1
: the amount of precipitation usually measured by the depth in inches
2
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
In April 2025, Oklahoma City received 12.55 inches of rainfall in total.
—
Jeanine Santucci, USA Today, 2 May 2025
In the last week, this area has seen 800% of its normal rainfall for this time of year -- so adding more rain on top of that will easily spark flash flooding.
—Kenton Gewecke, ABC News, 30 Apr. 2025
During periods of intense rainfall, the risk of flooding increases, particularly in low-lying and flood-prone areas.
—Nc Weather Bot, Charlotte Observer, 30 Apr. 2025
The heaviest rainfall will occur in central and northeastern Oklahoma.
—Anna Skinner, MSNBC Newsweek, 30 Apr. 2025
See All Example Sentences for rainfall
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Jeanine Santucci, USA Today, 2 May 2025
In the last week, this area has seen 800% of its normal rainfall for this time of year -- so adding more rain on top of that will easily spark flash flooding.
—Kenton Gewecke, ABC News, 30 Apr. 2025
During periods of intense rainfall, the risk of flooding increases, particularly in low-lying and flood-prone areas.
—Nc Weather Bot, Charlotte Observer, 30 Apr. 2025
The heaviest rainfall will occur in central and northeastern Oklahoma.
—Anna Skinner, MSNBC Newsweek, 30 Apr. 2025
See All Example Sentences for rainfall
Cite this Entry
“Rainfall.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/rainfall. Accessed 10 May. 2025.
Copy CitationKids Definition
rainfall
noun
rain·fall
-ˌfȯl 
1
: a fall of rain
2
: amount of precipitation
an annual rainfall of 20 inches
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