Tomorrow is May 1.
My grandmother always said that if you get wet in the first rain of May, you'll be healthy all year.
I do what my grandmother said.
You might want to try it.
Rain's predicted for tomorrow around here. If you're out west, you may have to wait. If it doesn't rain where you are in May, I don't know what to tell you.
I interpret 'wet' rather liberally.
(But then I would, wouldn't I?)
One raindrop will suffice -- but actually standing in the rain for a bit is more fun.