Garden Climate for Santa Ysabel, CA 92070

Zone 9a · Last frost ~Apr 18 · Soil 56.9°F today (modeled) · See your place on the 2023 USDA zone map

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

USDA Plant Hardiness Zone Map · Santa Ysabel focus

2023 USDA Plant Hardiness Zone Map around ZIP 92070, marker at Santa Ysabel, 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 18
avg last frost (50%)
Soil temp Modeled
56.9°F
↓ 10.5° in 7 days
Chill hours
—
starts Nov 1
Rain
3.06″
since Oct 1 · normal 0.30″

Frost dates for 92070

Last spring frost
Apr 18
50% odds
First fall frost
Oct 26
50% odds
Safer spring date
May 14
10% chance of later frost
Growing season
189
days (50%)

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

NOAA NCEI U.S. Climate Normals 1991-2020, annual/seasonal freeze probabilities (32F) · CA HENSHAW DAM (USC00043914) 11.7 km away 23 yrs of record · 371 ft lower than this ZIP

Newsletter · 92070

Frost alerts and planting reminders for 92070. Coming soon.

Ad strip · leaderboard 970×90 / 728×90

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

High wind: 2 day(s) with gusts ≥40 mph. Stake and protect transplants.
Fri 16
71° 61° gust 55 mph 💧5%
High wind
Sat 17
67° 56° gust 46 mph 💧5%
High wind
Sun 18
70° 56° gust 21 mph 💧1%
Clear
Mon 19
70° 51° gust 20 mph 💧6%
Clear
Tue 20
59° 49° gust 36 mph 💧59% · 0.03″
Rain
Wed 21
54° 46° gust 29 mph 💧70% · 0.61″
Rain
Thu 22
55° 45° gust 22 mph 💧32% · 0.10″
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 · 92070

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 92070

What USDA hardiness zone is 92070?

ZIP 92070 (Santa Ysabel, 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 92070?

Based on NOAA 1991–2020 normals at Ca Henshaw Dam (11.7 km away), the median last 32°F freeze is Apr 18. In 1 of 10 years it is after May 14. The median first fall freeze is Oct 26.

Nearby ZIP codes

92086 Warner Springs 92065 Ramona 92066 Ranchita 92060 Palomar Mountain 92061 Pauma Valley 92027 Escondido

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 HENSHAW DAM (USC00043914) 11.7 km away 23 yrs of record · 371 ft lower 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: Iowa Environmental Mesonet ASOS archive (NWS/FAA METAR routine + special obs; one value per clock hour)
  • Raw data: /data/zip/92070.json