily high. The coldest month is January, averaging a low of 25.1°F.

Union County gets 50.39" of precipitation a year and 26.3" of snow, and 28% of it falls in May, Jun, Jul.

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 40.2° 25.1° 3.73" 7.0"
February 43.0° 26.8° 3.26" 8.2"
March 50.7° 33.2° 4.39" 5.0"
April 62.5° 42.7° 4.05" 0.3"
May 71.9° 52.5° 4.20" 0.0"
June 80.8° 62.4° 4.54" 0.0"
July 85.9° 67.6° 5.32" 0.0"
August 84.3° 66.1° 4.14" 0.0"
September 77.1° 59.2° 4.25" 0.0"
October 65.5° 46.7° 4.40" 0.0"
November 55.0° 37.5° 3.63" 0.1"
December 44.8° 30.5° 4.48" 5.7"

Rainfall by month

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

January 3.73"
February 3.26"
March 4.39"
April 4.05"
May 4.20"
June 4.54"
July 5.32"
August 4.14"
September 4.25"
October 4.40"
November 3.63"
December 4.48"
Annual total 50.39"

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 1,123
Heating degree days How much heating the climate demands 4,856
Approximate annual cooling cost At 23.27¢/kWh, New Jersey average $261
Approximate annual electric heating cost Lower where heating is gas rather than electric $395

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 Union County, where electricity is one line of eight.

Common questions

What is the weather like in Union County?

Union County averages a high of 85.9°F in July and a low of 25.1°F in January. Annual precipitation is 50.39 inches, including 26.3 inches of snow.

When is the rainy season in Union County?

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

How hot does it get in Union County?

The average daily high in July, the hottest month, is 85.9°F. That drives 1,123 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Union County?

Yes. Union County averages 26.3 inches of snow a year.

Sources

  • Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station CRANFORD, NJ US (USC00282023), 0.9 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.