Last Century, as a Motorcycle Patrol Officer, I had to ride in the rain, some years it never seemed to stop raining.
I will tell you without a doubt. Most "Rain Gear" might keep the rain off of you, but the sweat that condenses inside the "Gear" is worse.
For my rides to and from the station garage I would wear a "HondaLine touring Suit".
With a generous application and reapplication of "ScotchGuard" the suit was quite comfortable, breathable,(no sweat condensation) and warm. I wore two of the suits out completely. In 1973 they cost about a hundred bucks. I would give five hundred for one of those suits if I could find one now.
Bob