It was in the mid 50s this weekend up in Door County, but we still did a family ride through Peninsula State Park. (sort of a tradition that pre dates my son's birth). Anyhow, I was unprepared for the cold, and should have packed a base layer, leg warmers, and a windbreaker, along with my long sleeve jersey. I bought a pair of cycling tights on sale at the LBS in Fish Creek and wore them over my cycling shorts. It wasn't optimal, but I survived.