1. This translates to "What is the weather today?"
A possible response is "It is hot outside today." (Il fait chaud aujourd'hui)
2. Are you hot today?
Yes, I am hot today (Oui, je suis chaud aujourd'hui)
3. Why did you go to the pool today?
Because I wanted to go swimming (parce que j'ai voulu à nager)
Hopes this helps :)