Around 30psi front and rear...
I over-inflate to 32lbs in,... and by the time I check it again (infrequently)... it's usually in the low 20's...
It ain't that critical... (a couple lbs lower is nice for potholed roads,... it might hurt your mpg's a tiny bit)... (it can also affect tire wear,.. but bikes only wear out the center patch anyway, so tire deformation don't matter that much)...
JMHO...
...
Anywhere from 28psi to 34psi, ballpark.... whatever feels good to you...