I remember playing games in rain... As a kid, we used to do football practices in any weather, including rain and snow. Baseball in rain, too...not so much snow...
Baseball isn't really that fun in rain, because normally good players can look silly with the ball slipping out of their hand, and they can get hurt slipping on wet grass.
On the other hand, football in rain is an absolute blast. The little, fast guys suddenly can't make their cuts without slipping and falling. Advantage goes to the slow, heavy folk whose cleats dig into the mud. Everybody gets filthy, which little boys love. Defenses love the rain because it means more fumbles and passes skipping off people's hands.
One of the few good plays I remember as a kid happened in a rain game. I dropped back to pass, then handed off a sneaky draw to my big, lumbering fullback. He rumbled forward while I pretended to be scanning the field for a target. Literally nobody on the defense even looked at the fullback until he was about thirty yards down field. I just watched as he receded into the distance. How the hell did that work so well?? I still don't know.
The door opened. A woman screamed. Someday, my mom would learn to knock.