"It'll rain" is an English equivalent of the French phrase Il pleuvra. The masculine singular pronoun and third person singular future indicative translate literally into English as "It will rain." The pronunciation will be "eel pluh-vra" in French.
Il in French is "he" in English.
A-t-il? in French is "Has he?" in English.
Quand il... in French means "When he..." in English.
Il porte in French means "He wears" in English.
"Is there?" in English is Y a-t-il? in French.
Est-il moche? in French is "Is he ugly?" in English.
Comment est-il? in French means "How is he/it?" in English.
Il fait froid in French is "It is cold" in English.
Il va in French means "He (it, one) goes" in English.
"How do you spell it?" in English is Comment s'ecrit-il?in French.
"Today, it was..." in English is Aujourd'hui, il a été... . in French.
"il fait sombre" means "it's dark" when translated from French to English