Editing Mercer County, New Jersey (section)

== Geography and climate ==
{{maplink|frame=yes|zoom=8|id=Q496886|type=shape|text=Interactive map of Mercer County, New Jersey}}
According to the [[United States Census Bureau|U.S. Census Bureau]], as of the 2020 Census, the county had a total area of {{convert|228.86|sqmi}}, of which {{convert|224.44|sqmi}} was land (98.1%) and {{convert|4.42|sqmi}} was water (1.9%).<ref name=CensusArea>[https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2020_Gazetteer/2020_gaz_counties_34.txt 2020 Census Gazetteer File for Counties in New Jersey], [[United States Census Bureau]]. Accessed April 1, 2023.</ref>

The county is generally flat and low-lying on the inner coastal plain, which extends up to the [[U.S. Route 1 in New Jersey|Route 1]] corridor. Further northwest, terrain rises as it ascends the [[Piedmont Plateau]], with [[The Sourlands]] encompassing the far northwestern portion of the county. [[Baldpate Mountain (Mercer County, New Jersey)|Baldpate Mountain]], in the western part of [[Hopewell Township, Mercer County, New Jersey|Hopewell Township]], is the highest point in the county, at {{convert|480|ft}} above sea level.<ref>[http://www.peakbagger.com/list.aspx?lid=13320 New Jersey County High Points] {{webarchive|url=https://web.archive.org/web/20150518173742/http://www.peakbagger.com/list.aspx?lid=13320 |date=May 18, 2015 }}, Peakbagger.com. Accessed October 5, 2013.</ref> The lowest elevation is sea level, spread out along the shores of the tidal portions of the [[Delaware River]], [[Crosswicks Creek]] and the smaller waterways within the Trenton-Hamilton Marsh in [[Hamilton Township, Mercer County, New Jersey|Hamilton Township]] and the city of [[Trenton, New Jersey|Trenton]].

=== Climate ===
Most of Mercer has a hot-summer [[humid continental climate]] (''Dfa'') except for the southern portion of the county near and including Trenton where a [[humid subtropical climate]] (''Cfa'') exists. The [[hardiness zone]]s are 6b and 7a.

{{Trenton, New Jersey weatherbox}}
{{Weather box	
| width = auto	
| single line = Y	
| location = Lawrence, Mercer County (40.2833, -74.7015), Elevation {{convert|62|ft|m|0|abbr=on}}, 1991–2020 normals, extremes 1981–2022	
| Jan record high F  =	71.6
| Feb record high F  =	77.6
| Mar record high F  =	88.2
| Apr record high F  =	95.4
| May record high F  =	95.6
| Jun record high F  =	98.3
| Jul record high F  =	102.9
| Aug record high F  =	100.8
| Sep record high F  =	97.6
| Oct record high F  =	93.8
| Nov record high F  =	80.8
| Dec record high F  =	75.4
| year record high F =	102.9
| Jan high F  =   	40.4
| Feb high F  =   	43.0
| Mar high F  =   	50.8
| Apr high F  =   	63.2
| May high F  =   	72.7
| Jun high F  =   	81.9
| Jul high F  =   	86.5
| Aug high F  =   	84.8
| Sep high F  =   	78.2
| Oct high F  =   	66.3
| Nov high F  =   	55.5
| Dec high F  =   	45.4
| year high F =   	64.2
| Jan low F  =   	23.7
| Feb low F  =   	25.2
| Mar low F  =   	32.1
| Apr low F  =   	42.0
| May low F  =   	51.6
| Jun low F  =   	60.7
| Jul low F  =   	66.1
| Aug low F  =   	64.3
| Sep low F  =   	57.3
| Oct low F  =   	45.6
| Nov low F  =   	35.8
| Dec low F  =   	28.9
| year low F =   	44.5
| Jan record low F  =	-9.9
| Feb record low F  =	-2.0
| Mar record low F  =	4.9
| Apr record low F  =	17.9
| May record low F  =	32.6
| Jun record low F  =	41.8
| Jul record low F  =	48.0
| Aug record low F  =	42.2
| Sep record low F  =	36.4
| Oct record low F  =	24.7
| Nov record low F  =	10.8
| Dec record low F  =	0.0
| year record low F =	-9.9
| precipitation colour = green	
| Jan precipitation inch  =   	3.56
| Feb precipitation inch  =   	2.76
| Mar precipitation inch  =   	4.26
| Apr precipitation inch  =   	3.68
| May precipitation inch  =   	4.04
| Jun precipitation inch  =   	4.48
| Jul precipitation inch  =   	4.94
| Aug precipitation inch  =   	4.44
| Sep precipitation inch  =   	4.18
| Oct precipitation inch  =   	4.12
| Nov precipitation inch  =   	3.32
| Dec precipitation inch  =   	4.37
| year precipitation inch =   	48.15
| Jan dew point F =	21.8
| Feb dew point F =	22.5
| Mar dew point F =	28.0
| Apr dew point F =	37.5
| May dew point F =	49.2
| Jun dew point F =	59.4
| Jul dew point F =	64.4
| Aug dew point F =	63.6
| Sep dew point F =	57.7
| Oct dew point F =	46.1
| Nov dew point F =	35.1
| Dec dew point F =	27.5
| year dew point F =	42.8
| source = PRISM<ref name=PRISM>{{cite web |url=http://prism.oregonstate.edu/explorer/|title=PRISM|access-date=June 24, 2023}}</ref>}}

===Ecology===
According to the [[A. W. Kuchler]] U.S. [[potential natural vegetation]] types, most of Mercer County would have a dominant vegetation type of Appalachian [[Oak]] (''104'') with a dominant vegetation form of Eastern [[Hardwood]] Forest (''25'') with a dominant section of Northeastern Oak/Pine (''110'') Southern Mixed Forest (''26'') in the far east near Hightstown.<ref name="Conservation Biology Institute">[https://databasin.org/datasets/1c7a301c8e6843f2b4fe63fdb3a9fe39 U.S. Potential Natural Vegetation, Original Kuchler Types, v2.0 (Spatially Adjusted to Correct Geometric Distortions)], Data Basin, Accessed June 24, 2023.</ref>