Since this rain has come through for the first time in like 2 months, what is it going to do to the fish?

Make them active and happy and then shut them down after the front moves through the area. 

I haven't ever made any correlation between rains, and cold fronts following or the quality of fishing.  Sometimes they come, sometimes they don't.  Same for the fishing after the rain.  I've clunkers, and banner days.  Must be a northern thing?

They'll probably get wet.

Ive had the experience of having great fishing right before a front but during it and after they pretty much shutoff. Im just wondering with the water levels being so low and now they are back to normal whats going to be the difference?

They'll probably get wetter.

fixed.