if you want to know what describes weather, you have to think about it and eliminate the one that are obviously not correct.
So, gravity is obviously wrong.
Temperature is definatly one because you need temperature to calculate how cold/hot it is. Air pressure and clouds are the ones im not sure about. Clouds dont really describe weather but they could if you say cloudy. I think air pressure is needed to find out how strong the wind is but im not sure
Hope I helped a bit