I also like susan's suggestions. Dppending on what garments you alrady own, the answer is clearly layer layer layer.

For gloves, I have ibex wool liners I wear under my short finger reg. cycling gloves, and then have a thin windstopper glove I can layer over, to have lots of combinations. Maybe all 3 to start, and peel as you go.

I also love jackets with zip off sleeves, but i agree with Veronica that if its never going above 60 I'd wear full tights and just mess with taking toe covers off as it warms up. My PI vagabound jacket wouldn't be warm enough for 27, so maybe I'd put a thermal vest under it that I could take off later.