Heavy Rain in Guam

5 heavy rain events since 1997

Every heavy rain event the National Weather Service has filed in Guam, year by year, with the most significant episodes. Rainfall totals unusual for the place and season that did not produce a flood.

The most significant on the map

The most significant heavy rain episodes in Guam.

Tornadoes
Tropical storms and surge
Floods
Wind
Hail
Winter weather
Heat and drought
Cold
Fire, smoke and dust
Marine and coastal
Other

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The record

Events: 5
Deaths: 20
Injuries: 8
Damage: $2.0 million

Every year

The most significant

Ranked by deaths, injuries, damage and size together.

Hurricane and Heavy Rain in Guam, April 11 to 19, 199719 deaths · 8 injured · $3.0 million · 3 eventsTyphoon Isa (02W) was within the Guam Area of Responsibility from the 9th until the 21st. It was first reported as a tropical disturbance on the 9th. It became a tropical storm on the 12th. On the 12th it was near Pohnpei. Peak wind gust observed across the island were 60 mph.
Heavy Rain in Guam, August 10, 20141 death · 1 eventThunderstorms associated with heavy rain caused a drowning during the |afternoon of August 10th.
Heavy Rain in Guam, October 4, 2003$20,000 · 1 eventHeavy rain was reported across Saipan during the morning.This resulted in flooding of the NMI Museum. The interior was floodedwith mud and water. There was no damage to important artifacts.
Heavy Rain in Guam, April 29 to 30, 20051 eventA strong and persistent trade-wind disturbance brought heavy rain to Pohnpei, totaling 8.81 inches at the airport in the 24 hours ending at 1600 SST on April 30th. There was one indirect fatality when a man in his early 40s was killed by a falling tree during the heavy rain.
Heavy Rain in Guam, August 7, 2012$10,000 · 1 eventHeavy thunderstorms developed over central and northern Guam the evening of Tuesday 7 August, dropping up to 5 inches of rain and producing widespread flooding. Rainfall reports included 4.73 inches at Guam International Airport and 4.82 inches at Sinajana.

Heavy Rain everywhere Every kind of event in Guam

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24.