Standardized Precipitation Index Page

SPI Information: What is the SPI?

Latest SPI maps: Updated Dec 31, 1969 for data through
Note: SPI zone definitions for each map are based roughly on climatological differences. Most zones are represented by a relatively small number of gages so oversimplifications of actual conditions will occur.
Kaua'i: 3-month | 6-month | 12-month
O'ahu: 3-month | 6-month | 12-month
Maui: 3-month | 6-month | 12-month
Big Island: 3-month | 6-month | 12-month

SPI Data tables
"Quick-look" data set: Updated Dec 31, 1969 for data through the end of
Full data set: Updated Dec 31, 1969 for
Micronesia and Samoa data set: Updated Dec 31, 1969 for data through the end of

SPI Rain Gage Locator Maps
Kaua'i | O'ahu | Maui | Big Island