The Moon *does* have a magnetic field, but you're right, it's not dipolar since it lacks a spinning, molten core to act as a dynamo. So there is no magnetic north or south pole on the Moon.
However, the Moon does have an axis on which it rotates*, and so has geographical poles, despite its lack of magnetic ones
(Earth has a rotational axis too, of course. The Earth's geographic north and south poles are located in a slightly different place than our magnetic north and south poles. They're separate things.)
We humans like to map stuff, so we've chosen to map one rotational pole as north and one as south. The north one is the one that points in the same direction as our north pole. (Which is defined as the pole you'd see if you were looking down upon the Earth and Moon from Polaris.)
*The Moon is tidally locked to Earth, so one side always faces us, but it still rotates on its axis as it revolves around the Earth.
(
http://en.wikipedia.org/wiki/Near_side_of_the_Moon shows sunlight moving from east to west across the lunar surface)