Any decent low cost waterproof jacket and then a Schott waterproof overjacket of the top if you hit anything worse than a prolonged shower.
My Schott is lightweight , 100% waterproof , adds a layer of warmth / wind protection in the winter or when the days get cool and is coated on the inside with something that makes it incredibly easy to slip on .
I wear it over a Furygan jacket that cost £150 . Meanwhile my bulky, heavy Rukka jacket that admittedly never leaks (except for the pocket) hangs up all year round . It's not a Pro She'll so in wet weather it holds the water and becomes even heavier and stays wet for a long time. My Schott is dry soon after it stops raining