abs light on when it rains

[cjay1487]

my abs light comes on when it rains what could the problem be?

[Hymie]

Some (higher spec) cars have an electrical connection at each wheel brake assembly – the purpose of which is to give a warning that the brake pads require replacing. It could be that your brake pads are close to this wear point, where the electrical connection would be made – but requires moisture (rain) to pass sufficient current to activate the warning.

Given the importance of the vehicle braking system – get it checked out, sooner rather than later.

[chas2008]

ABS sensors are located at the wheels so are open to the elements, could be corrosion damp ingress...as said should be checked out
Had your pads /discs changed recently ? this can disturb the sensor