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

Planting zone for 89403 — Dayton, NV

ZIP code 89403 (Dayton, Lyon County) is in USDA zone 7a: the coldest winter night averages 0 to 5 °F. The median last spring frost is May 12 and the first fall frost October 17.

Where ZIP 89403 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.

Zone7a0 to 5 °F

Coldest night−17.8 to −15 °C

Last frostMay 12

First frostOct 17

2012 zone7a

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 7a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Dayton, 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 Dayton, NV

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostMay 12median — 50% chance of a later frost

Safe for tender plantsJune 5only 10% chance of frost after

First fall frostOctober 17median — 10% chance by Oct 1

Growing season155 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 24 and returns around October 31.

From the NOAA station Virginia City, NV — 11 miles away, elevation 6,339 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 89403

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Mar 31 – Apr 14

SpinachSow outdoors · Mar 31 – Apr 21

Broccoli, cabbageStart indoors · Mar 3 – Mar 17

Broccoli, cabbageTransplant · Apr 21 – May 5

Onion setsPlant outdoors · Apr 14 – Apr 28

PotatoesPlant outdoors · Apr 21 – May 5

LettuceSow outdoors · Apr 14 – Apr 28

Carrots, beetsSow outdoors · Apr 21 – May 5

TomatoesStart indoors · Mar 17 – Mar 31

TomatoesTransplant · May 19 – Jun 2

Peppers, eggplantStart indoors · Mar 3 – Mar 17

Peppers, eggplantTransplant · May 26 – Jun 9

BeansSow outdoors · May 19 – Jun 2

Sweet cornSow outdoors · May 19 – Jun 2

Cucumbers, squashSow outdoors · May 19 – Jun 2

Fall lettuce, spinachSow outdoors · Aug 22 – Sep 5

GarlicPlant cloves · Oct 3 – Nov 7

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 12) and first fall frost (Oct 17) 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 89403 came on Mar 15 — 23 days earlier than the 1991–2020 average (Apr 7).

average
Apr 72026
Mar 15

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 7a in Nevada

520 plants native to the lower 48 states, recorded in Nevada, and rated by the USDA to survive 0 °F or colder — the bottom of zone 7a. Each links to its USDA PLANTS profile.

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 Dayton, NV.

Soil in Dayton, NV

The soil mapped at the center of ZIP 89403 is Lapon — extremely stony loam, well drained.

TextureExtremely stony loama good balance for most vegetables

pH7.2neutral; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter1.5%low — add compost

Hydrologic groupDwater soaks in very slowly

Farmland classNot prime farmlandUSDA classification

Map unit: Lapon extremely stony loam, 15 to 30 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 89403; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Dayton, NV

Summer high84 °Faverage high, July

Winter low26 °Faverage low, December

Hot days10days a year at 90 °F or more

Freezing nights120nights a year at 32 °F or less

Growing degree days2,606base 50 °F — the season’s usable heat

Longest day14 h 56 mindaylight on June 21

Shortest day9 h 24 mindaylight on December 21

Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully

Precipitation11.7 inper year, rain and melted snow

Snowfall46 inper year; 46 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: Virginia City, NV (11 mi away); precipitation: Virginia City, NV (11 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

894287b

Silver City, NV · 9 mi

894407a

Virginia City, NV · 11 mi

897067b

Carson City, NV · 12 mi

894297a

Silver Springs, NV · 14 mi

895217a

Reno, NV · 15 mi

897017a

Carson City, NV · 15 mi

Nevada planting zones →

Questions about 89403

What planting zone is ZIP code 89403?

ZIP code 89403 (Dayton, NV) is in USDA hardiness zone 7a on the 2023 map: the coldest night of an average winter reaches 0 to 5 °F (−17.8 to −15 °C).

When is the last frost in Dayton, NV?

The median last spring frost (32 °F) near 89403 is May 12; after June 5 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Virginia City station.

When is the first frost in Dayton, NV?

The median first fall frost near 89403 is October 17, giving a median frost-free growing season of 155 days.

When should I plant tomatoes in 89403?

Start tomato seeds indoors around Mar 17 – Mar 31 and set transplants outside around May 19 – Jun 2, one to three weeks after the median last frost.

How much rain and snow does 89403 get?

About 11.7 inches of precipitation a year and 46 inches of snowfall (NOAA 1991–2020 normals, Virginia City station).

How hot do summers get in Dayton, NV?

The average high peaks at 84 °F in July, with about 10 days a year at 90 °F or more.

What kind of soil does 89403 have?

The USDA soil survey maps Lapon at the center of ZIP 89403: extremely stony loam, well drained, pH about 7.2 (neutral).

Did spring come early in Dayton, NV in 2026?

Spring leaf-out near 89403 came on Mar 15 in 2026, 23 days earlier than the 1991–2020 average (Apr 7), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Dayton, NV?

Intermediate onions: the longest day near 89403 is 14 h 56 min, so day-neutral types bulb best; long-day varieties may not bulb fully.