Editing Trenton, New Jersey (section)

==Climate==
According to the [[Köppen climate classification]], Trenton lies in the northern range of the [[humid subtropical]] (''Cfa'') zone, and  [[precipitation (meteorology)|precipitation]] fairly evenly distributed through the year. The ''Cfa'' climate is the result of [[Adiabatic process|adiabatic]] warming of the [[Appalachian Mountains|Appalachians]], low altitude and proximity to the coast without being on the immediate edge for moderate temperatures.<ref>{{Cite web |url=https://www.plantmaps.com/koppen-climate-classification-map-united-states.php |title=Interactive United States Koppen-Geiger Climate Classification Map |website=plantmaps.com |access-date=12 October 2018 |archive-date=October 11, 2018 |archive-url=https://web.archive.org/web/20181011214712/https://www.plantmaps.com/koppen-climate-classification-map-united-states.php |url-status=live}}</ref>

Summers are hot and humid, with a July daily average of {{convert|76.3|F|1}}; temperatures reaching or exceeding {{convert|90|F|0}} occur on 21.8 days.<ref name=NCEI/> Episodes of extreme heat and humidity can occur with [[heat index]] values reaching {{convert|100|F}}. Extremes in air temperature have ranged from {{convert|−14|F|0}} on February 9, 1934, up to {{convert|106|F|0}} as recently as July 22, 2011.<ref>Staff. [http://www.trentonian.com/article/TT/20110722/NEWS/307229969 "Heat sets new record high in Trenton at 106 degrees"] {{Webarchive |url=https://web.archive.org/web/20140223012030/http://www.trentonian.com/article/TT/20110722/NEWS/307229969 |date=February 23, 2014 }}, ''[[The Trentonian]]'', July 22, 2011. Accessed February 12, 2014. "The thermometer reached a record-setting 106 degrees here in the City of Trenton, easily smashing July 22nd's previous high mark from 1926, when the temp reached 101 degrees."</ref> However, air temperatures reaching {{convert|0|F|0}} or {{convert|100|F|0}} are uncommon.

Winters are cold and damp: the daily average temperature in January is {{convert|32.0|F|1}},<ref name= NCEI>{{cite web |url=https://www.ncei.noaa.gov/access/services/data/v1?dataset=normals-monthly-1991-2020&startDate=0001-01-01&endDate=9996-12-31&stations=USW00014792&format=pdf |title=Station: Trenton Mercer CO AP, NJ |work=U.S. Climate Normals 2020: U.S. Monthly Climate Normals (1991-2020) |publisher=National Oceanic and Atmospheric Administration |access-date=August 12, 2021 |archive-date=August 12, 2021 |archive-url=https://web.archive.org/web/20210812133503/https://www.ncei.noaa.gov/access/services/data/v1?dataset=normals-monthly-1991-2020&startDate=0001-01-01&endDate=9996-12-31&stations=USW00014792&format=pdf |url-status=live}}</ref> and temperatures at or below {{convert|10|F|0}} occur on 3.9 nights annually, while there are 17 days where the temperature fails to rise above freezing.<ref name=NOAA>{{cite web |url=https://w2.weather.gov/climate/xmacis.php?wfo=phi |title=NowData - NOAA Online Weather Data |publisher=National Oceanic and Atmospheric Administration |access-date=August 12, 2021 |archive-date=March 5, 2012 |archive-url=https://web.archive.org/web/20120305104542/https://w2.weather.gov/climate/xmacis.php?wfo=phi |url-status=live}}</ref> Episodes of extreme cold and wind can occur with [[wind chill]] values below {{convert|0|F}}, every few years. The [[plant hardiness zone]] at the Trenton Municipal Court is 7a with an average annual extreme minimum air temperature of {{convert|1.2|F|1}}.<ref name="USDA">[https://planthardiness.ars.usda.gov/PHZMWeb/InteractiveMap.aspx USDA Interactive Plant Hardiness Map] {{Webarchive |url=https://web.archive.org/web/20190704214427/https://planthardiness.ars.usda.gov/phzmweb/interactivemap.aspx |date=July 4, 2019 }}, [[United States Department of Agriculture]]. Accessed November 26, 2019.</ref>

The average precipitation is {{convert|45.47|in|cm|sigfig=3}} per year, which is fairly evenly distributed through the year.<ref name=NCEI/><ref name=NOAA/> The driest month on average is February, with {{convert|2.63|in|0|abbr=on}} of precipitation on average, while the wettest month is July with {{convert|4.39|in|cm|0|abbr=on}} of rainfall on average which corresponds with the annual peak in [[thunderstorm]] activity.<ref name=NCEI/><ref name=NOAA/> The all-time single-day rainfall record is {{convert|7.25|in|cm|1|abbr=on}} on September 16, 1999, during the passage of [[Hurricane Floyd]].<ref name=NOAA/> The all-time monthly rainfall record is {{convert|14.55|in|cm|1|abbr=on}} in August 1955, due to the passage of [[Hurricane Connie]] and [[Hurricane Diane]]. The wettest year on record was 1996, when {{convert|67.90|in|cm|0|abbr=on}} of precipitation fell. On the flip side, the driest month on record was October 1963, when only {{convert|0.05|in|cm|1|abbr=on}} of rain was recorded. The {{convert|28.79|in|cm|0|abbr=on}} of precipitation recorded in 1957 were the lowest ever for the city.<ref>[http://www.trentonnj.org/documents/fire%20department/city%20of%20trenton%20hazard%20mitigation%20plan_062808_f!!.pdf "City of Trenton, New Jersey Natural Hazard Mitigation Plan"] {{Webarchive |url=https://web.archive.org/web/20160112185616/http://www.trentonnj.org/documents/fire%20department/city%20of%20trenton%20hazard%20mitigation%20plan_062808_f!!.pdf |date=January 12, 2016 }}, City of Trenton. Accessed February 12, 2014.</ref>

Snowfall can vary even more year to year. The average seasonal (November–April) snowfall total is {{convert|24|to|30|in|cm}}, but has ranged from as low as {{convert|2|in|cm|1|abbr=on}} in the winter of 1918–1919 to as high as {{convert|76.5|in|cm|1|abbr=on}} in 1995–1996, which included the greatest single-storm snowfall, the [[North American blizzard of 1996|Blizzard of January 7–8, 1996]], when {{convert|24.2|in|cm|1}} of snow fell.<ref>[http://www.trentonnj.org/documents/fire%20department/city%20of%20trenton%20hazard%20mitigation%20plan_062808_f!!.pdf ''City of Trenton, New Jersey Natural Hazard Mitigation Plan''] {{Webarchive |url=https://web.archive.org/web/20160112185616/http://www.trentonnj.org/documents/fire%20department/city%20of%20trenton%20hazard%20mitigation%20plan_062808_f!!.pdf |date=January 12, 2016 }}, City of Trenton, adopted June 19, 2008. Accessed June 12, 2018. "The average snowfall is 24.9 inches, but has ranged from as low as 2 inches (in the winter of 1918–1919) to as high as 76.5 inches (in 1995–1996). The heaviest snowstorm on record was the Blizzard of 1996 on January 7–8, 1996, when 24.2 inches buried the city."</ref> The average snowiest month is February which corresponds with the annual peak in [[nor'easter]] activity.

{{Trenton, New Jersey weatherbox}}