Housing Inventory: Median Days on Market in San Diego County, CA was 39.00000 Level in May of 2026, according to the United States Federal Reserve. Historically, Housing Inventory: Median Days on Market in San Diego County, CA reached a record high of 58.00000 in December of 2019 and a record low of 22.00000 in May of 2022. Trading Economics provides the current actual value, an historical data chart and related indicators for Housing Inventory: Median Days on Market in San Diego County, CA - last updated from the United States Federal Reserve on June of 2026.