Not the best idea for it and it will probably fail years earier than normal, but it will work as long as no rain/snow hits it. It's like leaving a bike outside, it will be solid for a while, but then you'll see rust, humidity and temperature changes will move components around. I'd get a laptop and bring it out when you want to use it, unless you don't plan on the PC being reliable past a year or so.
Thank You! I will have to wait, I donot think I can use a wireless lap top with my service yet. I donot have high speed internet service.