ice age?

so, i work in the sun day after day, week after week in 100-degree-plus weather. yet i survive knowing that in a few short days i will be floating on the lake in an inner tube, ridding myself of my farmer's tan, and cooling off with a dip in the lake when needed/desired. well, guess what folks: those few short days are over and here i am at the lake. however the bloody temperature here is merely HALF the norm, so instead i am wearing every article of clothing i brought, every blanket from the bed, and i am frigging cold. 45 degrees last night. that's right. can't win.