Climate and Weather
The climate of New Jersey is most influenced by its location in the continental path of wind circulation from west to east known as the "prevailing westerlies." New Jersey's coastal location also influences its temperatures, as the ocean's higher heat capacity than that of land maintains warmer temperatures along the Jersey Shore than in inland areas as temperatures cool during the fall and the first weeks of winter. In the spring and summer, ocean breezes often cool the beaches and adjacent inland. New Jersey's coastal location also makes it a frequent site for hurricanes and other tropical storms which form in the eastern Atlantic, and for nor'easters and other storms which are generated by temperature differences from warmer waters of the Gulf Stream coming into contact with cooler temperatures and wind systems closer to the coast.
For the thirty years through 2010, New Jersey was the 22nd highest state in its average annual temperature of 52.7 degrees Fahrenheit; Florida was the warmest state at 70.7 degrees and Alaska the coldest at 26.6 degrees. Since statewide records commenced in 1895, the highest temperature recorded in the state was 110 degrees on July 10, 1936 in Old Bridge; the lowest was -34 degrees on January 5, 1904 in River Vale. February of 2015, with an average temperature during the month of 22 degrees, was the third coldest February and tied as sixth coldest of any month. Colder months were the Januaries of 1918 (19.9), 1977 (20.2), and 1912 (21.9), with January 1940 equal to the 22 degrees of February 2015. The coolest year since records began in 1895 through 2015 was 1904, when the average temperature for the state was 47.8 degrees.
The winter of 2014-2015 also was one of the snowiest on record; the 48 consecutive days with two inches or greater snow cover at New Brunswick was the 3rd longest on record since 1893 (maximum 53 in 2011). December of 2015 was the warmest December on record, with an average temperature throughout the state of 47.6 degrees--12 degrees above the normal average of 35.6 degrees for all Decembers from 1981 to 2010. For the entire 2015 year, the state's average temperature was 53.8 degrees, 2.4 degrees over the average of 51.4 degrees for the 20th century. The warmest year on record for the state since records began in 1895 was in 2012, when the average temperature was 55.9 degrees.
For the thirty years through 2000, average annual precipitation for the state was 47.1 inches. The southeast coast in Atlantic and Cape May counties ranges from about 40 inches while north-central counties typically receive about 51 inches in north-central parts of the state. From 1981 to 2010, average annual snowfall amounts in Newark were 28.6 inches; in New Brunswick 28.4 inches; and in Cape May 14.9 inches. The number of days on which snowfall was recorded ranged from 14.5 days in Newark and Elizabeth to 0.6 in Moorestown.
* National Centers for Environmental Information, National Oceanic and Atmospheric Administration
* National Climatic Data Center, National Oceanic and Atmospheric Administration
* Office of the New Jersey State Climatologist, Rutgers University
* New Jersey Climate Overview, Office of the New Jersey State Climatologist, Rutgers University
* New Jersey Weather & Climate Network
* Monthly Mean Temperatures in New Jersey 1895-2015, Office of the New Jersey State Climatologist, Rutgers University
* Monthly Precipitation in New Jersey 1895-2015, Office of the New Jersey State Climatologist, Rutgers University
* New Jersey Forecast, National Weather Service
* The Average Climate of New Jersey, USA TODAY
* New Jersey Climate Publications, Office of the New Jersey State Climatologist, Rutgers University
-- Climate change
New Jersey is viewed as particularly vulnerable to the impact of climate change influenced by global warming, a process caused by the emission of gases which absorb and emit radiation, thus trapping heat in the atmosphere. The primary greenhouse gases are water vapor, carbon dioxide, methane, nitrous oxide and ozone. The main sources of greenhouse gases due to human activity are burning of fossil fuels and deforestation leading to higher carbon dioxide concentrations in the air; agricultural activities, including the raising of livestock and the use of fertilizers that lead to, respectively, higher methane and nitrous oxide concentrations; and the use of chlorofluorocarbons in refrigeration, fire suppression and manufacturing processes. By mid-century, about 70% of summers in New Jersey will be warmer than the state’s warmest summer on record, according to one analysis.
Warmer temperatures are expected to result in rising sea levels and escalating inland tidal intrusions from melting of polar ice. In March 2016, a study was published on the impact of rising sea levels on the US coast projected that by the end of the century a six-foot sea level rise could force the relocation of over 837,000 New Jersey residents and a three-foot rise could result in forcing more than 300,000 from their residences. The most severe impacts, according to the report, would be on barrier islands in Ocean and Atlantic counties, but urban neighborhoods in low-lying areas of Hoboken and Newark also would be affected.
Over the fifty years from 1963 through 2012, the sea level at Atlantic City rose 9.5 inches, according to a report by the Union of Concerned Scientists, with changes in the path and strength of ocean currents in the Atlantic also contributing to faster-than-average sea level rise. Waters along New Jersey’s coast are rising faster than the global average, with estimates for sea-level rise projecting an increase of 10 inches by 2030 and by 1.5 feet by 2050. With 10 inches of sea-level rise by 2050, the chance of extreme flood losses occurring will nearly double, with resulting destruction of or damage to infrastructure like sewage plants, water supply systems, roads and utilities. Storms are also projected to be more frequent and of greater intensity, with storm surges flooding both coastal areas and major cities. Barrier islands such as Long Beach Island are seen to be prone to inundation for long periods threatening the survival of the existing communities on the island.
The temperature increases also will exacerbate health risks for the elderly, young children, minorities and lower-income groups, particularly those unable to afford housing with air conditioning. Other impacts will affect agriculture, with some crops and plants no longer viable, and tourism, as extreme heat reduces travel and visitor stays.
In 2007, the state enacted the "Global Warming Response Act," which committed New Jersey to reduce global warming gases to 1990 levels by 2020, and to reduce greenhouse gas emissions to 80% below 2006 levels by 2050. The legislation also directed the Department of Environmental Protection to develop a 1990 greenhouse gas emission inventory and a system for monitoring current greenhouse gas levels. Companion legislation also established a fund for a cap-and-trade program for the exchange of credits for carbon dioxide generation. The 2007 laws also implemented the Regional Greenhouse Gas Initiative, a compact eventually including ten northeast and Mid-Atlantic states, including New Jersey, to cap and reduce carbon dioxide emissions by utilities and other major power generators and sources through a cap-and-trade program. In 2011, however, the Christie Administration announced that New Jersey was withdrawing from the RGGI and also indicated its lack of support for other programs intended to meet the targets set by the 2007 legislation.
* Global Greenhouse Emissions Data, US Environmental Protection Agency
* Global Climate Change, State of New Jersey
* State of the Climate: New Jersey 2013, Rutgers Climate Institute
* How is New Jersey's Climate Changing and What Should We Expect, Office of the State Climatologist, Rutgers University
* Sea Level Rise & Global Warming, Union of Concerned Scientists
* An Unfamiliar State: Local Impacts of Global Warming in New Jersey, Environment New Jersey
* New Jersey Climate Adaptation Alliance, Rutgers University
* "Rising seas could drive 837K N.J. residents from their homes, study says," 3/14/2016, NJ.com