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

Planting zone for 83524 — Culdesac, ID

ZIP code 83524 (Culdesac, Nez Perce County) is in USDA zone 7a: the coldest winter night averages 0 to 5 °F. The median last spring frost is May 23 and the first fall frost September 25.

Where ZIP 83524 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 23

First frostSep 25

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 Culdesac, ID…

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 Culdesac, ID

JanFebMarAprMayJunJulAugSepOctNovDec

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

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

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

First fall frostSeptember 25median — 10% chance by Sep 7

Growing season121 daysfrost-free, median

A hard freeze (28 °F) usually ends around May 2 and returns around October 9.

From the NOAA station Winchester, ID — 8 miles away, elevation 3,973 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 83524

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Apr 11 – Apr 25

SpinachSow outdoors · Apr 11 – May 2

Broccoli, cabbageStart indoors · Mar 14 – Mar 28

Broccoli, cabbageTransplant · May 2 – May 16

Onion setsPlant outdoors · Apr 25 – May 9

PotatoesPlant outdoors · May 2 – May 16

LettuceSow outdoors · Apr 25 – May 9

Carrots, beetsSow outdoors · May 2 – May 16

TomatoesStart indoors · Mar 28 – Apr 11

TomatoesTransplant · May 30 – Jun 13

Peppers, eggplantStart indoors · Mar 14 – Mar 28

Peppers, eggplantTransplant · Jun 6 – Jun 20

BeansSow outdoors · May 30 – Jun 13

Sweet cornSow outdoors · May 30 – Jun 13

Cucumbers, squashSow outdoors · May 30 – Jun 13

Fall lettuce, spinachSow outdoors · Jul 31 – Aug 14

GarlicPlant cloves · Sep 11 – Oct 16

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 23) and first fall frost (Sep 25) 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 83524 came on Mar 18 — 22 days earlier than the 1991–2020 average (Apr 9).

average
Apr 92026
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).

Native plants for zone 7a in Idaho

575 plants native to the lower 48 states, recorded in Idaho, 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 Culdesac, ID.

Soil in Culdesac, ID

The soil mapped at the center of ZIP 83524 is Klickson — slightly decomposed plant material, well drained.

TextureSlightly decomposed plant materialtop layer

pH5.0strongly acidic; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter75%high

Hydrologic groupCwater soaks in slowly

Farmland classNot prime farmlandUSDA classification

Map unit: Klickson-Hooverton association, 35 to 90 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 83524; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Culdesac, ID

Summer high79 °Faverage high, August

Winter low22 °Faverage low, December

Hot days5days a year at 90 °F or more

Freezing nights171nights a year at 32 °F or less

Growing degree days1,369base 50 °F — the season’s usable heat

Longest day15 h 48 mindaylight on June 21

Shortest day8 h 35 mindaylight on December 21

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

Precipitation21.8 inper year, rain and melted snow

Snowfall87 inper year; 90 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: Winchester, ID (8 mi away); precipitation: Winchester, ID (8 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

Craigmont, ID · 12 mi

835417a

Lenore, ID · 12 mi

835357b

Juliaetta, ID · 13 mi

835017b

Lewiston, ID · 15 mi

835266a

Ferdinand, ID · 18 mi

Idaho planting zones →

Questions about 83524

What planting zone is ZIP code 83524?

ZIP code 83524 (Culdesac, ID) 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 Culdesac, ID?

The median last spring frost (32 °F) near 83524 is May 23; after June 19 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Winchester station.

When is the first frost in Culdesac, ID?

The median first fall frost near 83524 is September 25, giving a median frost-free growing season of 121 days.

When should I plant tomatoes in 83524?

Start tomato seeds indoors around Mar 28 – Apr 11 and set transplants outside around May 30 – Jun 13, one to three weeks after the median last frost.

How much rain and snow does 83524 get?

About 21.8 inches of precipitation a year and 87 inches of snowfall (NOAA 1991–2020 normals, Winchester station).

How hot do summers get in Culdesac, ID?

The average high peaks at 79 °F in August, with about 5 days a year at 90 °F or more.

What kind of soil does 83524 have?

The USDA soil survey maps Klickson at the center of ZIP 83524: slightly decomposed plant material, well drained, pH about 5.0 (strongly acidic).

Did spring come early in Culdesac, ID in 2026?

Spring leaf-out near 83524 came on Mar 18 in 2026, 22 days earlier than the 1991–2020 average (Apr 9), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Culdesac, ID?

Long-day onions: the longest day near 83524 is 15 h 48 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).