Garden Climate for Rancho Santa Fe, CA 92091

Zone 10a · Frost-free in most years · Soil 72.1°F today (measured) · See your place on the 2023 USDA zone map

This ZIP is part of San Diego & Rancho Santa Fe, where nearby ZIPs share the same stations and zone. That page compares every ZIP in the area.

Public NOAA/USDA data, updated 2026-10-16 19:24 UTC.

USDA Plant Hardiness Zone Map · Rancho Santa Fe focus

2023 USDA Plant Hardiness Zone Map around ZIP 92091, marker at Rancho Santa Fe, 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
10a
USDA 2023 · 30 to 35°F
Last frost
None
frost-free ≥9 of 10 yrs
Soil temp Measured
72.1°F
↓ 14.7° in 7 days
Chill hours
—
starts Nov 1
Rain
1.02″
since Oct 1 · normal 0.19″

Frost dates for 92091

Frost-free in most years. No 32F freeze in at least 9 of 10 years at this station (NCEI reports no freeze dates; growing season = 365 days).

NOAA NCEI U.S. Climate Normals 1991-2020, annual/seasonal freeze probabilities (32F) · CA SAN DIEGO MIRAMAR NAS (USW00093107) 13.4 km away 24 yrs of record · 217 ft lower than this ZIP

Newsletter · 92091

Frost alerts and planting reminders for 92091. 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
92° 72° gust 47 mph 💧2%
High wind
Sat 17
89° 65° gust 35 mph 💧2%
Clear
Sun 18
86° 64° gust 17 mph 💧1%
Clear
Mon 19
81° 61° gust 16 mph 💧12%
Clear
Tue 20
72° 59° gust 24 mph 💧66% · 0.05″
Rain
Wed 21
70° 57° gust 20 mph 💧66% · 0.58″
Rain
Thu 22
68° 57° gust 15 mph 💧34% · 0.12″
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 · 92091

Calendar: San Diego County, inland valleys (guide Regions 3-4). Planting months from UC Master Gardeners of San Diego County; Master Gardener Association of San Diego County. 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 92091

What USDA hardiness zone is 92091?

ZIP 92091 (Rancho Santa Fe, CA) is in USDA zone 10a (30 to 35°F average annual extreme minimum), per the 2023 USDA Plant Hardiness Zone Map.

When is the last frost in 92091?

The nearest NOAA normals station (Ca San Diego Miramar Nas, 13.4 km) records no 32°F freeze in at least 9 of 10 years (1991–2020).

Nearby ZIP codes

92067 Rancho Santa Fe 92029 Escondido 92127 San Diego 92024 Encinitas 92078 San Marcos 92009 Carlsbad

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 SAN DIEGO MIRAMAR NAS (USW00093107) 13.4 km away 24 yrs of record · 217 ft lower than this ZIP
  • Forecast: NOAA National Weather Service api.weather.gov (7-day forecast + gridpoint wind gusts)
  • Soil: NOAA U.S. Climate Reference Network (USCRN) hourly02, SOIL_TEMP_10
  • Chill: Iowa Environmental Mesonet ASOS archive (NWS/FAA METAR routine + special obs; one value per clock hour)
  • Raw data: /data/zip/92091.json