<noinclude>((pp-semi-indef|small=yes))</noinclude>((Weather box
|name = Philadelphia weatherbox
|location = Philadelphia ([[Philadelphia International Airport|Philadelphia Airport]]), 1991–2020 normals,((efn|Mean monthly maxima and minima (i.e. the highest and lowest temperature readings during an entire month or year) calculated based on data at said location from 1991 to 2020.)) extremes 1872–present((efn|Official temperature and precipitation measurements for Philadelphia were taken at the Weather Bureau Office in downtown from January 1872 to 19 June 1940, and at Philadelphia Int'l from 20 June 1940 to the present.<ref>[http://threadex.rcc-acis.org/ ThreadEx]; search for location= "PA - Philadelphia", variable= "Station thread"</ref>  Snowfall and snow depth records date to 1 January 1884 and 1 October 1948, respectively.<ref name="PhillyNOAA"/> In 2006, snowfall measurements were moved to [[National Park, New Jersey]] directly across the Delaware River from the airport.<ref>((cite web|last1=Wood|first1=Anthony R.|title=Snow total at airport gets a boost A new measuring station and technique likely contributed to two 8-inch-plus readings|url=http://articles.philly.com/2009-03-20/news/25278745_1_measure-snow-weather-station-airport-measurements|website=Philly.com|publisher=The Inquirer|access-date=2014-06-10|archive-url=https://web.archive.org/web/20140728111656/http://articles.philly.com/2009-03-20/news/25278745_1_measure-snow-weather-station-airport-measurements|archive-date=2014-07-28|url-status=dead))</ref> ))
|collapsed = Y
|single line = Y
|Jan record high F = 74
|Feb record high F = 79
|Mar record high F = 87
|Apr record high F = 95
|May record high F = 97
|Jun record high F = 102
|Jul record high F = 104
|Aug record high F = 106
|Sep record high F = 102
|Oct record high F = 96
|Nov record high F = 84
|Dec record high F = 73
|year record high F = 106
|Jan avg record high F = 63.3
|Feb avg record high F = 63.5
|Mar avg record high F = 73.8
|Apr avg record high F = 84.3
|May avg record high F = 90.2
|Jun avg record high F = 94.8
|Jul avg record high F = 97.1
|Aug avg record high F = 94.8
|Sep avg record high F = 90.6
|Oct avg record high F = 82.6
|Nov avg record high F = 72.4
|Dec avg record high F = 64.2
|year avg record high F = 98.1
|Jan high F = 41.3
|Feb high F = 44.3
|Mar high F = 52.8
|Apr high F = 64.7
|May high F = 74.4
|Jun high F = 83.2
|Jul high F = 87.8
|Aug high F = 85.8
|Sep high F = 78.9
|Oct high F = 67.2
|Nov high F = 55.9
|Dec high F = 46.0
|year high F = 65.2
|Jan mean F = 33.7
|Feb mean F = 35.9
|Mar mean F = 43.6
|Apr mean F = 54.5
|May mean F = 64.3
|Jun mean F = 73.5
|Jul mean F = 78.7
|Aug mean F = 76.8
|Sep mean F = 69.9
|Oct mean F = 58.2
|Nov mean F = 47.4
|Dec mean F = 38.6
|year mean F = 56.3
|Jan low F = 26.0
|Feb low F = 27.5
|Mar low F = 34.3
|Apr low F = 44.3
|May low F = 54.2
|Jun low F = 63.9
|Jul low F = 69.6
|Aug low F = 67.9
|Sep low F = 60.9
|Oct low F = 49.2
|Nov low F = 38.8
|Dec low F = 31.2
|year low F = 47.3
|Jan avg record low F = 10.7
|Feb avg record low F = 13.7
|Mar avg record low F = 20.8
|Apr avg record low F = 33.0
|May avg record low F = 43.1
|Jun avg record low F = 53.2
|Jul avg record low F = 62.2
|Aug avg record low F = 60.3
|Sep avg record low F = 49.5
|Oct avg record low F = 37.1
|Nov avg record low F = 26.4
|Dec avg record low F = 19.0
|year avg record low F = 8.6
|Jan record low F = −7
|Feb record low F = −11
|Mar record low F = 5
|Apr record low F = 14
|May record low F = 28
|Jun record low F = 44
|Jul record low F = 51
|Aug record low F = 44
|Sep record low F = 35
|Oct record low F = 25
|Nov record low F = 8
|Dec record low F = −5
|year record low F = -11
|precipitation colour = green
|Jan precipitation inch = 3.13
|Feb precipitation inch = 2.75
|Mar precipitation inch = 3.96
|Apr precipitation inch = 3.47
|May precipitation inch = 3.34
|Jun precipitation inch = 4.04
|Jul precipitation inch = 4.38
|Aug precipitation inch = 4.29
|Sep precipitation inch = 4.40
|Oct precipitation inch = 3.47
|Nov precipitation inch = 2.91
|Dec precipitation inch = 3.97
|year precipitation inch = 44.11
|Jan snow inch = 7.1
|Feb snow inch = 8.4
|Mar snow inch = 3.6
|Apr snow inch = 0.3
|May snow inch = 0.0
|Jun snow inch = 0.0
|Jul snow inch = 0.0
|Aug snow inch = 0.0
|Sep snow inch = 0.0
|Oct snow inch = 0.0
|Nov snow inch = 0.2
|Dec snow inch = 3.5
|year snow inch = 23.1
|unit precipitation days = 0.01 in
|Jan precipitation days = 11.0
|Feb precipitation days = 9.7
|Mar precipitation days = 10.9
|Apr precipitation days = 10.9
|May precipitation days = 11.0
|Jun precipitation days = 10.3
|Jul precipitation days = 10.1
|Aug precipitation days = 8.9
|Sep precipitation days = 9.3
|Oct precipitation days = 9.1
|Nov precipitation days = 8.6
|Dec precipitation days = 11.0
|year precipitation days = 120.8
|unit snow days = 0.1 in
|Jan snow days = 4.1
|Feb snow days = 3.8
|Mar snow days = 2.0
|Apr snow days = 0.2
|May snow days = 0.0
|Jun snow days = 0.0
|Jul snow days = 0.0
|Aug snow days = 0.0
|Sep snow days = 0.0
|Oct snow days = 0.0
|Nov snow days = 0.1
|Dec snow days = 1.8
|year snow days = 12.0
|Jan humidity = 66.2
|Feb humidity = 63.6
|Mar humidity = 61.7
|Apr humidity = 60.4
|May humidity = 65.4
|Jun humidity = 67.8
|Jul humidity = 69.6
|Aug humidity = 70.4
|Sep humidity = 71.6
|Oct humidity = 70.8
|Nov humidity = 68.4
|Dec humidity = 67.7
|year humidity = 67.0
|Jan sun = 155.7
|Feb sun = 154.7
|Mar sun = 202.8
|Apr sun = 217.0
|May sun = 245.1
|Jun sun = 271.2
|Jul sun = 275.6
|Aug sun = 260.1
|Sep sun = 219.3
|Oct sun = 204.5
|Nov sun = 154.7
|Dec sun = 137.7
|Jan percentsun = 52 
|Feb percentsun = 52
|Mar percentsun = 55 
|Apr percentsun = 55
|May percentsun = 55
|Jun percentsun = 61
|Jul percentsun = 61
|Aug percentsun = 61
|Sep percentsun = 59 
|Oct percentsun = 59
|Nov percentsun = 52
|Dec percentsun = 47
|year percentsun = 56
|Jan dew point C = −6.8
|Feb dew point C = −6.1
|Mar dew point C = −1.9
|Apr dew point C = 2.8
|May dew point C = 9.7
|Jun dew point C = 15.1
|Jul dew point C = 18.1
|Aug dew point C = 17.6
|Sep dew point C = 14.0
|Oct dew point C = 7.6
|Nov dew point C = 2.0
|Dec dew point C = −3.6
|Jan uv = 2
|Feb uv = 3
|Mar uv = 4
|Apr uv = 6
|May uv = 8
|Jun uv = 9
|Jul uv = 9
|Aug uv = 8
|Sep uv = 6
|Oct uv = 4
|Nov uv = 2
|Dec uv = 2
|source 1 = [[NOAA]] (relative humidity, dew point and sun 1961–1990)<ref name="NOAA-txt-Phily1991">((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=USW00013739&format=pdf |publisher=[[National Oceanic and Atmospheric Administration]] |title=Summary of Monthly Normals 1991–2020 |access-date=June 13, 2021))</ref><ref name=noaasun-Phily1961>((cite web |url = ftp://ftp.atdd.noaa.gov/pub/GCOS/WMO-Normals/TABLES/REG_IV/US/GROUP3/72408.TXT |title = WMO Climate Normals for PHILADELPHIA/INT'L ARPT PA 1961–1990 |access-date = July 18, 2020 |publisher = National Oceanic and Atmospheric Administration))</ref><ref name="PhillyNOAA">((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 = April 13, 2016))</ref>
|source 2 = Weather Atlas (UV index)<ref name="Weather Atlas - Philadelphia">((cite web |url=https://www.weather-us.com/en/pennsylvania-usa/philadelphia-climate |title=Philadelphia, Pennsylvania, USA - Monthly weather forecast and Climate data |publisher=Weather Atlas |access-date=May 17, 2019))</ref>
))

{|style="width:100%;text-align:center;line-height:1.2em;margin-left:auto;margin-right:auto" class="wikitable mw-collapsible mw-collapsed"
|-
!Colspan=14|Climate data for Philadelphia
|-
!Month
!Jan
!Feb
!Mar
!Apr
!May
!Jun
!Jul
!Aug
!Sep
!Oct
!Nov
!Dec
!style="border-left-width:medium"|Year
|-
!Average sea temperature °F (°C)
|style="background:#5252FF;color:#FFFFFF;"|41.8<br />(5.5)
|style="background:#4242FF;color:#FFFFFF;"|39.9<br />(4.4)
|style="background:#4C4CFF;color:#FFFFFF;"|41.2<br />(5.1)
|style="background:#7A7AFF;color:#000000;"|46.7<br />(8.2)
|style="background:#B7B7FF;color:#000000;"|53.9<br />(12.2)
|style="background:#FFD755;color:#000000;"|66.3<br />(19.0)
|style="background:#FF8300;color:#000000;"|74.0<br />(23.3)
|style="background:#FF6D00;color:#000000;"|75.9<br />(24.4)
|style="background:#FF9E00;color:#000000;"|71.4<br />(21.9)
|style="background:#FFEDB2;color:#000000;"|64.2<br />(17.9)
|style="background:#C0C0FF;color:#000000;"|55.1<br />(12.8)
|style="background:#8484FF;color:#000000;"|47.7<br />(8.8)
|style="background:#CCCCFF;color:#000000;border-left-width:medium"|56.5<br />(13.6)
|-
!Mean daily daylight hours
|style="background:#F0F011;color:#000000;"|10.0
|style="background:#F7F722;color:#000000;"|11.0
|style="background:#FFFF33;color:#000000;"|12.0
|style="background:#FFFF44;color:#000000;"|13.0
|style="background:#FFFF55;color:#000000;"|14.0
|style="background:#FFFF66;color:#000000;"|15.0
|style="background:#FFFF66;color:#000000;"|15.0
|style="background:#FFFF55;color:#000000;"|14.0
|style="background:#FFFF33;color:#000000;"|12.0
|style="background:#F7F722;color:#000000;"|11.0
|style="background:#F0F011;color:#000000;"|10.0
|style="background:#E9E900;color:#000000;"|9.0
|style="background:#FFFF35;color:#000000;border-left-width:medium"|12.2
|-
!Colspan=14 style="background:#f8f9fa;font-weight:normal;font-size:95%;"|Source: Weather Atlas <ref name="Weather Atlas - Philadelphia" />
|}<noinclude>

==Notes==
((notelist))
==References==
((reflist))
[[Category:United States weatherbox templates]]
[[Category:Templates that generate named references]]</noinclude>