California DUI Laws, Penalties and Sentencing Type of California DUI Jail/Prison Sentence DUI School 1st offense misdemeanor DUI Up to 6 months in county jail 3 or 9 months 2nd offense misdemeanor DUI 96 hours to 1 year in county jail SB 38 18 or 30 months 3rd offense misdemeanor DUI 120 days to 1 year in county jail 30 months 3 more rows • Aug 21, 2021