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Precipitation Monthly Means
The monthly average precipitation maps are generated using the Parameter-elevation Regressions on Independent Slopes Model (PRISM). The values represent measurements of precipitation which have not been adjusted for deficiencies in the gage catch process.
Click on maps to get larger detailed map
The monthly average precipitation maps are generated using the Parameter-elevation Regressions on Independent Slopes Model (PRISM). The values represent measurements of precipitation which have not been adjusted for deficiencies in the gage catch process.
Click on maps to get larger detailed map
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| US Dept of Commerce National Oceanic and Atmospheric Administration National Weather Service Northwest River Forecast Center (NWRFC) 5241 NE 122nd Avenue Portland, Oregon 97230-1089 Telephone: 503-326-7401 Last Modified: December 9, 2005 | Disclaimer Information Quality Credits Glossary Search | Privacy Policy Freedom of Information Act About Us Career Opportunities |