Lose brakes when it rains.

I've been noticing that, for a little while. Actually I can brake, but it takes a noticeable amount of pressure and distance for the car to come to a complete stop. It's really weird since on dry days the brakes are as responsive as one normally expects. Though it's been two years since I needed a break job, I had my brakes checked six or seven months ago and the mechanic told me the brakes look fine... "there's enough meat in them," he said. Brake fluid is fine, no leaks, and the brake reservoir is full. Any suggestions?

The most common reason for an increase in braking distance in wet weather is that the rotors and pads can become wet. When this occurs, the brakes need to dry themselves before the friction will begin stopping the car. Once dried, they will usually stay that way unless you go through a deep puddle at speed in which case you get them wet again. Tires also play a role in this in the fact that if there isn't much tred left, they won't grip the road as well and can increase braking distance as well as the possiblitly of sliding.

Look at your back wheels, behind them for wheel cylinder leakage. The rear brakes are very well known to leak brake fluid at the wheel cylinders. They usually make noise, but not always. Anyway the brakes may work when dry, but water and brake fluid make an extremely slick combo.