Ours are closed Sunday and Monday, close at 6 on fri/sat, and open at 1pm on Tue. For me it's pretty hard to get to the library sometimes, but I suspect the hours work well for the people that need in-library time the most (school children, retired, and out of work). I'd prefer to pay the taxes for additional access, though. Nothing better than spending a rainy Sunday afternoon in the library (not that we hardly ever have one here in CA)
Here in downtown Reno they're 9am-5pm Mon-Thur and 10-5 on Sunday. That's basically post office style hours (ie when everyone's at work or in school) with the added bonus of being closed Friday and Saturday. That's pretty awful.