What to Expect

[JohnT]

Dirt will get blown in by the wind and you may get a little extra water. Mostly what happens is you stay inside and don't take care of it, so it gets a little ahead of you.

[iwannapool]

So a sudden in flux of cold water, rain, won't throw my numbers out of whack?

[CarlD]

So a sudden in flux of cold water, rain, won't throw my numbers out of whack?

Who knows? Most likely, pH will drop, especially if your area has slightly acid rain. Cold water will only throw your temperature out of whack.

You may see some dilution if you have to drain off water. This can lower CYA, T/A, Calcium, and, of course, Chlorine.

Rain happens. Its debris that's more the problem.

[NWMNMom]

If you know its coming, keep that cover or solar blanket on to help avoid the tree and other debris that pollutes the pool. That is the biggest problem weather events bring (other than the obvious wind or tornado damage, etc.) The rest is just minor chemical adjustments.