Rainfall Atlas of Hawaii

The Rainfall Atlas of Hawaii is a set of interactive maps showing the spatial patterns of rainfall for the major Hawaiian islands. The Atlas represents estimated monthly and annual rainfall averaged over 30 years (1978-2007). Users can zoom in on areas of interest and click on a particular location to view charts and tables of rainfall statistics.

The Atlas also enables users to understand where in the state average rainfall estimates are more and less certain. A map of uncertainty corresponds to every map of mean rainfall. Uncertainty is highest in remote locations, far from the nearest location of a rain gauge.

The Rainfall Atlas of Hawaii is produced by the Geography Department at the University of Hawai‘i at Mānoa.

Snapshot of the Rainfall Atlas of Hawaii, showing the pattern of mean annual rainfall across the main Hawaiian Islands.