It's been really overcast and gloomy where I am, even rained a lot a few days ago, and I don't remember anyone bringing this up around here before, so here we are talking about video game levels where it rains.
To count it doesn't have to be constantly raining, as long as it rains for much of the level or you can do something that triggers rain in the level.
My personal favorite rainy levels.
Ropey Rampage (Donkey Kong Country)
Topsail Trouble (Donkey Kong Country 2)
Cloud Man's stage (Mega Man 7)
Chicago (Perfect Dark)
Disposal Center Raid (Mega Man Zero)
Neo Bowser City (Mario Kart 7)
Toad Man's stage (Toad Man)
New Donk City Pre-Mecha Wiggler Fight (Super Mario Odyssey)
Those are the ones I could think of off the bat, mostly because they're ones I've already played myself. What are your favorite levels where it rains?