Data: 2023 USDA zones (PRISM/OSU) · NOAA 1991–2020 normals · updated Oct 29, 2026

Planting zone for 89438 — Valmy, NV

ZIP code 89438 (Valmy, Humboldt County) is in USDA zone 6b: the coldest winter night averages −5 to 0 °F. The median last spring frost is May 9 and the first fall frost September 29.

Where ZIP 89438 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.

Zone6b−5 to 0 °F

Coldest night−20.6 to −17.8 °C

Last frostMay 9

First frostSep 29

2012 zone6b

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 6b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Valmy, 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 Valmy, NV

JanFebMarAprMayJunJulAugSepOctNovDec

Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free

Last spring frostMay 9median — 50% chance of a later frost

Safe for tender plantsMay 31only 10% chance of frost after

First fall frostSeptember 29median — 10% chance by Sep 15

Growing season141 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 23 and returns around October 9.

From the NOAA station Battle Mountain 4se, NV — 18 miles away, elevation 4,505 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 89438

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Mar 28 – Apr 11

SpinachSow outdoors · Mar 28 – Apr 18

Broccoli, cabbageStart indoors · Feb 28 – Mar 14

Broccoli, cabbageTransplant · Apr 18 – May 2

Onion setsPlant outdoors · Apr 11 – Apr 25

PotatoesPlant outdoors · Apr 18 – May 2

LettuceSow outdoors · Apr 11 – Apr 25

Carrots, beetsSow outdoors · Apr 18 – May 2

TomatoesStart indoors · Mar 14 – Mar 28

TomatoesTransplant · May 16 – May 30

Peppers, eggplantStart indoors · Feb 28 – Mar 14

Peppers, eggplantTransplant · May 23 – Jun 6

BeansSow outdoors · May 16 – May 30

Sweet cornSow outdoors · May 16 – May 30

Cucumbers, squashSow outdoors · May 16 – May 30

Fall lettuce, spinachSow outdoors · Aug 4 – Aug 18

GarlicPlant cloves · Sep 15 – Oct 20

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 9) and first fall frost (Sep 29) 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 89438 came on Mar 18 — 3 days earlier than the 1991–2020 average (Mar 21).

average
Mar 212026
Mar 18

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 Valmy, NV

The soil mapped at the center of ZIP 89438 is Whirlo — gravelly very fine sandy loam, well drained.

TextureGravelly very fine sandy loamdrains and warms fast; dries out and needs more feeding

pH7.9alkaline; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter0.25%low — add compost

Hydrologic groupBwater soaks in moderately

Farmland classNot prime farmlandUSDA classification

Map unit: Whirlo-Oxcorel-Weso 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 89438; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Valmy, NV

Summer high100 °Faverage high, July

Winter low22 °Faverage low, January

Hot days82days a year at 90 °F or more

Freezing nights158nights a year at 32 °F or less

Growing degree days3,431base 50 °F — the season’s usable heat

Longest day15 h 06 mindaylight on June 21

Shortest day9 h 14 mindaylight on December 21

Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)

Precipitation9.2 inper year, rain and melted snow

Snowfall21 inper year; 22 days with snow on the ground

Average high and low, by month

Precipitation by month inches · ❄ = snowfall

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Battle Mountain 4se, NV (18 mi away); precipitation: Battle Mountain 4se, NV (18 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.

894146b

Golconda, NV · 18 mi

898206b

Battle Mountain, NV · 27 mi

898216a

Crescent Valley, NV · 41 mi

894466b

Winnemucca, NV · 43 mi

894186b

Imlay, NV · 50 mi

894456b

Winnemucca, NV · 51 mi

894266a

Paradise Valley, NV · 53 mi

898225b

Carlin, NV · 54 mi

Nevada planting zones →

Questions about 89438

What planting zone is ZIP code 89438?

ZIP code 89438 (Valmy, NV) is in USDA hardiness zone 6b on the 2023 map: the coldest night of an average winter reaches −5 to 0 °F (−20.6 to −17.8 °C).

When is the last frost in Valmy, NV?

The median last spring frost (32 °F) near 89438 is May 9; after May 31 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Battle Mountain 4se station.

When is the first frost in Valmy, NV?

The median first fall frost near 89438 is September 29, giving a median frost-free growing season of 141 days.

When should I plant tomatoes in 89438?

Start tomato seeds indoors around Mar 14 – Mar 28 and set transplants outside around May 16 – May 30, one to three weeks after the median last frost.

How much rain and snow does 89438 get?

About 9.2 inches of precipitation a year and 21 inches of snowfall (NOAA 1991–2020 normals, Battle Mountain 4se station).

How hot do summers get in Valmy, NV?

The average high peaks at 100 °F in July, with about 82 days a year at 90 °F or more.

What kind of soil does 89438 have?

The USDA soil survey maps Whirlo at the center of ZIP 89438: gravelly very fine sandy loam, well drained, pH about 7.9 (alkaline).

Did spring come early in Valmy, NV in 2026?

Spring leaf-out near 89438 came on Mar 18 in 2026, 3 days earlier than the 1991–2020 average (Mar 21), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Valmy, NV?

Long-day onions: the longest day near 89438 is 15 h 06 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).