How do you translate It is stormy in French?

There are a few ways to translate "It is stormy" in French, depending on the level of formality and specificity you want:

Formal:

* Il fait un temps orageux. (This is the most literal and formal translation.)

Informal:

* Il y a de l'orage. (This is a more common and less formal way to say it.)

* Il fait mauvais temps. (This means "it's bad weather" and is a general way to say it's stormy.)

More specific:

* Il y a un gros orage. (This means "There is a big storm.")

* Il tonne et il éclaire. (This means "It's thundering and lightning.")

The best translation depends on the context of your sentence.