Planting zone for 90275 — Rancho Palos Verdes, CA
ZIP code 90275 (Rancho Palos Verdes, Los Angeles County) is in USDA zone 10b: the coldest winter night averages 35 to 40 °F.
Where ZIP 90275 is
Outlined: the ZIP code area · tap the map for the zone at any spot · scroll or pinch to zoomNot 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.
Was 11a on the 2012 map — half a zone colder now. The zone is the one at the center of the ZIP code; hilly ZIPs can span two zones. What zone 10b means →
Frost forecast — next 7 nights
live from the National Weather ServiceLoading the forecast for Rancho Palos Verdes, 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 Torrance Airport, CA — 4 miles away, elevation 89 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 90275 came on Jan 16 — 3 days earlier than the 1991–2020 average (Jan 19).
Jan 192026
Jan 16
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 Rancho Palos Verdes, CA
The soil mapped at the center of ZIP 90275 is Zaca — clay loam, well drained.
Map unit: Zaca-Ballast complex, 10 to 50 percent slopes.
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 90275; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.
Climate in Rancho Palos Verdes, CA
Average high and low, by month
Precipitation by month inches
NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Torrance Airport, CA (4 mi away); precipitation: Torrance 2.8 Sw, CA (3 mi away). Daylight is calculated from latitude.
Nearby ZIP codes
1 of the 8 nearest ZIP codes are in a different zone — elevation and distance from water change winter lows quickly.
Questions about 90275
What planting zone is ZIP code 90275?
ZIP code 90275 (Rancho Palos Verdes, CA) is in USDA hardiness zone 10b on the 2023 map: the coldest night of an average winter reaches 35 to 40 °F (1.7 to 4.4 °C).
How much rain and snow does 90275 get?
About 14.2 inches of precipitation a year (NOAA 1991–2020 normals, Torrance 2.8 Sw station).
How hot do summers get in Rancho Palos Verdes, CA?
The average high peaks at 78 °F in August, with about 6 days a year at 90 °F or more.
What kind of soil does 90275 have?
The USDA soil survey maps Zaca at the center of ZIP 90275: clay loam, well drained, pH about 7.6 (slightly alkaline).
Did spring come early in Rancho Palos Verdes, CA in 2026?
Spring leaf-out near 90275 came on Jan 16 in 2026, 3 days earlier than the 1991–2020 average (Jan 19), according to the USA National Phenology Network Spring Index.
What kind of onions grow in Rancho Palos Verdes, CA?
Intermediate onions: the longest day near 90275 is 14 h 24 min, so day-neutral types bulb best; long-day varieties may not bulb fully.
Did the zone for 90275 change?
Yes. The 2012 USDA map put 90275 in zone 11a; the 2023 map puts it in zone 10b. The newer map uses 1991–2020 data and more weather stations.