Editing Brentwood, Pennsylvania (section)

==Geography and climate==
Brentwood is located at {{coord|40|22|28|N|79|58|34|W|type:city}} (40.374469, -79.976179).<ref name="GR1">{{cite web|url=https://www.census.gov/geographies/reference-files/time-series/geo/gazetteer-files.html|publisher=[[United States Census Bureau]]|access-date=2011-04-23|date=2011-02-12|title=US Gazetteer files: 2010, 2000, and 1990}}</ref>
According to the [[United States Census Bureau]], the borough has a total area of {{convert|1.5|sqmi|km2}}, all  land.

The borough is in the [[Allegheny Plateau]] region of the United States, and is situated {{convert|5|mi|0}} south of the confluence of the [[Allegheny River]] and the [[Monongahela River]] to form the [[Ohio River]].

Due to its position between the [[Great Lakes]] and the [[windward]] side of the [[Allegheny Mountains]], Brentwood, along with the rest of the region, receives plentiful precipitation which supports lush vegetation. Also, because it is on the windward side of the mountains, it is often cloudy, having 203 cloudy days per year.<ref name="Cloud days">[http://lwf.ncdc.noaa.gov/oa/climate/online/ccd/cldy.html Cloudiness - Mean Number of Days] {{Webarchive|url=https://web.archive.org/web/20120531113038/http://lwf.ncdc.noaa.gov/oa/climate/online/ccd/cldy.html |date=2012-05-31 }}. Comparative Climate Data, ''[[National Climatic Data Center]]''. 2002. Last accessed January 11, 2007.</ref>  The winter is particularly cloudy, with only 28 percent sunshine in December and 23 cloudy days.<ref name="Cloud days"/><ref>[http://www.met.utah.edu/jhorel/html/wx/climate/sunshine.html Average Percent Possible Sunshine] {{webarchive|url=https://web.archive.org/web/20070220085430/http://www.met.utah.edu/jhorel/html/wx/climate/sunshine.html |date=2007-02-20 }}. Department of Meteorology, '[[University of Utah]]''. 1993. Last accessed January 11, 2007.</ref>  In the winter, when a northwest flow establishes itself over the Great Lakes, the wind blows from [[Lake Erie]] across eastern [[Ohio]] and western Pennsylvania. That wind carries moist air from the lake, producing clouds and heavy snow squalls.

===Surrounding communities===
Brentwood has three borders, including [[Baldwin, Pennsylvania|Baldwin]] to the east and northeast, [[Whitehall, Allegheny County, Pennsylvania|Whitehall]] to the south and west, and the Pittsburgh neighborhood of [[Carrick (Pittsburgh)|Carrick]] to the northwest.