Should i be worried about condensation?

So i recently built my computer, so i am still very much so babying it =p  I have my desk right next to a window. With my PC on the top of the desk right next to the window. So i am wondering if its a problem to keep the window open?

Thanks - Andrew

condensation...sation...sation...sation.....sation. sorry I just had to do that, do you live somewhere rainy?