rain·​fall | \ˈrān-ˌfȯl \

Definition of rainfall 

1 : the amount of precipitation usually measured by the depth in inches

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Examples of rainfall in a Sentence

This area has an average annual rainfall of 12 inches. an increase in annual rainfall

Recent Examples on the Web

The disastrously heavy rainfall caused damage over a widespread area, with most of the deaths in and around Hiroshima. Fox News, "Thousands still in shelters after deadly flooding in Japan," 13 July 2018 Although the entire southeast Texas region could experience heavy rainfall, the threat is highest between Houston and Lake Charles. Samantha Ketterer, Houston Chronicle, "Heavy rainfall forecast in SE Texas on Independence Day," 2 July 2018 Though the cloudy skies could bring quick downpours in isolated areas, rainfall totals are only expected to be in the 1- to 3-inch range - though some spots could see up to 6 inches. Keri Blakinger, Houston Chronicle, "Flash flood warnings in place as soggy 4th of July forecast set to rain on parades across SE Texas," 4 July 2018 Forecasters initially predicted rainfall totals for Houston would only be in the range of 1 to 3 inches. Jacob Beltran, San Antonio Express-News, "July Fourth storm sweeps through San Antonio, swamps Houston," 4 July 2018 Forecasters are calling for rainfall totals between a quarter and half an inch. OrlandoSentinel.com, "Weather: Scorching temperatures could make way for rain this afternoon," 26 June 2018 Tuesday's storms may slow this process, but in general, rainfall totals are not expected to be as great as last week's deluge. Tom Skilling, chicagotribune.com, "Pleasant Monday belies impending storm threat," 25 June 2018 Some impressive rainfall totals across our area from last night's heavy rain and flash flooding event. Philly.com, "Downpours flood region, close I-76 into Philadelphia," 11 June 2018 About half an inch of rain fell Saturday in the Baltimore area, and Ellicott City saw similar rainfall totals, National Weather Service meteorologist Kyle Pallozzi said. baltimoresun.com, "Maryland weather: Flood watch in effect for entire region Sunday," 3 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'rainfall.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of rainfall

1817, in the meaning defined at sense 1

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Statistics for rainfall

Last Updated

5 Nov 2018

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Time Traveler for rainfall

The first known use of rainfall was in 1817

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English Language Learners Definition of rainfall

: the amount of rain that falls on a particular area


rain·​fall | \ˈrān-ˌfȯl \

Kids Definition of rainfall

2 : amount of precipitation Their average annual rainfall is 80 centimeters.

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Comments on rainfall

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