Planting zone for 92328 — Death Valley, CA
ZIP code 92328 (Death Valley, Inyo County) is in USDA zone 9a: the coldest winter night averages 20 to 25 °F.
Where ZIP 92328 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 9a means →
Frost forecast — next 7 nights
live from the National Weather ServiceLoading the forecast for Death Valley, 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 Death Valley Np, CA — 9 miles away, elevation -194 ft) the median growing season is 350 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 92328 came on Jan 21 — 9 days earlier than the 1991–2020 average (Jan 30).
Jan 302026
Jan 21
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 Death Valley, CA
The soil mapped at the center of ZIP 92328 is Lithic Torriorthents — very gravelly fine sandy loam, somewhat excessively drained.
Map unit: Lithic Torriorthents, Typic Haplocalcids, and Rock outcrop; hyperthermic hills and mountains.
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 92328; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.
Climate in Death Valley, CA
Average high and low, by month
Precipitation by month inches
NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Death Valley Np, CA (9 mi away); precipitation: Death Valley Np, CA (9 mi away). Daylight is calculated from latitude.
Nearby ZIP codes
5 of the 8 nearest ZIP codes are in a different zone — elevation and distance from water change winter lows quickly.
Questions about 92328
What planting zone is ZIP code 92328?
ZIP code 92328 (Death Valley, CA) is in USDA hardiness zone 9a on the 2023 map: the coldest night of an average winter reaches 20 to 25 °F (−6.7 to −3.9 °C).
How much rain and snow does 92328 get?
About 2.2 inches of precipitation a year (NOAA 1991–2020 normals, Death Valley Np station).
How hot do summers get in Death Valley, CA?
The average high peaks at 117 °F in July, with about 197 days a year at 90 °F or more.
What kind of soil does 92328 have?
The USDA soil survey maps Lithic Torriorthents at the center of ZIP 92328: very gravelly fine sandy loam, somewhat excessively drained, pH about 7.8 (slightly alkaline).
Did spring come early in Death Valley, CA in 2026?
Spring leaf-out near 92328 came on Jan 21 in 2026, 9 days earlier than the 1991–2020 average (Jan 30), according to the USA National Phenology Network Spring Index.
What kind of onions grow in Death Valley, CA?
Intermediate onions: the longest day near 92328 is 14 h 39 min, so day-neutral types bulb best; long-day varieties may not bulb fully.