I'm torn here.  The temptation to go with Clear and Warm is there, but ... I probably overthink things.<br/><br/>How long does the change last?  Going to Spring warm from winter temperature plays havoc with nature if it lasts very long, possibly leading to things like early budding/bloom of plants which then often get set back by a late frost or freeze which affects fruit/berries, etc.<br/><br/>Clear and Cold seems safest, unless the period affected is narrow.