I've been there the next day after rain and it's pretty dry, but that was mid-summer. This time of year, things dry a lot slower. Plus, there's few easier climbs at Oscar, depending on what your idea of "easy" is. Views aren't all that great either.
A hike up to Sugarloaf might be nicer. The view of Mt Wash is stellar and it gets sun all day. There are a couple 5.6s (at least 1 that I remember) and a nice bolted 5.7. Hike is a good warmup and you can rap into the climbs now that someone threw a 2 bolt anchor in (forgot which climb it serves, but it's down a gully-ish opening in the cliff once you get to the summit).