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.
Pretty respectable hours if you ask me.