Planting zone for 90744 — Wilmington, CA
ZIP code 90744 (Wilmington, Los Angeles County) is in USDA zone 10b: the coldest winter night averages 35 to 40 °F.
Where ZIP 90744 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.
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 10b means →
Frost forecast — next 7 nights
live from the National Weather ServiceLoading the forecast for Wilmington, 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 — 5 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 90744 came on Jan 17 — 4 days earlier than the 1991–2020 average (Jan 21).
Jan 212026
Jan 17
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 Wilmington, CA
The soil mapped at the center of ZIP 90744 is Aquic Xerorthents — fine sandy loam, somewhat poorly drained. Much of the area is built over (urban land); this is the natural soil underneath.
Map unit: Urban land-Aquic Xerorthents-Xerorthents, dredged spoil complex, 0 to 2 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 90744; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.
Climate in Wilmington, CA
Average high and low, by month
Precipitation by month inches
NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Torrance Airport, CA (5 mi away); precipitation: Torrance 2.8 Sw, CA (4 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.
All 2 ZIP codes in Wilmington → · California planting zones →
Questions about 90744
What planting zone is ZIP code 90744?
ZIP code 90744 (Wilmington, 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 90744 get?
About 14.2 inches of precipitation a year (NOAA 1991–2020 normals, Torrance 2.8 Sw station).
How hot do summers get in Wilmington, 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 90744 have?
The USDA soil survey maps Aquic Xerorthents at the center of ZIP 90744: fine sandy loam, somewhat poorly drained, pH about 7.8 (slightly alkaline).
Did spring come early in Wilmington, CA in 2026?
Spring leaf-out near 90744 came on Jan 17 in 2026, 4 days earlier than the 1991–2020 average (Jan 21), according to the USA National Phenology Network Spring Index.
What kind of onions grow in Wilmington, CA?
Intermediate onions: the longest day near 90744 is 14 h 24 min, so day-neutral types bulb best; long-day varieties may not bulb fully.