I've learned to embrace weather variances and commute year round regardless of weather. Temp range 15F - 115F, rain or shine, windy or calm. That said, I'm more fortunate than most.

I have access to a locker/shower at work
I live where its sunny 300 days a year
It rarely ever snows and besides the summer heat, no extreme weather
Even the worst storms pass through fairly quickly ... I just wait them out

It can run 110F for a month straight here in the summer ... getting caught in a sudden downpour, priceless.