I honestly thought that my exhaust was louder when it was snowing a few months ago but I have proved it does change when its raining very heavy or snowing.

I know this post sounds very odd but the car actually has a vibrating sound from the exhaust during the above times. On a normal day it sounds 100% fine.

I originally thought that my antilock brake was locking up because it fealt like a rumbling/vibrating sound but as soon as I took it out of gear the noise went away.

.....only in bad weather do you hear this. Anybody have any idea?

 

its because the air is denser. I wrked for a blasting company for a short time and we wernt allowed to blast in the rain or when there was excessive clud cover due t the increase in noise.

 

Thats odd - the car never rattles/shakes from the exhaust sound unless its bad out. I know i said this but it feels like when your antilock brakes kick in and its vibrating.