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
The thunderstorms could also bring excessive rainfall in northern Arkansas, southern Missouri and southern Illinois, bringing a risk of flash flooding, the weather service said.
—
Jeanine Santucci, USA Today, 18 Oct. 2025
New rainfall amounts between three quarters and one inch possible.
—Matt Audilet, MSNBC Newsweek, 18 Oct. 2025
Sunny, warm days, cool nights, and consistent rainfall make for the best fall color displays, Schneider wrote.
—Jim Higgins, jsonline.com, 17 Oct. 2025
However, some of these areas may experience excessive rainfall at an accelerated rate, which could lead to instances of flash flooding.
—Kenton Gewecke, ABC News, 17 Oct. 2025
See All Example Sentences for rainfall
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Jeanine Santucci, USA Today, 18 Oct. 2025
New rainfall amounts between three quarters and one inch possible.
—Matt Audilet, MSNBC Newsweek, 18 Oct. 2025
Sunny, warm days, cool nights, and consistent rainfall make for the best fall color displays, Schneider wrote.
—Jim Higgins, jsonline.com, 17 Oct. 2025
However, some of these areas may experience excessive rainfall at an accelerated rate, which could lead to instances of flash flooding.
—Kenton Gewecke, ABC News, 17 Oct. 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 19 Oct. 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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