Garden Climate for Tecate, CA 91980

Zone 9b · Last frost ~Apr 30 · Soil 64.6°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 · Tecate focus

2023 USDA Plant Hardiness Zone Map around ZIP 91980, marker at Tecate, 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
9b
USDA 2023 · 25 to 30°F
Last frost
Apr 30
avg last frost (50%)
Soil temp Modeled
64.6°F
↓ 12.6° in 7 days
Chill hours
—
unavailable
Rain
2.32″
since Oct 1 · normal 0.20″

Frost dates for 91980

Last spring frost
Apr 30
50% odds
First fall frost
Oct 26
50% odds
Safer spring date
Jun 1
10% chance of later frost
Growing season
174
days (50%)

Earliest-risk fall date (10%): Sep 30.

NOAA NCEI U.S. Climate Normals 1991-2020, annual/seasonal freeze probabilities (32F) · CA CAMPO (USC00041424) 14.6 km away 27 yrs of record · 735 ft higher than this ZIP

Newsletter · 91980

Frost alerts and planting reminders for 91980. 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
84° 65° gust 59 mph 💧9%
High wind
Sat 17
79° 61° gust 47 mph 💧9%
High wind
Sun 18
83° 59° gust 24 mph 💧0%
Clear
Mon 19
81° 57° gust 17 mph 💧3%
Clear
Tue 20
71° 53° gust 35 mph 💧59% · 0.01″
Rain
Wed 21
66° 50° gust 28 mph 💧67% · 0.35″
Rain
Thu 22
66° 49° gust 18 mph 💧26% · 0.05″
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 · 91980

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 91980

What USDA hardiness zone is 91980?

ZIP 91980 (Tecate, CA) is in USDA zone 9b (25 to 30°F average annual extreme minimum), per the 2023 USDA Plant Hardiness Zone Map.

When is the last frost in 91980?

Based on NOAA 1991–2020 normals at Ca Campo (14.6 km away), the median last 32°F freeze is Apr 30. In 1 of 10 years it is after Jun 1. The median first fall freeze is Oct 26.

Nearby ZIP codes

91963 Potrero 91917 Dulzura 91906 Campo 91935 Jamul 91901 Alpine 92179 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 CAMPO (USC00041424) 14.6 km away 27 yrs of record · 735 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 hourly weather station within 40 km on the same side of the coastal/inland divide
  • Raw data: /data/zip/91980.json