rainfall

Từ điển Oxford Advanced Learner 8th

rain·fall [rainfall rainfalls] BrE [ˈreɪnfɔːl] NAmE [ˈreɪnfɔːl] noun uncountable, singular
the total amount of rain that falls in a particular area in a particular amount of time; an occasion when rain falls
•There has been below average rainfall this month.
•an average annual rainfall of 10 cm

Example Bank:
•The area has a high annual rainfall.
•There have been heavy rainfalls this month.
•We need a good rainfall to save the crops.
•We have an average annual rainfall of around 750 mm.