I think my two favourite sports - football first, American football second - are fine as is. However, this is rather because I prefer to dwell on the player's individual talents as opposed to how the game is played these days. Once I worked out how they were played I rarely gave changing their ways a second thought.
So instead, let me note 4 sports with something in common; baseball, cricket, tennis and golf. What's the similarity? Well, at the moment, if one drop of rain falls onto the playing field, they order everybody to go home immediately (unless they cheat by playing under a dome).
Seriously, what harm can some light precipitation do? If the playing field is affected, simply up your game in accordance to it. Sunny weather is massively overrated anyway. Too warm and it burns you. Sure rain can be mildly annoying if you're in it, but in sport it can shake up a game. And you won't be allowed to complain if 'it made us/me lose'. Because you couldn't stop it, could you? You should have done better when it arrived and you had the chance.