I've had rain issues before too - right now its working properly My assumption is that its all based on whether the game decides if its raining or not upon reload. - The rain initializes... afer? the house has been initialized?
I dunno. See. It's lightly sprinkling/raining right now, right right now, in my game - it wasn't raining when I started this session/reload
As soon as I stepped on my house's platform, the rain ceased being visible - Like I couldn't even see any droplets off out at the edge of yard, making me think it'd stopped raining just as I was testing it.
There was a brief delay as I walked off the platform, but then I could see rain again.
I think when you reload, and I dunno if it remembers raining trigger or if it rolls every time it reloads and every other random time that it occurs....
but I think if when you reload - it was raining during reload - it'll break through the house
I don't know if it'll stay until the next save and reload (potentially when no rain)
or if maybe changing to the cave would solve the issue - as the house-platform is supposed to trigger a cease, apparently.