It's been awhile since it rained in my village and I guess it's a random event, right? No making it rain like in The Secret City?

Hi Jami, you're absolutely correct - rain is a randomly occurring event on your island, like the appearance of mini-typhoons or volcanic cracks. It does rain often, though, so keep checking your game and it will happen!

Yeah, it rained about five minutes after I posted this. I just needed pond water.