I live in an area which is known for rain, but like a lot of things which everybody knows, that's half-accurate at best. We get fewer inches of rain per year than many places which aren't known as especially rainy. What we do get are a lot of days with some precipitation, so those fewer inches are spread out over a lot of time, resulting mostly in a lame drizzle. A lame drizzle is not what you want if you want to hear rain.
Sound-making gadgets have been around for a decade or more now. They can generally make a variety of sounds, but one that they all feature is rain. So, why didn't I just buy one? Well, I thought the sound would be pretty tinny and cheezy — they all have tiny speakers. I didn't think it would work when I knew very well that it wasn't actually raining. I thought a lot of things.
tenar10r and her husband got me one for Christmas after giving me a chance to try out theirs when I visited them in early December. It is, in a word, awesome. No, that little three-inch speaker is never going to reproduce the authority of rain drumming on the roof, but it does a very good job on the sound of rain through an open window, which is mostly high frequencies. And apparently I don't care if the rain is completely fake, it's just as soothing. And if I wake up in the middle of the night, I can just tag the button and get another hour of rain.
If you like the sound of rain, you owe it to yourself to check these things out. Your mileage may vary, of course, but they are also inexpensive these days.