Climate Zone 14: High Desert
Hot days, cold nights and cold winters at higher elevation.
Every Title 24 energy calculation uses the climate zone of the building’s physical location. In Zone 14, the climate is mixed, which shapes which building features have the most effect on compliance.
Typical project considerations
- Large daily temperature swings.
- Both heating and cooling equipment sizing matter.
General guidance only — requirements depend on building type, scope and the code edition in effect for your permit application.
Example communities
Palmdale · Lancaster · Victorville
Official references
Frequently asked questions
Where is California Climate Zone 14?
Climate Zone 14 (High Desert) covers areas such as Antelope Valley, high desert. Its representative weather city in CEC data is Palmdale. Boundaries don’t follow city limits, so confirm by address.
Does Climate Zone 14 change my Title 24 requirements?
Yes. All Energy Code calculations use the project’s climate zone, which affects prescriptive values such as insulation and window performance and how heating and cooling are weighted in performance modeling.
What report do I need?
Single-family projects use CF1R, low-rise multifamily uses LMCC and nonresidential projects use NRCC forms — regardless of climate zone.
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