I was cycling once and a solid spring shower came up on me while I was at least a few miles away from my car. So I just kept at it, and it was one of the most memorable of my then daily bike rides. It was thrilling, working out hard with the cold rain falling on me was invigorating, my physical senses were going all over between working out and all the rain hitting me as I was cycling fairly fast through it. Definitely worth being out in a rainstorm sometime and just surrender to the fact you'll get soaked, so you can then just enjoy the moments.