Western Regional Climate Center

PROVIDING CLIMATE SERVICES SINCE 1986

Standardized Precipitation Index

Select the SPI product (from the left column) and the time scale heading (from the top row.) Click on the intersecting box to display the product mapped for the U.S. Climate divisions. To obtain details for a climate division click on the desired climate division for any one of the U.S. maps.

Time Scale in Months
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation Available Available Available Available Available Available Available Available Available Available Available Available Available Available Available Available Available Available Available Available
Accum. Pcpn. dep. from Normal Available Available Available Available Available Available Available Available Available Available Available Available Available Available Available Available Available Available Available Available
Percentage of Average Available Available Available Available Available Available Available Available Available Available Available Available Available Available Available Available Available Available Available Available
Precipitation Percentile Available Available Available Available Available Available Available Available Available Available Available Available Available Available Available Available Available Available Available Available
Standardized Pcpn. Index Available Available Available Available Available Available Available Available Available Available Available Available Available Available Available Available Available Available Available Available

Available Product available. Not Available Product not available.

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