Garden Climate for Campo, CA 91906

Zone 9a · Last frost ~Apr 30 · Soil 64.0°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 · Campo focus

2023 USDA Plant Hardiness Zone Map around ZIP 91906, marker at Campo, 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 30
avg last frost (50%)
Soil temp Modeled
64.0°F
↓ 10.8° in 7 days
Chill hours
—
unavailable
Rain
2.32″
since Oct 1 · normal 0.20″

Frost dates for 91906

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) 4.2 km away 27 yrs of record · 463 ft lower than this ZIP

Newsletter · 91906

Frost alerts and planting reminders for 91906. Coming soon.

Ad strip · leaderboard 970×90 / 728×90

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

High wind: 3 day(s) with gusts ≥40 mph. Stake and protect transplants.
Fri 16
76° 58° gust 56 mph 💧6%
High wind
Sat 17
71° 54° gust 45 mph 💧5%
High wind
Sun 18
76° 53° gust 24 mph 💧1%
Clear
Mon 19
77° 51° gust 18 mph 💧3%
Clear
Tue 20
67° 47° gust 43 mph 💧51% · 0.01″
High windRain
Wed 21
61° 44° gust 35 mph 💧66% · 0.29″
Rain
Thu 22
62° 42° gust 22 mph 💧23% · 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 · 91906

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 91906

What USDA hardiness zone is 91906?

ZIP 91906 (Campo, 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 91906?

Based on NOAA 1991–2020 normals at Ca Campo (4.2 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 91905 Boulevard 91980 Tecate 91962 Pine Valley 91931 Guatay 91948 Mount Laguna

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) 4.2 km away 27 yrs of record · 463 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: 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/91906.json