I'll actively seek it out. If it's raining at home (let's face it, in the UK it does a lot of raining) then I'll purposely sit in my car and just listen, or I'll find the nearest window and just relax.
I like it best when I am in a city, watching the way the light changes the mood and the sounds (especially if it's a storm) I just find it really relaxing. If I am in a city and a downpour starts, I'll try and nip into a cafe, grab a coffee and relax and just watch the rain.
I also have a must have rain app on my phone called 'rain rain'. Not only does it have a huge selection of rain and storm sounds, it also allows me to mix them together so that I can create the perfect storm in my AirPods ⛈ I love it and you can download it here it has 58k 4.8 ratings, it looks like it's also available on Android here
Listening to rain also helps with tinnitus (which I suffer from in my left ear), my wife and I have also mixed up a thunderstorm to listen to as we drift off to sleep, however it's not recommended to do that too often.
What sounds and experiences have a calming effect on you?