"What book are you reading?"
C'est quel mois means 'what month is it?'
It can mean - which man? or what a man!
you say it like this. quel livre avez-vous acheté?
Quel temps mean 'what weather'. Usually Quel Temps is used in a sentence such as 'Quel temps fait-il' or 'Quel temps il fait'.
"What month do you prefer?"
Quel temps fera-t-il means "what will the weather be?" in French.
What age are youHow old are you?/What is your age?
Do you mean in English? At what age will he be an adult?
Quel est mon mot de passe means "What is my password".
Quel chapeau? in French is "Which hat?" in English.
"Quel" and "quelle" are used in French to ask "which" or "what" in relation to masculine and feminine nouns respectively. For example, "Quel livre lis-tu ?" (Which book are you reading?) and "Quelle date est-il aujourd'hui ?" (What's the date today?)
il a quel âge means "how old is he?" in English.