Weather: with cool temperatures and a steady drizzle, with a moderate breeze.
You wake to find the day is not particular pleasant. You walk yourselves across town, taking note that Arnsberg appears to run some distance along a valley with a small stream (not large enough to appear on the map on your right), with low hills on either side. The castle would be on the east hill, and the Arsbergerwald upon the far side of said hill. You thus walk up the valley, circle around the edge of town and come to a large pasture ... the "backyard" that Thomas the groom spoke of.
You can see a brook running through the edge of the pasture, along the inside of the fence upon which you're standing on, and a stone wall on the other side, running up the hill from the bottomland to where it meets the castle, about 300 feet above you. The pic is a bit dim.