Being able to speak specific sentences is good, however, it is more important to be able to say a whole paragraph when talking about topics such as the weather. I'll have a specific lesson about putting sentences together in a future lesson. But I'll give one advice now. Basically, make about 10 sentences. After you know your ten sentences about this question, you can say all of them one after the other so it is a long answer. The ten sentences should be in a list format.
We will learn how to speak longer in a future lesson, but if you want to give it a try now, here are two examples.