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This state summary was produced to meet a demand for state-level information in the wake of the Third U.S. National Climate Assessment. The summary covers assessment topics directly related to NOAA’s mission, specifically historical climate variations and trends, future climate model projections of climate conditions during the 21st century, and past and future conditions of sea level and coastal flooding.

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A Fitting Finale: December 2018 Recap and Annual Summary, including the Top 10 Events of 2018

Dr. David A. Robinson
January 7, 2019

It is appropriate that the weather of last month of 2018 was rather similar to many earlier months in the year. Statewide, precipitation was above average for the 10th month of 2018 and the temperature was above average for the 8th month. This resulted in the year being the wettest on record and the 11th warmest since statewide observations began being calculated in 1895. More on this later in the report.

December precipitation totaled 5.38”. This is 1.53” above the 1981–2010 average and ranks as the 20th wettest (tied with 2007). Snowfall averaged 1.0”, which is 3.9” below average and the 31st least snowy December since 1895. The only notable snowfall was across a swath of south Jersey on the 5th, leading to a south Jersey monthly average of 1.7”. This is 1.9” below average and ranks as the 55th least snowy December. Northern counties averaged 0.6” for the month, some 6.0” below average and ranking 19th least snowy. Central counties came in without any measurable snowfall. This is 5.5” below average and joins ten other Decembers of the past 124 years without measurable snow, four of which have been this century (2001, 2006, 2011, and 2015).

The average statewide temperature was 37.5°. This is 2.3° above the 1981–2010 average and ranks as the 18th mildest December of the past 124 years (tied with 1972 and 1991).


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