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Do not fill this in! ===Climate=== {{climate chart |Nashville, Tennessee |30|49|4.0 |33|54|4.5 |40|63|4.5 |49|73|4.7 |58|80|5.0 |66|88|4.4 |71|91|4.2 |69|90|3.8 |62|84|3.8 |50|74|3.4 |39|61|3.9 |33|52|4.4 |units = imperial |float = right |clear = both}} Nashville International Airport in Donelson has a [[humid subtropical climate]] ([[Köppen climate classification|Köppen]] ''Cfa'', [[Trewartha climate classification|Trewartha]] ''Cf''),<ref name="Petersen2016">{{cite book |url=https://books.google.com/books?id=ZsmrCwAAQBAJ&pg=PT228 |title=Physical Geography |publisher=Cengage Learning |first1=James F. |last1=Petersen |first2=Dorothy I. |last2=Sack |first3=Robert E. |last3=Gabler |edition=11th |page=205 |date=2016 |isbn=978-1-305-65264-4}}</ref> with hot, humid summers and generally cool winters typical of the [[Upper South]].<ref name="nash.brit.clim">{{cite encyclopedia |url=https://www.britannica.com/science/humid-subtropical-climate |title=Humid subtropical climate |encyclopedia=Encyclopædia Britannica Online |date=March 14, 2016 |access-date=December 26, 2016}}</ref><ref name="Pidwirny2006">{{cite book |section-url=http://www.physicalgeography.net/fundamentals/7v.html |section=Climate Classification and Climatic Regions of the World |title=Fundamentals of Physical Geography |edition=2nd |first=Michael |last=Pidwirny |date=2006}}</ref><ref name="usatoday2011">{{cite web |url=http://traveltips.usatoday.com/climate-nashville-tennessee-59007.html |title=Climate of Nashville, Tennessee |work=[[USA Today]] |series=Travel Tips |first=Amy |last=Harris |date=2011 |access-date=December 26, 2016}}</ref> Snowfall occurs during the winter months, but it is usually not heavy. Average annual snowfall is about {{convert|4.7|in|cm|0}}, falling mostly in January and February and occasionally in March, November and December.<ref name="NOAA">{{cite web |url=http://www.nws.noaa.gov/climate/xmacis.php?wfo=ohx |title=NowData – NOAA Online Weather Data |publisher=National Oceanic and Atmospheric Administration |access-date=December 21, 2011}}</ref> The largest snow event since 2003 was on January 22, 2016, when Nashville received {{convert|8|in|cm|0}} of snow in a single storm; the largest overall was {{convert|17|in|cm|0}}, received on March 17, 1892, during the [[St. Patrick's Day Snowstorm]].<ref name="noaa-nash-snowst">{{cite web |url=http://www.srh.noaa.gov/ohx/?n=snowstorms |title=Snowstorms Producing at Least 6" at Nashville |work=NOAA.gov |date=November 17, 2009 |access-date=December 30, 2009}}</ref> Rainfall is typically greater in solar spring (Feb-Apr) and summer (May-Jul), while the solar autumn months (Aug-Oct) are the driest on average. Spring and fall are prone to [[severe thunderstorm]]s, which may bring [[tornado]]es, large [[hail]], flash floods and damaging wind, with recent major events on [[Tornado outbreak of April 15–16, 1998|April 16, 1998]]; [[Tornado outbreak of April 6–8, 2006|April 7, 2006]]; [[2008 Super Tuesday tornado outbreak|February 5, 2008]]; [[Tornado outbreak of April 9–11, 2009|April 10, 2009]]; [[2010 Tennessee floods|May 1–2, 2010]]; and [[March 2020 Tennessee tornado outbreak|March 3, 2020]]. Relative humidity in Nashville averages 83% in the mornings and 60% in the afternoons,<ref>{{cite web |url=http://www.cityrating.com/cityhumidity.asp?City=Nashville |title=Nashville Relative Humidity |work=Cityrating.com |access-date=August 4, 2008}}</ref> which is considered moderate for the Southeastern United States.<ref>{{cite book |title=Cities of the United States |publisher=Thomson-Gale |location=Detroit |author=Gale Research |volume=1 |edition=5th |year=2006 |page=511 |isbn=0-7876-7369-2}}</ref> In recent decades, due to urban development, Nashville has developed an [[urban heat island]]; especially on cool, clear nights, temperatures are up to {{convert|10|F-change|1}} warmer in the heart of the city than in rural outlying areas. The Nashville region lies within USDA Plant Hardiness Zone 7a.<ref>{{cite web |url=http://planthardiness.ars.usda.gov/PHZMWeb/ |title=USDA Plant Hardiness Zone Map |publisher=United States Department of Agriculture |access-date=September 5, 2013 |archive-url=https://web.archive.org/web/20140227032333/http://planthardiness.ars.usda.gov/PHZMWeb/ |archive-date=February 27, 2014 }}</ref> From 1970 to 2020 the average summer temperature has risen 2.8 degrees F (1.5 C).<ref>{{Cite web |date=July 22, 2022 |title=An urban heat island: How average summer temperatures keep rising in Nashville |url=https://www.newschannel5.com/news/an-urban-heat-island-how-average-summer-temperatures-keep-rising-in-nashville |access-date=August 2, 2022 |website=WTVF |language=en}}</ref> Nashville's long springs and autumns combined with a diverse array of trees and grasses can often make it uncomfortable for [[allergy]] sufferers.<ref>{{cite news |url=http://tennessean.com/apps/pbcs.dll/article?AID=/20070321/FEATURES04/703210425/1082/NEWS07 |title=Nashville's an allergy leader, but it's not alone |work=The Tennessean |first=Joy |last=Buchanan |date=March 21, 2007 |access-date=March 21, 2007}}{{dead link|date=April 2014}}</ref> In 2008, Nashville was ranked as the 26th-worst spring allergy city in the U.S. by the [[Asthma and Allergy Foundation of America]].<ref name="allergy08">{{cite web |url=http://aafa.org/pdfs/FINAL%20public%20LIST%20Spr2008.pdf |title=Spring Allergy Capitals 2008 |work=AAFA.org |access-date=April 29, 2008 |archive-url=https://web.archive.org/web/20080528122240/http://aafa.org/pdfs/FINAL%20public%20LIST%20Spr2008.pdf |archive-date=May 28, 2008 }}</ref> The coldest temperature ever officially recorded in Nashville was {{convert|-17|°F}} on [[Winter 1985 cold wave|January 21, 1985]], and the hottest was {{convert|109|°F}} on [[2012 North American heat wave|June 29, 2012]].<ref name="records">{{cite web |url=http://www.srh.noaa.gov/ohx/?n=calendar |title=Calendar of Significant Weather Events in Middle Tennessee |work=NOAA.gov |date=August 3, 2009 |access-date=September 22, 2009}}</ref> Nashville allegedly had a low of {{convert|-18|°F}} on January 26, 1832, but this was decades before record-keeping began and isn't counted as the official record low.<ref>{{Cite web|url=https://www.weather.gov/ohx/calendar|title=Calendar of Significant Weather Events in Middle Tennessee}}</ref> {| class="wikitable" !Threshold !Number of days |- |High > 80 |139.0 |- |High > 90 |48.2 |- |Low < 32 |71.4 |- |High < 32 |7.3 |- |Low < 10 |3.0 |} ====Donelson==== The mean annual temperature at Nashville International Airport is {{convert|60.8|F|1}}. Monthly averages range from {{convert|39.6|F|1}} in January to {{convert|80.7|F|1}} in July, with a [[diurnal temperature variation]] of {{convert|18.9|to|23.7|F-change|C-change}}. Diurnal temperature variation is highest in April and lowest in December, but it is also relatively high in October and relatively low in January. Donelson's climate classifications are [[Köppen climate classification|Köppen]] ''Cfa'' and [[Trewartha climate classification|Trewartha]] ''Cfak'' thanks to its very hot summers (average over {{convert|71.6|F|1}}), mild winters (average over {{convert|32.0|F|1}}) and long (8+ months) growing seasons (average over {{convert|50.0|F|1}}). Precipitation is abundant year-round without any major difference, but there is still slight variation. The wet season runs from February through July, reaching its zenith in May with 128 mm of rain. The dry season runs from August through January with an October nadir of 85 mm and secondary December peak of 113 mm. {{Nashville, Tennessee weatherbox|NOAA=Weather information}} ====Old Hickory==== The mean annual temperature at Old Hickory Dam is {{convert|58.5|F|1}}. Monthly averages range from {{convert|37.1|F|1}} in January to {{convert|78.6|F|1}} in August, with a [[diurnal temperature variation]] of {{convert|19.8|to|26.3|F-change|C-change}}. Diurnal temperature variation is highest in April and lowest in January. Old Hickory's climate classifications are [[Köppen climate classification|Köppen]] ''Cfa'' and [[Trewartha climate classification|Trewartha]] ''DOak'' thanks to its very hot summers (average over {{convert|71.6|F|1}}), mild winters (average over {{convert|32.0|F|1}}) and mediocre (4–7 months) growing seasons (average over {{convert|50.0|F|1}}). Precipitation is abundant year-round without any major difference, but there is still slight variation. The wet season runs from February through July, reaching its zenith in April with 120 mm of rain. The dry season runs from August through January with an October/November nadir of 85 mm and secondary December peak of 113 mm. Data for record temperatures is spotty before June 2007, but temperatures in Old Hickory have been known to range from {{convert|-10|F|1}} in January 1966 to {{convert|106|F|1}} in June and July 2012. {{Weather box |location = Old Hickory Dam, TN (1991–2020 normals, extremes 1965–present)<ref>{{Cite web|url=https://www.weather.gov/wrh/climate?wfo=ohx|title = Climate}}</ref> |collapsed = Y |single line = Y |Jan record high F = 73 |Feb record high F = 79 |Mar record high F = 86 |Apr record high F = 91 |May record high F = 94 |Jun record high F = 106 |Jul record high F = 106 |Aug record high F = 105 |Sep record high F = 101 |Oct record high F = 96 |Nov record high F = 87 |Dec record high F = 76 |year record high F = |Jan avg record high F = 67 |Feb avg record high F = 72 |Mar avg record high F = 79 |Apr avg record high F = 86 |May avg record high F = 91 |Jun avg record high F = 96 |Jul avg record high F = 97 |Aug avg record high F = 97 |Sep avg record high F = 95 |Oct avg record high F = 88 |Nov avg record high F = 77 |Dec avg record high F = 69 |year avg record high F = 99 |Jan high F = 47.0 |Feb high F = 51.4 |Mar high F = 60.5 |Apr high F = 71.3 |May high F = 78.9 |Jun high F = 86.1 |Jul high F = 89.9 |Aug high F = 90.2 |Sep high F = 83.4 |Oct high F = 72.1 |Nov high F = 60.1 |Dec high F = 50.2 |year high F = 70.1 |Jan mean F = 37.1 |Feb mean F = 40.7 |Mar mean F = 48.6 |Apr mean F = 58.2 |May mean F = 66.9 |Jun mean F = 75.1 |Jul mean F = 78.5 |Aug mean F = 78.6 |Sep mean F = 71.6 |Oct mean F = 59.7 |Nov mean F = 47.9 |Dec mean F = 39.5 |year mean F = 58.5 |Jan low F = 27.2 |Feb low F = 30.0 |Mar low F = 36.8 |Apr low F = 45.0 |May low F = 54.9 |Jun low F = 64.1 |Jul low F = 67.0 |Aug low F = 67.0 |Sep low F = 59.8 |Oct low F = 47.2 |Nov low F = 35.7 |Dec low F = 28.8 |year low F = 47.0 |Jan avg record low F = 10 |Feb avg record low F = 13 |Mar avg record low F = 21 |Apr avg record low F = 31 |May avg record low F = 40 |Jun avg record low F = 54 |Jul avg record low F = 59 |Aug avg record low F = 58 |Sep avg record low F = 48 |Oct avg record low F = 33 |Nov avg record low F = 22 |Dec avg record low F = 17 |year avg record low F = 9 |Jan record low F = -10 |Feb record low F = 0 |Mar record low F = 8 |Apr record low F = 21 |May record low F = 34 |Jun record low F = 47 |Jul record low F = 52 |Aug record low F = 54 |Sep record low F = 36 |Oct record low F = 26 |Nov record low F = 14 |Dec record low F = 6 |year record low F = |precipitation colour = green |Jan precipitation inch = 3.73 |Feb precipitation inch = 4.26 |Mar precipitation inch = 4.64 |Apr precipitation inch = 4.74 |May precipitation inch = 4.55 |Jun precipitation inch = 3.76 |Jul precipitation inch = 4.05 |Aug precipitation inch = 3.38 |Sep precipitation inch = 3.70 |Oct precipitation inch = 3.33 |Nov precipitation inch = 3.35 |Dec precipitation inch = 4.44 |year precipitation inch = 47.93 |snow colour = |Jan snow inch = 0.6 |Feb snow inch = 0.3 |Mar snow inch = 0.2 |Apr snow inch = 0 |May snow inch = 0 |Jun snow inch = 0 |Jul snow inch = 0 |Aug snow inch = 0 |Sep snow inch = 0 |Oct snow inch = 0 |Nov snow inch = 0 |Dec snow inch = 0.1 |year snow inch = 1.2 |source 1 = https://www.weather.gov/wrh/climate?wfo=ohx }} Summary: Please note that all contributions to Christianpedia may be edited, altered, or removed by other contributors. 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