Cloudiness - Mean number of days (Clear, Partly Cloudy, Cloudy)
Data through 2008StateYrsJanFebMarAprMayJunJulAugSepOctNovDecAnnual
CLPCCDCLPCCDCLPCCDCLPCCDCLPCCDCLPCCDCLPCCDCLPCCDCLPCCDCLPCCDCLPCCDCLPCCDCLPCCD
BIRMINGHAM APAL377618761578169813811127131051412715109911148910713871699111155
HUNTSVILLE AL2776187616781797148101481111713119131099121271297148618100101164
MOBILE AL4786178714981499129111171494151261510910111489117129616102116147
MONTGOMERY AL517617861488151081291012812106141181491091114710116139616107107151
ANCHORAGE AK447519641885186618472037203622362245215521652064216165239
ANNETTE AK414423342145233621472126214621462146212425332434244060265
BARROW AK5462312611147101171235233621372114261326242563114006652187
BARTER IS.AK344381061212812981336223720391916232424252454150005366192
BETHEL AK3485181041495166617482027212524242625234522651985186265239
BETTLESAK51551110414951671013711134131321019282177165621961497158693187
BIG DELTAAK31489571788152920211184917*822282157184523761777176093212
COLD BAYAK422523252226231426*327*327*228*229*4261525162325241050304
FAIRBANKS AK459616861410714781651115310173919372146204522751876187086210
GULKANAAK515412641896155101531018210184918391968173721552177176789209
HOMER AK158419741766195618472048183919581857185521651975186575225
JUNEAU AK476323432143234422442334223523452233242227422432254441280
KING SALMON AK428518751686184720362215241525152526224720651976195169245
KODIAK AK255620651867184619352236213622472047196817771666195974232
KOTZEBUE AK5211416123131261310713891461014481946216519851994171141610072193
MCGRATH AK559517941596157715481929192821252335224522641985196772226
NOME AK5110417124131151496147816691547203622562076187418104179169205
ST. PAUL ISLAND AK662623362037212622142613261228132815241723162215241861287
TALKEETNA AK10642184169418551866191121757193111754196520731952226767225
UNALAKLEET AK48420103151061595165917571828216620471965218518114168367215
VALDEZ AK265421532084196619472036203523472045214423642053235757251
YAKUTAT AK485322432154224521252425242425342434243325432343244146278
FLAGSTAFF AZ43126121161112812129915971884913910138161051777157814611162102102
PHOENIX AZ571471013791488177621732352171041810422532064186615692118570
TUCSON AZ5514710137915791776207421631012912127197420651866156101939181
WINSLOW AZ37127121271013991597179520741112812136188419761668147101779989
YUMA AZ321579157617762164245225412083226324422353196517782427152
FORT SMITH AR4996169614971597148101310101012118121181281014711116131071512395147
LITTLE ROCK AR359616961397159714811129129913912119119101479116139616119100147
BAKERSFIELD CA55781778131091212991895235226312641244219751281078161918193
BISHOP CA291181211810139914971510620732272236223522075158714792018975
BLUE CANYON CA3195178515961710713128111856264125422243176910515951717464126
EUREKA CA95661956175817681661014710136111461115991289146717671877102186
FRESNO CA46571988131181214881885235227312631244220651271176181947398
LONG BEACH CA381281110711119111210810138121261811219102151141311713881381015911987
LOS ANGELES AP CA6012811116111291111991011101011913135141251310613108158813810147116103
LOS ANGELES C.O. CA3414891279139912108111281410621912271188316961676158818610673
MOUNT SHASTA CA2296168713881510101012810167725522442215414799713781616483118
REDDING CA985188614871788131191017852541255222431876118111051617277116
SACRAMENTO CA4976198713109121210817952262273126412442196610812861718877100
SAN DIEGO CA5512711108101191110101081111912913135151241510614108158714810146117102
SAN FRANCISCO AP CA689815871310913119101410816952183199318841697118119814160100105
SANTA MARIA CA4513711126101381013981410715114171221713216104179515781471017611080
STOCKTON CA465619771510813129101785226327312641234219669812771818477104
ALAMOSA CO331310811107101191013891481412491761114615105178614971410714813781
ALAMOSA CO2166686784388811761465166151091022106366412821247554
COLORADO SPRINGS CO441281198119913810127121210128915710138148715881281012811127120118
COLORADO SPRINGS CO3522857867568152342742688114610156221141825150
DENVER CO611091189118101371113612131012891661014813981399101010111010115130120
GRAND JUNCTION CO49971587138815891310111115961411613116168515881171210813136106122
PUEBLO CO50129101081110912910119121112117111451212715861588129912910139119107
PUEBLO CO3114395672510854741142156281159221145102215421205944
BRIDGEPORT CT4688158713891479147101481012712129111210912118128814881599107159
HARTFORD CT41881578147816691561016610146121371113891399136816771782108175
WILMINGTON DE4777177714881578147101481112811129101210812118128814871697104164
WASHINGTON DULLES AP DC337717761578167914710146121281112811129912118127815771792105168
WASHINGTON NAT'L AP DC4877167715781579147101471111712129101210812118128814871696106164
APALACHICOLA FL6210851071211812129913108913861311713111010101677138910813128113116
DAYTONA BEACH FL5299139812101012111191011106131251412515115131291011101010991397132136
FORT MYERS FL541112910117111281113610156516102181121910416111113811127111289816899
JACKSONVILLE FL479814971299131010991210513125141251511512131091210911981494127144
KEY WEST FL4311119121071311613116101385141131611317113151291391011811119104155107
MIAMI FL469139812891488157615931413317112181121512714108149913974175115
ORLANDO FL479101299119101210119914941412317113171141512911111010101091289147130
PENSACOLA FL29871697139814109119111171584171061510101191399118119716105123137
TALLAHASSEE FL3487158713991311109913106141041710516108121013810118119814102129134
TAMPA FL4910101299101110101111811138614103161231711514111110912109101011101143121
WEST PALM BEACH FL488111281110813109138814104131341413316123141361411713109121075159131
WEST PALM BEACH FL1166832764913856868941413316123141361411713102310303229
ATHENS GA52971596139714108119101281210713118131010911147101261210615113105147
ATLANTA GA61861686149815108129111181210613127131010101014710126129615110107149
AUGUSTAGA4496169613981411811811128111161312714109911147101261210615112106147
COLUMBUS GA4986178614971510911910128121051312814101091114710126129616110104151
MACON GA4687168713981411811911118111161312812109101114710126129715112107147
SAVANNAH GA4596168614991311911910127111261412614127101312811117129715104110152
HILO HI506111351013310181920111192111711218212173121531216310175111536132197
HONOLULUHI4791398128814961410716961767185817681667158714981499018194
KAHULUI HI371310811971111981210101481113611155121451213611138111181211813114590
LIHUE HI468131071295141231413317113179319104189518751610414126141156184125
BOISE ID5645225617671869158101312108207319841776128116618562012090155
LEWISTON ID423424352146215619691689131876168713799715362234249178196
POCATELLO ID4637224618581868167101412991795161151587128115718372110698162
CAIROIL308617861498158913810138121091310121181299157998138716113104149
CHICAGOIL377618661658186816710147111181210911119101199145618661984105176
MOLINE IL62871676156817791589147111210129101110128111281277167618101100164
PEORIA IL5276187616671868167101471112912101010101191011812761776199597172
ROCKFORD IL45771776156817681689147111291210911111091210713661876199398174
SPRINGFIELD IL4876177615671878158914891210111011101012810127128616761810494167
EVANSVILLE IN557519761578167815891481110912911119118101371187157618102100163
FORT WAYNE IN49562057175719671779156121281211912119912108145619462178102186
INDIANAPOLIS IN64661966166718671779157111281210912101191111812671756208899179
SOUTH BEND IN56362246195719681771014710128131091210991298144620362273100193
DES MOINES IA4687168615771778158815810111011911101012811127127716771710597164
DUBUQUEIA21771786156817681679166111381210910111081210813761776189299175
SIOUX CITY IA5588157714781779157915811111112812119128111281277167716104104157
WATERLOO IA358716761567186816791471112912119111110812108145718761891100174
CONCORDIA KS3011713971397159813891310101014107131081371013711107131071413195140
CONCORDIA KS3620840103074011401360118016308201040740940116482
DODGE CITY KS501181298129814991291012111081312714107147915791281111712137104124
DODGE CITY KS363956610559481245145316431653912106484413351285157
GOODLAND KS72129101091091012910119111112116141251312614971587128912910143117105
GOODLAND KS36498487458311856144413521446993123684514251214269
TOPEKA KS461061586147716881471014810111111912109128101371110714971511497154
TOPEKA KS344109377568410114611656961274714102862810381025183
WICHITA KS3911614871397159813810139111013117131081371013711117131071412897140
WICHITA KS36587687486291186107315431652632104572811481145570
GREATER CINCINNATI APKY445620561757196817610157101381212812111091110713661856208198186
JACKSON KY144522451967186816681761213712127121289129814661855217397195
LEXINGTON KY5166206617671869157101471211812119121010811127127717661989101174
LOUISVILLE KY476620661667186915891481111813101011910911128127616661993102171
PADUCAHKY1176186815781688147915712111011101111811811117139417761710197167
BATON ROUGE LA42761886158815891381112714951511715991110148810813871699119147
BATON ROUGE LA110414106158387691361671810979108432105386372259067106
LAKE CHARLES LA34761986157816791571112813961410715910119139910813871798115152
NEW ORLEANS LA477717861488158101291111813951512714101011101489108128716101118146
SHREVEPORT LA43851885158616881481013913910129111281191013710116139616114100151
CARIBOU ME5477176616771757184918310173131551115591558183621671959100206
PORTLAND ME5410714971397157716691571013711139111110812108137715971510199165
BALTIMORE MD45881587148914891381013811109121091111119111281188138716105108152
BOSTON MA6097158713881578156101571013712129111110812118128715971598103164
WORCESTER MA409814871488167915610156111361213811129912108137815881690107168
ALPENA MI363721471768176816710148111281310911126101458182622262367104194
DETROIT MI374720571767186816710148111191210911118101289154719362275105185
FLINT MI544621471757196717610156121271311812117101379153621362266105195
GRAND RAPIDS MI323523361957196717791571112812118111279146817352224256496205
HOUGHTON LAKE MI3036224717671867177914711127131081112691458182523262365100200
LANSING MI41372147175818671771014711118131081211891379154621362371104191
MUSKEGON MI5323263521571877168914910121111911111099127815242324267588202
SAULT STE. MARIE MI544622561777176716791571013811128111359175719242434236690209
DULUTH MN47771776157717681661015511147131171211691578175620661977102187
INTERNATIONAL FALLS MN5677168614881678157915511146131171212691567184521661976101188
MINNEAPOLIS-ST.PAUL MN5787158714771778157915710121012910111010812107145618661895101169
ROCHESTER MN357716761567186716791571113812119111197148815561966198697182
SAINT CLOUD MN50881587137717771671014711121012910111010912108136618771897102166
JACKSON MS3086178614971597138101291298131091391091015710107139616111104150
JACKSON MS284151241310410126516812141299414975591671251733511052108
MERIDIAN MS5077177615871598139111281396151091391091114710107139716108110148
TUPELO MS108617761587161081281013911911118121281398146119615861811997150
TUPELO MS21031494141078144518487116871110734117295193371044796
COLUMBIA MO26861676157717871578167111211101011101011812127138616861710491169
KANSAS CITY MO231061486148816971489141010111311712118128101371197141061512096149
ST. LOUIS MO47771776156816781579147111291110101110118101271197157717101101164
SPRINGFIELD MO50871676158816881471014810111210912109127111371110614961611596155
BILLINGS MT566818481649184917610157121113126141171091099136817681789112164
GLASGOW MT39571857165917581661115712111212712118991189156717581886111168
GREAT FALLS MT575619461849184818510175111413126121181091179155718581879106180
HELENA MT545620471748194918510166111314116131171191189145718472082104179
KALISPELL MT45242525213621462059176101414971299108126718252323267081214
MISSOULA MT512424352136224720591769141510614108108117717252324257583208
GRAND ISLAND NE5498147713881589138914101091311713108147913810971310714123102140
GRAND ISLAND NE25311747747669939124511841445823936946102101064881
LINCOLN NE281071587138815881481013101010121091210913810128129715871511799149
LINCOLN NE33255164348814327644424105495512276246612713562
NORFOLK NE509815871478168814810141010101311713108138101281187149815117103146
NORTH PLATTE NE43991477147816791471014101191212712118138912810981310813115109141
OMAHA EPPLEY AP NE49981477147816781471014811111112812109128101381097148815111105149
OMAHA (NORTH) NE18981486158816881471014911101110101011913891181287158715110102153
SCOTTSBLUFF NE52881478136101579156111410119131261311714881381088149914115112138
VALENTINE NE40981477137815881481013111091412614116147912810981310714123105136
ELKO NV5678176715681769158101313107171041894187514898715871613099136
ELY NV5698157714781579137111213106151151512517851489108129814131109125
LAS VEGAS NV47146111279148916871885225320732273225220641677157102108273
RENO NV5387167714891481012121010168622632263216416889813881515893114
WINNEMUCCA NV45771866167717691491012149820741984186514798715861613889138
CONCORD NH54971588138815781561015612127121281112991299136816881590109166
MT. WASHINGTON NH734621451846214620372027211822382047196619352145224477244
ATLANTIC CITY AP NJ3788158714881579146111471212712138111210812119128913881594111160
NEWARK NJ5388167813881579146111471112712128121210912118128814881593112160
ALBUQUERQUE NM5613810118101110101310814107179412145131351786178615871471016711187
CLAYTON NM2813712117101191112910119101310612127151061767187715691471016299104
ROSWELL NM91191112881498149713126171031115513126138918671677159716811384
ALBANY NY57581867156817581659165111361312712138101289144818571969111185
BINGHAMTON NY44372236194720571859175111461313512146101468173621262352102212
BUFFALO NY521624262048195817610166121271311712126101468162523162454103208
NEW YORK C.PARK NY42891489119101281112812118121081310912101110912109910129913107127132
NEW YORK (JFK AP) NY3788158813891489137111371112712118131010911119118814881598116152
NEW YORK (LAGUARDIA AP) NY4788158713891479137111371111713118121110911119117814891596117153
ROCHESTER NY552722271958186816610157111281211812127101368162622262361104200
SYRACUSE NY44372236195719671761015711128121171113710136817262225246398205
SYRACUSE NY0373365371167175693106812117111371013681726222524112334
ASHEVILLE NC3197159613981410812710136121251412513137111312811117121071499113153
CAPE HATTERAS NC389716951410714109119101371012710148101310911118121081210714109101156
CHARLOTTE NC4996168614981410912810137111271212713119911138101161210615109105152
GREENSBORO-WNSTN-SALM-HGHPTNC67971596139814108128111271211713127121110912137101171210615109107150
RALEIGH NC47971596149714109118101381211712127121110911137111171110714111106149
WILMINGTON NC4410615961310814118118111271112612137121281012127111271110714111104150
BISMARCK ND567817681568176915610147101211137121181091198146717771793107165
FARGO ND53771767155917691571014611131013810129991298145618671888109168
WILLISTON ND346817681578166915611138111112127111281091198146716771793112160
AKRON OH473622361956205818691661113713118121189129814462035236899198
CLEVELAND OH54352436205620581761015711128121191111810128815362135246697202
COLUMBUS OH464621461857195817610156111371311713119912108135719462172103190
DAYTON OH52562056175719571769166101371211812119912108135718462177100188
MANSFIELD OH30462146185719681671015712118131081111991298144620352373101191
TOLEDO OH405720571757196817710147121281310812118101289144719362273107185
YOUNGSTOWN OH5235233520562057186917611127131171212710138815362135236397205
OKLAHOMA CITY OK4411614971310813981391012101191510714107138914710127111261313996130
OKLAHOMA CITY OK345710310837102896613531642154373212456468581194968
TULSA OK54107149613981489138101391110131171311712810147101171210713127103136
TULSA OK3548837819101101049118414641554844104671109571134583
ASTORIA OR40342433223523362138203719610156101587145719352234245076239
ASTORIA OR15815641535235198614271259106681222451283233855114
BURNSOR1158186617671851015910121299197520831686127126717571812094151
EUGENE OR532425342136224719691788141687149812895917262314267582209
MEDFORD OR67352446195719681699131389235322641866108123621242511779169
PENDLETON OR602524362058195101581113101010198418851587108134620352410191173
PORTLAND OR4734243421352336215719681613810111010108125818342323266874222
SALEM OR5835243421462147196818781515881499118106817352224257780208
SEXTON SUMMIT OR305521442055216717971413710235321641767116146520542212668172
GUAM PC20313152101631513115141161511119*9220526*623*1021213153121616134215
JOHNSTON ISLAND PC24131441113411146712116131271587169614116131171212712121113799159107
KOROR PC53*723*7211921110191921*524*525*526*6231822*822*724486273
KWAJALEIN PC442721262028212623172316231624162315241525162326231776272
MAJURO PC4917231819182217221723*723072418221722172307231624786271
PAGO PAGO PC390102109181121811217113172141511514216142141411317111181102012151202
POHNPEI PC53*426*424*526*525*526*5250624172416240624*624*526264298
CHUUK PC54*427*325*427*426*427*426*427*427*426*427*426*328045318
WAKE ISLAND PC4312135121151214511146101461013771113611147111291210121351413412114994
YAP PC561822082019211101911120*6240526*427*6240723*8210922590270
ALLENTOWN PA527816781388157914711148111181211911119912109127815771794110161
ERIE PA40242536205719681771014811118131081211710146817352314266397205
HARRISBURG PA537717771478166915610157121271212811129912108136815681787109169
MIDDLETOWN/HARRISBURGPA6178177714781679156111461212712128121291012109136815681785112168
PHILADELPHIA PA5578167714881579146111471112712128111110911119127914781593112160
PITTSBURGH PA43362236194720481759175121351313712137101389144620362359103203
AVOCA PA404720571758186816610167111261312712127101388144719472070106189
WILLIAMSPORT PA515719571668176816510156121261312613126111479154719472067110188
BLOCK IS.RI198914881299138813711138101271113711131091111812710147101498113155
PROVIDENCE RI4210715871388157814610157101371212810129812118128715881598103164
CHARLESTON APSC4796169613981411811811126111351213613137101311811127129714102109155
COLUMBIA SC48961696139814118119101181111713128121110912137111261210615115103147
GREENVILLE-SPARTANBURG AP SC33106151051310813118118101381111713118121110911147101261211614121100145
ABERDEEN SD28881676156717771681014910111113712118118111081366187717101101163
HURON SD56881568146817791581014911101212712117128101181277167716104107154
RAPID CITY SD53881568146915610157111391110131351412513981281188148814111115139
SIOUX FALLS SD50881577156817781571014911111212812119128101181277168716105103157
BRISTOL-JHNSN CTY-KNGSPRTTN58671867167817891471114613116131271411101011128118714771788112165
CHATTANOOGA TN6577177615881698139101281210713118131010101113810107138617104106155
KNOXVILLE TN5367187616771689138101371210713118121010911128119714771797107162
MEMPHIS TN43861786158717971481013101191012912127128101471010614961611896151
NASHVILLE TN54661876158716881381013812108131010129119101381097147717102106156
OAK RIDGETN4277178615871610713991391010812119111010911147109714861710998158
ABILENE TX561161410612117121281110101113117141071410714881579136111261314995121
AMARILLO TX51137111071012911129911101013116131251410715781778157913710157104104
AMARILLO TX3855104611331245115618521732162410121224103413541464344
AUSTIN TX54961686149815881561113815712136121451111912991171210615115114136
BROWNSVILLE TX526718761578165101561411815611146111479138111279912771796131138
CORPUS CHRISTI TX5377177615781669155121391471114611137101281210899128617102121142
DALLAS-FORT WORTH TX42106161061310814981381013111281510615106139914710126121161413597133
DEL RIO TX16107141071111813871469168139121181112891110128101271111614121106138
EL PASO TX5314710147715871785198420731213514125187519751866157919310072
HOUSTON TX2675187516761877166111471397168617891110119119714761890114161
LUBBOCK TX4912612117101291112991111914116141161510614881778157913711160102103
MIDLAND-ODESSA TX47126121171013810138913108159513117141061488176815691461116596104
PORT ARTHUR TX42761886157717681671212814871597159911101210910713861795117153
SAN ANGELO TX471261311611128111181111101014106151071510613881578146101271215497114
SAN ANTONIO TX5396168614971578156111471589157101569129111091071310616105119141
VICTORIA TX34761876167718581751115615971587159812101110109714761986118162
WACO TX50961696141071497148101310128141061411612981389126121161513098136
WACO TX3526918937744655103210421432532824326446893653
WICHITA FALLS TX501161410612118121181111911131171597159615781579136111261315193120
WICHITA FALLS TX2126111548934106418612241021961164232112331381551405860
MILFORD UT409814881298131010111110917851610516105187417771181110813151104111
SALT LAKE CITY UT696619571678167914910121410617104161141685148987156618125101139
BURLINGTON VT52562047176718581759175111451313612136101468173522362258101206
LYNCHBURG VA4997158713991399128101381210812119111110911137111071310714112107147
NORFOLK VA47971686149815991281013712117121281211991112712108129715106107153
RICHMOND VA5087168614881589137101471212712127121299121271298139615100106160
ROANOKE VA48881587148814991371113712117131181211109121371198139814102112151
OLYMPIA WA5424252422362237204918581610101191012810133820252324265284228
QUILLAYUTE WA293324442146223621382047206916691688145719352244245175239
SEATTLE C.O. WA2435233619481959167101478151210910101198135818362135237193201
SEATTLE SEA-TAC AP WA513424342136223720491858171010119101289134719242324255882226
SPOKANE WA48342435205819481761015710121686159712898815352234248688191
YAKIMA WA4945224618681769148111210101019841886158798135619452210992164
SAN JUAN PR40918471649174717641612416105179517841795179518771867320389
BECKLEY WV325521451856205717591731016312164121669159814571856216095210
CHARLESTON WV474621461858196816610155131251313514127111299135718562065111189
ELKINS WV49362236194620481849173111621316314154111578135619452148103212
HUNTINGTON WV344621451957195817691751114512145121479149814561955216399203
GREEN BAY WI46871777157816681671014811128121181112891378155619661985102178
LA CROSSE WI17771787137717771679157101210111091111991211713661876189597173
MADISON WI497617761567176816791571013911119101298129714561866198996180
MILWAUKEE WI5576186615681768167101481012101110101110991298135618661990100175
CASPER WY4578166814691659166111510119141161311713981181278148815107111147
CHEYENNE WY609101379127101461014512149129101571013813991399109119913106127133
LANDER WY49810137101271014610146111410119141161312614981291081012101012114122129
SHERIDAN WY556817581559175916610158121113126141161299109126816781795113157
This table shows the mean number of days per category of cloudiness. The categories are determined for daylight hours only.
(a) Clear (CL) denotes zero to 3/10 average sky cover; (b) Partly cloudy (PC) denotes 4/10 to 7/10 average sky cover; (c) Cloudy (CD) denotes 8/10 to 10/10 average sky cover.
Asterisks (*) denote average frequency of occurrence greater than zero, but smaller than one half.