As of today, it has been three months since I last drove to work. Although I was on vacation for two weeks, so I am requiring myself to bike for an additional two weeks before I think about driving, and truly, I will go for as long as possible after that. I am also confident that I will be able to start biking earlier in the year next year. Although I was biking pretty regularly in April and May.
This morning was very chilly--maybe 40 or so. However, I recently purchased a fleece and cycling jacket combination from REI, and gloves from my local bike shop, and I've been fairly comfortable on those brisk mornings and in the windy afternoons. I also bought a Buff head scarf thing, which works incredibly well as both a helmet liner and a neck gaiter.
Proper clothing makes all the difference.