Average annual precipitation | Guam – yearly data, chart and table

The average annual precipitation in Guam in 2024 amounted to 2 570.14 mm, which is 16.58% less than in 2023, when it was  3 080.92 mm. This is the first year of decline after a period of growth. The minimum annual precipitation level was recorded in 1998, with a value of 1 376.89 mm. The maximum figure of Guam was in 1963, when it reached 3 250.40  mm. Data are provided by the Climate Change Knowledge Portal (CCKP), a project of the World Bank Group.