Lathrop is a city located in San Joaquin County, California. The population is currently 17,429 in 2008 Lathrop’s current population is nearly 17,469 and is expected to reach 20,000 by 2012, with a projected “build out” population of 70,000 in next 25 years. Lathrop's average high temperature in January is 54 °F (12 °C) and the average low in January is 38 °F (3 °C). In July, the average high temperature is 94 °F (34 °C) and the average low in July is 61 °F (16 °C). The City of Lathrop is located in Northern San Joaquin Valley at the intersection of I-5 and 120 Freeways. Lathrop is centrally located within a 30-minute commute of Tracy, Manteca, Stockton, Lodi, Modesto, Livermore and Pleasanton.