Garden Climate for Coronado, CA 92118

Zone 10b · Frost-free in most years · Soil 72.9°F today (modeled) · See your place on the 2023 USDA zone map

This ZIP is part of San Diego, Chula Vista, Coronado area, 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 · Coronado focus

2023 USDA Plant Hardiness Zone Map around ZIP 92118, marker at Coronado, CA
8a8b9a9b10a10b11a11b

The map pixel at the marker shows 11a. The ZIP lookup table gives 10b for the whole ZIP area. Zone edges run through or near this ZIP.

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
10b
USDA 2023 · 35 to 40°F
Last frost
None
frost-free ≥9 of 10 yrs
Soil temp Modeled
72.9°F
↓ 5.7° in 7 days
Chill hours
—
starts Nov 1
Rain
1.04″
since Oct 1 · normal 0.17″

Frost dates for 92118

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 NORTH ISLAND NAS (USW00093112) 3.5 km away 25 yrs of record · about the same elevation

Newsletter · 92118

Frost alerts and planting reminders for 92118. Coming soon.

Ad strip · leaderboard 970×90 / 728×90

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

Fri 16
94° 73° gust 21 mph 💧7%
Clear
Sat 17
89° 69° gust 16 mph 💧7%
Clear
Sun 18
84° 68° gust 22 mph 💧0%
Clear
Mon 19
79° 67° gust 17 mph 💧7%
Clear
Tue 20
70° 64° gust 21 mph 💧67% · 0.05″
Rain
Wed 21
69° 63° gust 22 mph 💧67% · 0.52″
Rain
Thu 22
68° 63° gust 16 mph 💧36% · 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 · 92118

Calendar: San Diego County, coastal (guide Regions 1-2). 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 92118

What USDA hardiness zone is 92118?

ZIP 92118 (Coronado, CA) is in USDA zone 10b (35 to 40°F average annual extreme minimum), per the 2023 USDA Plant Hardiness Zone Map.

When is the last frost in 92118?

The nearest NOAA normals station (Ca North Island Nas, 3.5 km) records no 32°F freeze in at least 9 of 10 years (1991–2020).

Nearby ZIP codes

92135 San Diego 92106 San Diego 92147 San Diego 92132 San Diego 92101 San Diego 92140 San Diego

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 NORTH ISLAND NAS (USW00093112) 3.5 km away 25 yrs of record · about the same elevation
  • 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/92118.json