1 2-month change in SoCal CPI Month 2008 2009 Jan. 3.9% -0.1% Feb. 3.1% 0.0% March 3.3% -1.0% April 3.1% -1.3% May 3.7% -1.8% June 5.4% -2.2% July 5.7% Aug. 5.1% Sept. 4.5% Oct. 3.4% Nov. 1.0% Dec. 0.1% Consumer prices in Southern California dropped 2.2% from June 2008 to June 2009, the largest annualized drop since February 1950, reports the U.S. Bureau of Labor Statistics.