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
From coastal Georgia through the Mid-Atlantic states, the Hurricane Center says rainfall could cause flash, urban ,and river flooding.
—
Center Square, The Washington Examiner, 27 Sep. 2025
The disturbance is expected to produce the following storm total rainfall amounts through Monday morning.
—Miami Herald Hurricane Bot, Miami Herald, 27 Sep. 2025
During heavy rainfall, there is a risk of flooding, especially in low-lying and flood-prone areas.
—Ca Weather Bot, Sacbee.com, 27 Sep. 2025
In Arizona, this often happens when monsoon storms or heavy upstream rainfall could send sudden surges of water through washes, canyons or urban areas.
—Hayleigh Evans, AZCentral.com, 27 Sep. 2025
See All Example Sentences for rainfall
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Center Square, The Washington Examiner, 27 Sep. 2025
The disturbance is expected to produce the following storm total rainfall amounts through Monday morning.
—Miami Herald Hurricane Bot, Miami Herald, 27 Sep. 2025
During heavy rainfall, there is a risk of flooding, especially in low-lying and flood-prone areas.
—Ca Weather Bot, Sacbee.com, 27 Sep. 2025
In Arizona, this often happens when monsoon storms or heavy upstream rainfall could send sudden surges of water through washes, canyons or urban areas.
—Hayleigh Evans, AZCentral.com, 27 Sep. 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 29 Sep. 2025.
Copy CitationKids Definition
rainfall
noun
rain·fall
-ˌfȯl 
1
: a fall of rain
2
: amount of precipitation
an annual rainfall of 20 inches
Love words? Need even more definitions?
Merriam-Webster unabridged
Share