Yes, it is time change to warmer biking clothes. No more biking in just short sleeve jerseys. The decision on what to wear during the winter months is always a difficult one, especially in Southern California where the temps changes so much. Try this guideline the next time you bike. Obviously everyone is different, but it is a starting point on what to wear:
70 degrees: short sleeve jersey, short pants and short socks. 60 degrees: add a short sleeve windbreaker, long socks. 50 degrees: add arm warmers, long sleeve windbreaker. 40 degrees: add leg warmers, under shirt, wool socks, long fingered gloves. 30 degrees: add lined windbreaker, toe warmers, ear muffs. 20 degrees: stay at home and have some hot chocolate!