Originally Posted by
freeranger
It can't hurt, and it will provide peace of mind. Re-lube.
Yes, relubing would never be a bad thing, but to answer your original question: It depends on what lube you are using. Some lubes don't tolerate rainy rides very well, while some are very good. I can usually tell by sound when my chain needs lube. Any hint of noise above the normal smooth hum does it.