This is a regular verb. It follows the conjugation pattern of the verb comer.
This verb is mostly used in the third person singular, as it describes weather (e.g., chove).
Present:
Chove muito aqui.
It rains a lot here.
Imperfect:
Chovia o dia todo.
It was raining all day.
Future:
Choverá amanhã.
It will rain tomorrow.