I rode today in 39f, only a 30 minute commute though.
I wear bib shorts, tights (water repellent ones), short sleeve shirt, long sleeve jersey and a bright yellow jacket. I also wear some motorcycle gloves that are toasty.
I often have to unzip the jacket after about 15 minutes as it gets too hot.
It's only really my face that ever gets cold, especially my ears, I have some ear muffs but am looking to get one of those bands that covers your forehead and ears.