Garden Climate for Ranchita, CA 92066

Zone 9a · Last frost ~Apr 19 · Soil 58.6°F today (modeled) · See your place on the 2023 USDA zone map

Public NOAA/USDA data, updated 2026-10-16 18:57 UTC.

USDA Plant Hardiness Zone Map · Ranchita focus

2023 USDA Plant Hardiness Zone Map around ZIP 92066, marker at Ranchita, CA
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USDA Plant Hardiness Zone Map, 2023. Agricultural Research Service, U.S. Department of Agriculture. Accessed from https://planthardiness.ars.usda.gov/. Rendered unaltered from the PRISM Group, Oregon State University GIS data (https://prism.oregonstate.edu, accessed 15 Oct 2026) with official zone colors. Roads (TIGER/Line 2023 primary roads), place names (2023 Gazetteer) and state lines (2023 cartographic boundaries 1:500k) are drawn on top. Source: U.S. Census Bureau.

Zone
9a
USDA 2023 · 20 to 25°F
Last frost
Apr 19
avg last frost (50%)
Soil temp Modeled
58.6°F
↓ 20.1° in 7 days
Chill hours
—
unavailable
Rain
—
since Oct 1 · not enough data

Frost dates for 92066

Last spring frost
Apr 19
50% odds
First fall frost
Oct 27
50% odds
Safer spring date
May 14
10% chance of later frost
Growing season
190
days (50%)

Earliest-risk fall date (10%): Oct 9.

NOAA NCEI U.S. Climate Normals 1991-2020, annual/seasonal freeze probabilities (32F) · CA CUYAMACA HCN (USC00042239) 25.4 km away 25 yrs of record · 577 ft higher than this ZIP

Newsletter · 92066

Frost alerts and planting reminders for 92066. Coming soon.

Ad strip · leaderboard 970×90 / 728×90

7-day forecast · High / Low / Rain / Frost / Wind

High wind: 1 day(s) with gusts ≥40 mph. Stake and protect transplants.
Fri 16
71° 57° gust 46 mph 💧3%
High wind
Sat 17
65° 54° gust 32 mph 💧2%
Clear
Sun 18
69° 55° gust 20 mph 💧1%
Clear
Mon 19
71° 51° gust 20 mph 💧5%
Clear
Tue 20
62° 48° gust 30 mph 💧40% · 0.01″
Clear
Wed 21
57° 45° gust 25 mph 💧62% · 0.24″
Rain
Thu 22
58° 44° gust 24 mph 💧24% · 0.01″
Clear

NOAA NWS api.weather.gov (SGX). Frost = low ≤32°F · High wind = gust ≥40 mph · 💧 = chance of precipitation and expected amount (NWS quantitative precipitation forecast; blank when NWS gives none) · Rain = chance ≥50%.

What to grow when · 92066

Calendar: San Diego County, mountains (900 m / ~3,000 ft and up). Planting months from University of Arizona Cooperative Extension Yavapai County Bulletin #51 'Yavapai County Vegetable Planting Dates' (an out-of-county analog; no San Diego-specific guide covers this area). Harvest months add typical days-to-harvest. This month also checks live soil temperature and the 7-day frost forecast. The harvest planner uses the same calendar. Rules: methodology.

Affiliate links (disclosed). Placeholders, no partners yet:Frost clothSoil thermometer

Questions about 92066

What USDA hardiness zone is 92066?

ZIP 92066 (Ranchita, CA) is in USDA zone 9a (20 to 25°F average annual extreme minimum), per the 2023 USDA Plant Hardiness Zone Map.

When is the last frost in 92066?

Based on NOAA 1991–2020 normals at Ca Cuyamaca Hcn (25.4 km away), the median last 32°F freeze is Apr 19. In 1 of 10 years it is after May 14. The median first fall freeze is Oct 27.

Nearby ZIP codes

92086 Warner Springs 92070 Santa Ysabel 92036 Julian 92065 Ramona 92060 Palomar Mountain 92004 Borrego Springs

Sources for this page

  • Location: US Census Bureau 2023 Gazetteer, ZCTA internal point
  • Zone: USDA Plant Hardiness Zone Map 2023, ZIP datasets (USDA ARS + PRISM Climate Group, Oregon State University)
  • Frost: NOAA NCEI U.S. Climate Normals 1991-2020, annual/seasonal freeze probabilities (32F) CA CUYAMACA HCN (USC00042239) 25.4 km away 25 yrs of record · 577 ft higher than this ZIP
  • Forecast: NOAA National Weather Service api.weather.gov (7-day forecast + gridpoint wind gusts)
  • Soil: Open-Meteo forecast API soil model (non-commercial terms)
  • Chill: RuntimeError: not enough nearby data: no suitable hourly weather station within 25 km
  • Raw data: /data/zip/92066.json