Rain's effect upon different sports.

As long as there is no lightning, some sports can be played in rain, others cannot. Baseball just does not work too well when the ball sticks in a muddy infield, so it has to be played, for the most part, in the dry. Football is different. Some teams actually do better on a muddy field. Rugby is a famously muddy sport. Tennis does not work well at all in the rain, because if there is no footing, it is virtually impossible to play. Different sports - different criteria.