it depends on the priest and on his assignment
the typical pastor of a parish in this diocese also has another responsibility or even fulltime job–seminary rector, vicar general, chancellor, head of chaplains, vicar for priests, vicar for religious, communications director etc. are all priest who also have parishes, plus they may be deans (head of a group of parishes organized geographically), hospital or prison chaplains (we have almost as many HS age youth in custody as we do in school here for instance), chaplains for other groups.
Our pastor spends at least 2 full days on diocesan work, plus a communications apostolate assignment involving TV, radio and written newsletters. He also writes books and magazine articles. Daily mass, funerals, weddings, baptisms, we do have a retired deacon who helps when he can. At least half the pastors here also manage 2 to 5 missions and all the pastoral and sacramental needs of those areas. It is not unusual for a priest here to put 50 to 75M miles on a car each year, so a lot of time driving. Our priest listens to instructional or devotional CDs on religious topics when he drives, others conduct business with hands free phone or blackberry or whatever it is called while they drive.
It is common here for all the priests in a given city to rotate sick calls to homes, hospitals, nursing homes etc, so each is on call at least 1-2 days a week.
Ours is one of the best preachers I have ever heard and spends 8 hours preparing his weekend homily. he also offers confession more often than many parishes. He tries to visit each CCD class at least once a year–that means 48 visits, 2 a week during CCD time. There are very few priests here to take over if one is sick so they often have to share duties in a neighboring parish if a pastor gets sick–there are very few parishes with more than one priest.
Several priests her also give retreats, teach classes, help with campus and youth ministry events and help with every lay group you can think of. A pastor running a capital campaign in addition to the business administration of the parish and sometimes the school, has those business affairs to manage.
If you ask most priests they will tell you they spend 2 much time in meetings. If ours went to every one he is invited to that would easily be 3 a night or 15 a week.