Oxnard Climate Zone & Energy Code

Climate Zone: CEC Climate Zone 6 (coastal Ventura County). IECC Climate Zone 3B. Oxnard's Pacific coastal position produces mild, marine-dominated conditions — 83°F cooling design and 36°F heating design. Coastal fog and onshore breezes are dominant, making Oxnard one of the coolest residential markets in Southern California.

Energy Code & Manual J Requirement: California Title 24 Part 6 (2025 edition, effective January 1, 2026). ACCA Manual J required for residential HVAC sizing. All Oxnard and Ventura County jurisdictions enforce Title 24. Ventura County cities are progressively adopting reach codes for electrification.

Local Electric Utility: Southern California Edison (SCE)

Building Department: City of Oxnard Building & Engineering Department

Local Trade Association: ACCA California