, ▁with ▁warm , ▁dry , ▁sun ny ▁sum mers ▁and ▁m ild , ▁wet ▁winter s ▁with ▁persist ently ▁over cast ▁sk ies . ▁Spring ▁and ▁fall ▁are ▁also ▁mo ist ▁seasons ▁with ▁varied ▁cloud iness , ▁and ▁light ▁rain ▁falling ▁for ▁extended ▁periods . ▁ ▁Winter ▁snow ▁is ▁rare , ▁but ▁occasionally ▁does ▁fall , ▁and ▁amounts ▁can ▁range ▁between ▁a ▁dust ing ▁and ▁a ▁few ▁inches ▁that ▁do ▁not ▁persist ▁on ▁the ▁ground ▁for ▁more ▁than ▁a ▁day . ▁The ▁north west ▁hills ▁will ▁often ▁experience ▁more ▁snow . ▁During ▁the ▁mid w inter ▁months ▁after ▁extended ▁periods ▁of ▁rain , ▁thick , ▁persistent ▁f ogs ▁can ▁form , ▁sometimes ▁last ing ▁the ▁entire ▁day . ▁This ▁can ▁sever ely ▁reduce ▁visibility ▁to ▁as ▁low ▁as ▁. ▁The ▁fog ▁often ▁pers ists ▁until ▁a ▁new ▁storm ▁system ▁enters ▁the ▁area . ▁This ▁fog ▁could ▁be ▁seen ▁as ▁a ▁type ▁of ▁t ule ▁fog . ▁ ▁Rain fall ▁tot als ▁within ▁the ▁town ▁itself ▁are ▁surprising ly ▁variable , ▁due ▁to ▁Cor v all is ▁lying ▁right ▁on ▁the ▁eastern ▁edge ▁of ▁the ▁Oregon ▁Coast ▁Range , ▁with ▁a ▁small ▁portion ▁of ▁the ▁town ▁inside ▁of ▁the ▁range . ▁Rain fall ▁amounts ▁can ▁range ▁from ▁an ▁average ▁of ▁ ▁per ▁year ▁ ▁in ▁the ▁far ▁north west ▁hills , ▁compared ▁to ▁ ▁per ▁year ▁at ▁Oregon ▁State ▁University , ▁which ▁is ▁located ▁in ▁the ▁center ▁of ▁Cor v all is . ▁ ▁Because ▁of ▁its ▁close ▁proxim ity ▁to ▁the ▁coast