Data: 2023 USDA zones (PRISM/OSU) · NOAA 1991–2020 normals · updated

Planting zone for 92029 — Escondido, CA

ZIP code 92029 (Escondido, San Diego County) is in USDA zone 10a: the coldest winter night averages 30 to 35 °F.

Where ZIP 92029 is

Outlined: the ZIP code area · tap the map for the zone at any spot · scroll or pinch to zoom

Not the official USDA Plant Hardiness Zone Map. Zones come from the 2023 USDA hardiness-zone data by the PRISM Group, Oregon State University; we re-mapped and recolored them. The official map is at planthardiness.ars.usda.gov.

Zone10a30 to 35 °F
Coldest night−1.1 to 1.7 °C
Last frostrare
First frostrare
2012 zone10a

Same zone as on the 2012 map. The zone is the one at the center of the ZIP code; hilly ZIPs can span two zones. What zone 10a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Escondido, CA…

Forecast data: National Weather Service (api.weather.gov), public domain. This is not a warning service — for official frost and freeze warnings see weather.gov.

Frost dates

A 32 °F frost doesn't happen here in most winters. At the nearest station (NOAA station Escondido #2, CA — 3 miles away, elevation 600 ft) the median growing season is 365 days. When frost does come, it is a midwinter night or two; cover tender plants when a freeze is forecast.

Frost data: NOAA NCEI U.S. Climate Normals 1991–2020.

When spring arrived in 2026

In 2026, spring leaf-out near 92029 came on Jan 17 — 6 days earlier than the 1991–2020 average (Jan 23).

JanFebMarAprMayJun

The Spring Index marks the day when accumulated warmth is enough for lilac and honeysuckle to leaf out — a widely used signal that the growing season has started. Source: USA National Phenology Network, www.usanpn.org — Spring Indices, first leaf, 2026 (data as of 2026-09-08) and 30-year average 1991–2020 (CC BY 4.0).

Soil in Escondido, CA

The soil mapped at the center of ZIP 92029 is Cieneba — coarse sandy loam, somewhat excessively drained.

TextureCoarse sandy loamdrains and warms fast; dries out and needs more feeding
pH5.8moderately acidic; most vegetables like 6.0–7.0
DrainageSomewhat excessively drainednatural drainage class
Organic matter0.75%low — add compost
Hydrologic groupDwater soaks in very slowly
Farmland classNot prime farmlandUSDA classification

Map unit: Cieneba-Fallbrook rocky sandy loams, 30 to 65 percent slopes, eroded.

Soil Survey Staff, Natural Resources Conservation Service, USDA. Soil Survey Geographic (SSURGO) Database, via Soil Data Access, accessed 2026-10-29. The soil at the center point of ZIP 92029; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Escondido, CA

Summer high89 °Faverage high, August
Winter low44 °Faverage low, December
Hot days54days a year at 90 °F or more
Freezing nights2nights a year at 32 °F or less
Growing degree days5,796base 50 °F — the season’s usable heat
Longest day14 h 20 mindaylight on June 21
Shortest day9 h 58 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation14.5 inper year, rain and melted snow

Average high and low, by month

30°40°50°60°70°80°90°100°32 °FJanuary: average high 69 °F, low 45 °F 69°45° JanFebruary: average high 69 °F, low 46 °F 69°46° FebMarch: average high 71 °F, low 49 °F 71°49° MarApril: average high 74 °F, low 52 °F 74°52° AprMay: average high 77 °F, low 56 °F 77°56° MayJune: average high 82 °F, low 60 °F 82°60° JunJuly: average high 87 °F, low 64 °F 87°64° JulAugust: average high 89 °F, low 65 °F 89°65° AugSeptember: average high 87 °F, low 63 °F 87°63° SepOctober: average high 81 °F, low 57 °F 81°57° OctNovember: average high 75 °F, low 49 °F 75°49° NovDecember: average high 68 °F, low 44 °F 68°44° Dec

Precipitation by month inches

0″1″2″3″4″January: 3.19 in precipitation 3.2 JanFebruary: 3.57 in precipitation 3.6 FebMarch: 2.20 in precipitation 2.2 MarApril: 0.99 in precipitation 1.0 AprMay: 0.35 in precipitation 0.3 MayJune: 0.09 in precipitation 0.1 JunJuly: 0.12 in precipitation 0.1 JulAugust: 0.06 in precipitation 0.1 AugSeptember: 0.16 in precipitation 0.2 SepOctober: 0.57 in precipitation 0.6 OctNovember: 1.08 in precipitation 1.1 NovDecember: 2.14 in precipitation 2.1 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Escondido #2, CA (3 mi away); precipitation: Escondido #2, CA (3 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 10a.

9203010a
Escondido, CA · 3 mi
9203310a
Escondido, CA · 3 mi
9204610a
Escondido, CA · 3 mi
9209610a
San Marcos, CA · 3 mi
9207810a
San Marcos, CA · 4 mi
9209110a
Rancho Santa Fe, CA · 4 mi
9212710a
San Diego, CA · 5 mi
9207910a
San Marcos, CA · 5 mi

All 7 ZIP codes in Escondido → · California planting zones →

Questions about 92029

What planting zone is ZIP code 92029?

ZIP code 92029 (Escondido, CA) is in USDA hardiness zone 10a on the 2023 map: the coldest night of an average winter reaches 30 to 35 °F (−1.1 to 1.7 °C).

How much rain and snow does 92029 get?

About 14.5 inches of precipitation a year (NOAA 1991–2020 normals, Escondido #2 station).

How hot do summers get in Escondido, CA?

The average high peaks at 89 °F in August, with about 54 days a year at 90 °F or more.

What kind of soil does 92029 have?

The USDA soil survey maps Cieneba at the center of ZIP 92029: coarse sandy loam, somewhat excessively drained, pH about 5.8 (moderately acidic).

Did spring come early in Escondido, CA in 2026?

Spring leaf-out near 92029 came on Jan 17 in 2026, 6 days earlier than the 1991–2020 average (Jan 23), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Escondido, CA?

Intermediate onions: the longest day near 92029 is 14 h 20 min, so day-neutral types bulb best; long-day varieties may not bulb fully.