Halloween // I want to make direction signs with creepy places on them, what material should I use.

As the title says. I want to make direction signs with 3 or 5 creepy destinations on them. My plan is to place them outside. They will have to survive rain or snow.

I’m clueless about what materials to use. The paint, the finishing layer, the material of the signs.

Plan B is to make them on cardboard and place them to be seen in the window but I’d rather make a ‘real’ one for outside.

Can anyone share their knowledge with me?