My pittie's been really hard to housebreak.

The problem? She's horribly, MAJORLY whimpy when it comes to going outside in yucky weather. We had a fairly mild winter considering, but when the temps dropped and there was the slightest dusting on the ground, she'd run out, then look back at me like, "you're kidding...right?" and run back to the door. Same with even the lightest rainfall. Big tough pibble. LOL. We just keep her close when she refuses to go outside, so she can't sneak away and potty.