This December, Newark was much warmer than normal and much wetter than normal. The average temperature of 44.3°F was 6.3° above normal, and the 7.55 inches of precipitation was 182% of the normal amount (data are from SC-ACIS and normal is defined relative to the 1991-2020 NCEI climate normal).
This year stood out as the third warmest and the third wettest December in Newark in data going back to 1893. Decembers in Newark are getting hotter, leading to a change of 3.9°F since 1970. December is also the month with the second fastest rate of warming in Newark. The forecast for January from NOAA's Climate Prediction Center suggests that New Jersey is slightly favored to be warmer than normal. See https://www.cpc.ncep.noaa.gov for their temperature and precipitation predictions for January and beyond.