Most Daily Precipitation in Guam History

This is a list of the largest daily precipitation totals ever recorded in Guam history from 1945–2024.
What's the Most It Has Ever Rained in Guam?
According to NOAA records, the most rain that Guam has ever received in a single day is 19.7 inches which occurred on Sunday December 8, 2002.
Also see most rain in: 2 days | 1 week | 1 month
Guam Most Rain in One Day
Rank Precipitation Date
1 19.7 inches December 8, 2002
2 18.5 inches May 21, 1976
3 16.0 inches June 27, 2004
4 15.5 inches October 15, 1953
5 13.8 inches December 16, 1997
6 13.4 inches August 28, 1992
7 12.5 inches May 25, 2023
8 12.1 inches July 5, 2015
9 11.2 inches December 21, 1990
10 10.4 inches July 30, 2014
11 10.2 inches September 19, 2013
12 9.6 inches August 15, 2015
13 9.5 inches May 24, 2023
14 9.4 inches September 10, 2018
15 9.4 inches July 5, 2002
16 9.3 inches September 7, 1950
17 8.6 inches February 26, 1980
18 8.2 inches September 20, 2013
19 8.2 inches September 15, 2019
20 8.0 inches October 3, 1986