Short answer: California Climate Zone 14 covers the high desert. The California Energy Commission assigns 89 ZIP codes to it, across 63 places including Lancaster, Palmdale, Victorville, Apple Valley and Barstow. Use the table below or the ZIP code lookup to confirm a project's zone.
Title 24 climate zones are assigned by the California Energy Commission (CEC) by ZIP code, not by city limits. That is why a large city can appear in more than one zone.
Climate Zone 14 ZIP Codes by City
Source: the CEC's Building Climate Zones by ZIP Code table. Place names come from postal data and can differ from city limits. Your report always uses the zone for your project's exact address.
| City or place | ZIP codes in Zone 14 | Also in |
|---|---|---|
| Acton | 93510 | — |
| Adelanto | 92301 | — |
| Apple Valley | 92307, 92308 | — |
| Baker | 92309 | — |
| Barstow | 92311, 92312 | — |
| Boron | 93516, 93596 | — |
| Boulevard | 91905 | — |
| California City | 93504, 93505 | — |
| Campo | 91906 | — |
| Cantil | 93519 | — |
| Cima | 92323 | — |
| Daggett | 92327 | — |
| Death Valley | 92328 | — |
| Descanso | 91916 | — |
| Edwards | 93523, 93524 | — |
| Essex | 92332 | — |
| Fort Irwin | 92310 | — |
| Guatay | 91931 | — |
| Helendale | 92342 | — |
| Hesperia | 92340, 92345 | — |
| Hinkley | 92347 | — |
| Jacumba | 91934 | — |
| Johannesburg | 93528 | — |
| Joshua Tree | 92252 | — |
| Julian | 92036 | — |
| Lake Hughes | 93532 | — |
| Lancaster | 93534, 93535, 93536, 93539, 93584, 93586 | — |
| Landers | 92285 | — |
| Littlerock | 93543 | — |
| Llano | 93544 | — |
| Lucerne Valley | 92356 | — |
| Ludlow | 92338 | — |
| Mojave | 93501, 93502 | — |
| Morongo Valley | 92256 | — |
| Mount Laguna | 91948 | — |
| Mountain Pass | 92366 | — |
| Newberry Springs | 92365 | — |
| Nipton | 92364 | — |
| Oro Grande | 92368 | — |
| Palmdale | 93550, 93551, 93552, 93590, 93591, 93599 | — |
| Palo Verde | 92266 | — |
| Palomar Mountain | 92060 | — |
| Pearblossom | 93553 | — |
| Phelan | 92329, 92371 | — |
| Pine Valley | 91962 | — |
| Pinon Hills | 92372 | — |
| Pioneertown | 92268 | — |
| Potrero | 91963 | — |
| Ranchita | 92066 | — |
| Randsburg | 93554 | — |
| Red Mountain | 93558 | — |
| Ridgecrest | 93555, 93556 | — |
| Rosamond | 93560 | — |
| Santa Ysabel | 92070 | — |
| Shoshone | 92384 | — |
| Tecate | 91980, 91987 | — |
| Tecopa | 92389 | — |
| Trona | 93562, 93592 | — |
| Twentynine Palms | 92277, 92278 | — |
| Victorville | 92392, 92393, 92394 | — |
| Warner Springs | 92086 | — |
| Yermo | 92398 | — |
| Yucca Valley | 92284, 92286 | — |
| Other ZIP codes | 91990 | — |
Why the Exact Zone Matters for Your Report
Title 24 is one statewide energy code, but the energy budget your design is compared against is calibrated to the climate zone, and several prescriptive requirements change by zone. If your ZIP code is split between zones, we confirm the zone from the project address before modeling. See Climate Zone 14 Title 24 requirements and how Title 24 calculations work.
Find Your Zone
Browse our city Title 24 pages for local information, or send your project address and we'll confirm the climate zone and prepare your report. See also: how climate zones affect a Title 24 report and the Climate Zone 14 overview.
← Back to the Climate Zone 14 overview · All climate zones
More Climate Zone 14 guides: zone overview · Title 24 requirements · Title 24 cost · ADU requirements.
The same topic in neighbouring zones: Climate Zone 13 and Climate Zone 15. Statewide: finding your climate zone.