California Monthly
Regional Precipitation
 July 1895 through June 2024

STATEWIDE

HYDROLOGIC REGION
- North Coast
- Sacramento
- North Lahontan
- SF Bay Area
- San Joaquin River
- Central Coast
- Tulare Lake
- South Lahonatan
- South Coast
- Colorado River

SIERRA NEVADA PRECIPITATION INDICES
- North Sierra (8SI)
- Central Sierra (5SI)
- Southern Sierra (6SI)

Source: http://www.wrcc.dri.edu/ and https://water.ca.gov/

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