Not just humidity, but dust, dirt, and bugs can get inside your tv.

Better to get a TV made for outdoor use. Sunbrite makes a good one.

Here is a link that might be useful: Sunbrite

I'm also assuming that you have no concerns about someone making off with this?

Kudzu9 - no concerns.

My neighbor has an LCD mounted on his patio. It's not a screened-in area ... and the TV is toward the outside perimeter (although a couple/three feet or so in from the roofline). Standard-issue model of some ilk from Wal-Mart, I think. Being near the TX coast, there's plenty humidity. Two years, maybe 3, it hasn't yet failed

Thanks dadoes. I was hoping to hear that.

good thought,

apart from the humidity , u should also take care about the dirt gong into the TV as the dirt plays a spoil sport too.

Their effects are worse, but u don't have to worry a lot as they harm in a very long time , by that time u will change ur TV. lol