Rollers in May?

Last weekend I cleaned the garage mess from a long winter. I took the rollers and the fan out of the house...thinking spring is in full swing. That must have been what made the weather change. This week we have had rain and possibly light snow on the passes.
The Iron Horse Road Race is saturday, crit sunday and TT monday.
Last night riding the rollers in the basement with my ipod made me think
I was back in the winter mode. Weather in the mountains can change so quickly.
I hope it's clear for tomorrow's road race..we have well over 2500 racers in town. It can be dangerously cold at 10,900 feet at 9 in the morning..even at the end of May!!