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

Planting zone for 89040 — Overton, NV

ZIP code 89040 (Overton, Clark County) is in USDA zone 9b: the coldest winter night averages 25 to 30 °F. The median last spring frost is January 23 and the first fall frost December 13.

Where ZIP 89040 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.

Zone9b25 to 30 °F

Coldest night−3.9 to −1.1 °C

Last frostJan 23

First frostDec 13

2012 zone9a

Was 9a on the 2012 map — half a zone warmer now. The zone is the one at the center of the ZIP code; hilly ZIPs can span two zones. What zone 9b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Overton, 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 Overton, NV

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostJanuary 23median — 50% chance of a later frost

Safe for tender plantsFebruary 19only 10% chance of frost after

First fall frostDecember 13median — 10% chance by Nov 27

Growing season327 daysfrost-free, median

A hard freeze (28 °F) usually ends around January 3 and returns around December 26.

From the NOAA station Valley Of Fire Sp, NV — 6 miles away, elevation 2,001 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 89040

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Dec 12 – Dec 26

SpinachSow outdoors · Dec 12 – Jan 2

Broccoli, cabbageStart indoors · Nov 14 – Nov 28

Broccoli, cabbageTransplant · Jan 2 – Jan 16

Onion setsPlant outdoors · Dec 26 – Jan 9

PotatoesPlant outdoors · Jan 2 – Jan 16

LettuceSow outdoors · Dec 26 – Jan 9

Carrots, beetsSow outdoors · Jan 2 – Jan 16

TomatoesStart indoors · Nov 28 – Dec 12

TomatoesTransplant · Jan 30 – Feb 13

Peppers, eggplantStart indoors · Nov 14 – Nov 28

Peppers, eggplantTransplant · Feb 6 – Feb 20

BeansSow outdoors · Jan 30 – Feb 13

Sweet cornSow outdoors · Jan 30 – Feb 13

Cucumbers, squashSow outdoors · Jan 30 – Feb 13

Fall lettuce, spinachSow outdoors · Oct 18 – Nov 1

GarlicPlant cloves · Nov 29 – Jan 3

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Jan 23) and first fall frost (Dec 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 89040 came on Jan 28 — about the same time as the 1991–2020 average (Jan 30).

average
Jan 302026
Jan 28

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 9b in Nevada

544 plants native to the lower 48 states, recorded in Nevada, and rated by the USDA to survive 25 °F or colder — the bottom of zone 9b. 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 Overton, NV.

Soil in Overton, NV

The soil mapped at the center of ZIP 89040 is St. Thomas — extremely stony fine sandy loam, well drained.

TextureExtremely stony 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 groupDwater soaks in very slowly

Farmland classNot prime farmlandUSDA classification

Map unit: St. Thomas-Rock outcrop complex.

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 89040; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Overton, NV

Summer high105 °Faverage high, July

Winter low39 °Faverage low, December

Hot days144days a year at 90 °F or more

Freezing nights9nights a year at 32 °F or less

Growing degree days7,662base 50 °F — the season’s usable heat

Longest day14 h 38 mindaylight on June 21

Shortest day9 h 41 mindaylight on December 21

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

Precipitation6.3 inper year, rain and melted snow

Average high and low, by month

Precipitation by month inches

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Valley Of Fire Sp, NV (6 mi away); precipitation: Valley Of Fire Sp, NV (6 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.

889019a

The Lakes, NV · 17 mi

890219a

Logandale, NV · 20 mi

890679a

Moapa, NV · 23 mi

890379a

Coyote Springs, NV · 26 mi

890259a

Moapa, NV · 27 mi

891569b

Las Vegas, NV · 29 mi

890119b

Henderson, NV · 31 mi

890159b

Henderson, NV · 31 mi

Nevada planting zones →

Questions about 89040

What planting zone is ZIP code 89040?

ZIP code 89040 (Overton, NV) is in USDA hardiness zone 9b on the 2023 map: the coldest night of an average winter reaches 25 to 30 °F (−3.9 to −1.1 °C).

When is the last frost in Overton, NV?

The median last spring frost (32 °F) near 89040 is January 23; after February 19 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Valley Of Fire Sp station.

When is the first frost in Overton, NV?

The median first fall frost near 89040 is December 13, giving a median frost-free growing season of 327 days.

When should I plant tomatoes in 89040?

Start tomato seeds indoors around Nov 28 – Dec 12 and set transplants outside around Jan 30 – Feb 13, one to three weeks after the median last frost.

How much rain and snow does 89040 get?

About 6.3 inches of precipitation a year (NOAA 1991–2020 normals, Valley Of Fire Sp station).

How hot do summers get in Overton, NV?

The average high peaks at 105 °F in July, with about 144 days a year at 90 °F or more.

What kind of soil does 89040 have?

The USDA soil survey maps St. Thomas at the center of ZIP 89040: extremely stony fine sandy loam, well drained, pH about 8.2 (alkaline).

Did spring come early in Overton, NV in 2026?

Spring leaf-out near 89040 came on Jan 28 in 2026, about the same as the 1991–2020 average (Jan 30), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Overton, NV?

Intermediate onions: the longest day near 89040 is 14 h 38 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 89040 change?

Yes. The 2012 USDA map put 89040 in zone 9a; the 2023 map puts it in zone 9b. The newer map uses 1991–2020 data and more weather stations.