I am wondering if the rain has any effect on the game or is it just atmosphere. I like the rain, I like the sound of the rain, I like when the sun comes out after the rain. It just seems to me that the map I am currently playing has more rain. The weather is fair rather than mild if that makes any difference. I always play at speed 1x so it's not that it just seems to rain longer. Maybe I just didn't pay as much attention to it before. Too bad there isn't distance sound of a fog horn near the dock, guess that wouldn't fit the time frame of the game.
I don't think rain has any effect on the gameplay. I like it too as atmosphere. I mean to have noticed, that when you play the North, there are some different "wheather sounds" . So I guess, that your horn would be possible to make.