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

Planting zone for 89020 — Amargosa Valley, NV

ZIP code 89020 (Amargosa Valley, Nye County) is in USDA zone 8b: the coldest winter night averages 15 to 20 °F. The median last spring frost is March 15 and the first fall frost November 13.

Where ZIP 89020 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.

Zone8b15 to 20 °F
Coldest night−9.4 to −6.7 °C
Last frostMar 15
First frostNov 13
2012 zone8b

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 8b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Amargosa Valley, NV…

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 in Amargosa Valley, NV

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMarch 15median — 50% chance of a later frost
Safe for tender plantsApril 9only 10% chance of frost after
First fall frostNovember 13median — 10% chance by Oct 29
Growing season237 daysfrost-free, median

A hard freeze (28 °F) usually ends around February 23 and returns around November 24.

From the NOAA station Amargosa Farms-Garey, NV — 2 miles away, elevation 2,451 ft. NOAA NCEI U.S. Climate Normals 1991–2020, 32 °F threshold. Low spots and valleys can freeze later in spring than the station.

When to plant vegetables in 89020

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Feb 1 – Feb 15
SpinachSow outdoors · Feb 1 – Feb 22
Broccoli, cabbageStart indoors · Jan 4 – Jan 18
Broccoli, cabbageTransplant · Feb 22 – Mar 8
Onion setsPlant outdoors · Feb 15 – Mar 1
PotatoesPlant outdoors · Feb 22 – Mar 8
LettuceSow outdoors · Feb 15 – Mar 1
Carrots, beetsSow outdoors · Feb 22 – Mar 8
TomatoesStart indoors · Jan 18 – Feb 1
TomatoesTransplant · Mar 22 – Apr 5
Peppers, eggplantStart indoors · Jan 4 – Jan 18
Peppers, eggplantTransplant · Mar 29 – Apr 12
BeansSow outdoors · Mar 22 – Apr 5
Sweet cornSow outdoors · Mar 22 – Apr 5
Cucumbers, squashSow outdoors · Mar 22 – Apr 5
Fall lettuce, spinachSow outdoors · Sep 18 – Oct 2
GarlicPlant cloves · Oct 30 – Dec 4
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Mar 15) and first fall frost (Nov 13) with the rules of thumb U.S. extension services publish. Cool-season crops take a light frost; warm-season crops do best once the soil is above about 60 °F.

When spring arrived in 2026

In 2026, spring leaf-out near 89020 came on Jan 28 — 5 days earlier than the 1991–2020 average (Feb 2).

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).

Native plants for zone 8b in Nevada

538 plants native to the lower 48 states, recorded in Nevada, and rated by the USDA to survive 15 °F or colder — the bottom of zone 8b. Each links to its USDA PLANTS profile.

Trees 29

Arizona cypress50 ft · blooms spring · low shade tolerance · to −23 °Fbalsam poplar80 ft · blooms late spring · high shade tolerance · to −79 °Fblack locust60 ft · blooms spring · high shade tolerance · to −37 °Fboxelder60 ft · blooms early spring · low shade tolerance · to −46 °FCalifornia red fir150 ft · blooms late spring · low shade tolerance · to −23 °FDouglas-fir200 ft · blooms mid spring · medium shade tolerance · to −33 °F

Shrubs 110

alderleaf mountain mahogany15 ft · blooms late spring · medium shade tolerance · to −41 °Falpine laurel1 ft · blooms late spring · low shade tolerance · to −28 °Fantelope bitterbrush6 ft · blooms early spring · medium shade tolerance · to −36 °FApache plume6 ft · blooms late spring · high shade tolerance · to −23 °Fbig sagebrush4 ft · blooms mid summer · high shade tolerance · to −43 °Fbig saltbush10 ft · blooms early summer · high shade tolerance · to 7 °F

Wildflowers & perennials 254

alkali buttercup1 ft · blooms late spring · low shade tolerance · to −38 °Falpine bistort1 ft · blooms mid spring · high shade tolerance · to −38 °Falpine mountainsorrel1 ft · blooms mid summer · medium shade tolerance · to −43 °FAmerican alpine speedwell1 ft · blooms summer · medium shade tolerance · to −28 °FAmerican bistort1.5 ft · blooms mid spring · high shade tolerance · to −38 °FAmerican eelgrass1 ft · blooms mid summer · high shade tolerance · to −33 °F

Grasses 135

Alaska oniongrass3 ft · blooms mid spring · low shade tolerance · to −33 °Falkali cordgrass3 ft · blooms late summer · high shade tolerance · to −38 °Falkali sacaton3 ft · blooms mid summer · high shade tolerance · to −38 °Falpine timothy1.4 ft · blooms late spring · medium shade tolerance · to −43 °Fanalogue sedge1.5 ft · blooms late spring · medium shade tolerance · to −38 °Farctic bluegrass2 ft · high shade tolerance · to −62 °F

Vines 1

western white clematis1 ft · blooms mid summer · medium shade tolerance · to −38 °F

Source: USDA, NRCS. 2026. The PLANTS Database (plants.usda.gov), National Plant Data Team — state distribution, native status and the “Temperature, Minimum” characteristic. Check light, moisture and soil needs before buying; local nurseries and your state native plant society can confirm what thrives in Amargosa Valley, NV.

Soil in Amargosa Valley, NV

The soil mapped at the center of ZIP 89020 is Sanwell — gravelly fine sandy loam, well drained.

TextureGravelly fine sandy loamdrains and warms fast; dries out and needs more feeding
pH8.2alkaline; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter0.25%low — add compost
Hydrologic groupBwater soaks in moderately
Farmland classFarmland of statewide importance, if irrigatedUSDA classification

Map unit: Sanwell-Sanwell, warm-Yermo association.

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 89020; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Amargosa Valley, NV

Summer high104 °Faverage high, July
Winter low31 °Faverage low, December
Hot days141days a year at 90 °F or more
Freezing nights54nights a year at 32 °F or less
Growing degree days5,850base 50 °F — the season’s usable heat
Longest day14 h 40 mindaylight on June 21
Shortest day9 h 39 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation3.8 inper year, rain and melted snow

Average high and low, by month

20°30°40°50°60°70°80°90°100°110°32 °FJanuary: average high 59 °F, low 32 °F 59°32° JanFebruary: average high 63 °F, low 35 °F 63°35° FebMarch: average high 70 °F, low 40 °F 70°40° MarApril: average high 78 °F, low 46 °F 78°46° AprMay: average high 87 °F, low 55 °F 87°55° MayJune: average high 97 °F, low 63 °F 97°63° JunJuly: average high 104 °F, low 71 °F 104°71° JulAugust: average high 101 °F, low 68 °F 101°68° AugSeptember: average high 95 °F, low 60 °F 95°60° SepOctober: average high 82 °F, low 49 °F 82°49° OctNovember: average high 68 °F, low 37 °F 68°37° NovDecember: average high 58 °F, low 31 °F 58°31° Dec

Precipitation by month inches

0″1″January: 0.61 in precipitation, 0.2 in snowfall 0.6 JanFebruary: 0.89 in precipitation 0.9 FebMarch: 0.51 in precipitation 0.5 MarApril: 0.19 in precipitation 0.2 AprMay: 0.10 in precipitation 0.1 MayJune: 0.08 in precipitation 0.1 JunJuly: 0.18 in precipitation 0.2 JulAugust: 0.16 in precipitation 0.2 AugSeptember: 0.17 in precipitation 0.2 SepOctober: 0.24 in precipitation 0.2 OctNovember: 0.22 in precipitation 0.2 NovDecember: 0.42 in precipitation 0.4 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Amargosa Farms-Garey, NV (2 mi away); precipitation: Amargosa Farms-Garey, NV (2 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

3 of the 8 nearest ZIP codes are in a different zone — elevation and distance from water change winter lows quickly.

890608b
Pahrump, NV · 23 mi
890238b
Mercury, NV · 25 mi
890038a
Beatty, NV · 33 mi
923289a
Death Valley, CA · 34 mi
890418b
Pahrump, NV · 34 mi
890488b
Pahrump, NV · 37 mi
923848b
Shoshone, CA · 40 mi
890188a
Indian Springs, NV · 42 mi

Nevada planting zones →

Questions about 89020

What planting zone is ZIP code 89020?

ZIP code 89020 (Amargosa Valley, NV) is in USDA hardiness zone 8b on the 2023 map: the coldest night of an average winter reaches 15 to 20 °F (−9.4 to −6.7 °C).

When is the last frost in Amargosa Valley, NV?

The median last spring frost (32 °F) near 89020 is March 15; after April 9 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Amargosa Farms-Garey station.

When is the first frost in Amargosa Valley, NV?

The median first fall frost near 89020 is November 13, giving a median frost-free growing season of 237 days.

When should I plant tomatoes in 89020?

Start tomato seeds indoors around Jan 18 – Feb 1 and set transplants outside around Mar 22 – Apr 5, one to three weeks after the median last frost.

How much rain and snow does 89020 get?

About 3.8 inches of precipitation a year (NOAA 1991–2020 normals, Amargosa Farms-Garey station).

How hot do summers get in Amargosa Valley, NV?

The average high peaks at 104 °F in July, with about 141 days a year at 90 °F or more.

What kind of soil does 89020 have?

The USDA soil survey maps Sanwell at the center of ZIP 89020: gravelly fine sandy loam, well drained, pH about 8.2 (alkaline).

Did spring come early in Amargosa Valley, NV in 2026?

Spring leaf-out near 89020 came on Jan 28 in 2026, 5 days earlier than the 1991–2020 average (Feb 2), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Amargosa Valley, NV?

Intermediate onions: the longest day near 89020 is 14 h 40 min, so day-neutral types bulb best; long-day varieties may not bulb fully.