Keeping your beard covered in bad weather will mean more sweat and grit in your beard. You’re going to have to wash it.
Shampoo cuts through oil. Oil is what keeps hair soft and luxurious. Shampooing is the reason people use hair conditioner. You shampoo to clean your facial hair, and then you use conditioner because shampooing made your hair dry.
Your beard deserves better treatment than that. Purchase a mild beard cleanser that won’t strip your facial hair dry. Use beard oil regularly.
Protect your beard from harsh weather and harsh soaps to enjoy an epic beard that radiates masculinity.