If you open a food truck, you do it knowing that on rainy days people aren’t going to want to stand in line at your food truck. It’s part of the deal.
It doesn’t do a lot of good to start an advertising campaign trying to convince people that water on your clothes isn’t a big deal and you’ll dry off pretty quickly and if nothing else it’s easy to just pack an extra set of clothes in your car.
All of that is true but it is not useful.
Rainy days are bad for standing in lines outdoors. And standing in lines outdoors are what food trucks rely on for revenue (and for marketing).
More importantly, the rain will end and the sun will come out again…what are you going to do on the sunny days?