Temperature
The warmest month in Oxnard - Ventura County, Oxnard, California is September with an average high temperature of 74.4°F. The hottest day on record was September 23 1944 when the temperature hit 104.4°F. During December the overnight temperature drops to an average of 45.8°F with the lowest temperature of 25.3°F being recorded on January 14 1963.