Joined: Jul 2002
Posts: 40,863
Likes: 3,115
From: Sacramento, California, USA
Bikes: Specialized Tarmac, Canyon Exceed, Specialized Transition, Ellsworth Roots, Ridley Excalibur
On dry days down into the 30s, I'd just wear my regular work clothes, a wool sweater, and full finger gloves. Perhaps an ear cover or beanie under the helmet if your head gets chilled.
If you want to go bike-specific: Get some toe warmers, arm warmers, knee warmers, and a windvest.