Because you can't change it.
No matter how much you complain about it or lament it or hate it, there is absolutely nothing you can do to change how cold or snowy (or warm depending on where you are) it is outside.
But that doesn't mean you can't change something else.
The key to dealing with cold weather? Dress warmer. Plan more travel time. Make plans that don't revolve around being outside. You can't change the weather. You can change how you react to it.
And this is bigger than weather. A person is not defined by what happens to them. They are defined by how they act no matter what happens to them. The good things or bad things that happen to you in life make you no better or worse of a disciple of Christ. The circumstances around you have nothing to do with your faith. You have no control over those things. All you can control: your actions. And that shows who you are. The situation does not make the hero. The actions done in the moment make the hero.
So stop complaining about things you can't control, like the weather. Instead, do something about it. It's what makes you a better person.