Do you need rain protection? If not, a windbreaker combined with layering lightweight layers above and shorts with leg warmers or light to medium weight tights below will do the trick.

If you have rain, a lightweight waterproof breathable layer in combination with light layers will work.

You shouldn't need insulated anything at those temps unless you ride in the rain and don't have a waterproof layer. Even then, you'd only want the insulation towards the bottom of that range.