3 points
I got caught in a rainstorm in one once. Definitely did not keep me or my stuff dry, the tarp blocks the rain from the top, but you get wet air blowing in from every other direction, and a little bit of spray comes in both ends.
2 points
Rain is one thing, a rainstorm is another.
I’ve been caught in the rain and I was fine. I read online that you can get a rain fly that folds around the edges and closes up the ends and keeps out spray and such.
I imagine in a rainstorm you’d be pretty miserable in a tent too, depending on where you were in relation to running ground water 🤷♂️