No Brakes in Rainy Weather

I searched the FAQ for my problem with no results.
My brake pedal is normally low (1 1/2 inch of floor when brakes applied). The other day was damp with light rain. My brake pedal went to the floor with minimal braking. Pumping didn't help. Brake fluid is OK. Now the weather is sunny and the brakes work as they always do.
What happened ??

Welcome to AF.
Any brake or ABS lights on when it does it?
MT

Thanks 4 the reply..

No !! No lights. No nothing out of ordinary.

You may have it tested when it does it with a ABS capable scanner..
And test for stored abs codes before turning the engine off.
Good Luck
MT

Thanks. It rained again last week and the brakes were OK.
It must have been a fluke.

Thanks. It rained again last week and the brakes were OK.
It must have been a fluke.

You are welcome.
ABS Acting up in damp or rain is usually the a wheel speed sensor or wiring getting wet and shorting out.
Good Luck
MT