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

Planting zone for 83469 — Shoup, ID

ZIP code 83469 (Shoup, Lemhi County) is in USDA zone 5b: the coldest winter night averages −15 to −10 °F. The median last spring frost is May 11 and the first fall frost September 30.

Where ZIP 83469 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.

Zone5b−15 to −10 °F

Coldest night−26.1 to −23.3 °C

Last frostMay 11

First frostSep 30

2012 zone5b

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 5b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Shoup, 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 Shoup, ID

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostMay 11median — 50% chance of a later frost

Safe for tender plantsJune 1only 10% chance of frost after

First fall frostSeptember 30median — 10% chance by Sep 15

Growing season140 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 23 and returns around October 14.

From the NOAA station Taylor Rch, ID — 22 miles away, elevation 3,835 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 83469

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Mar 30 – Apr 13

SpinachSow outdoors · Mar 30 – Apr 20

Broccoli, cabbageStart indoors · Mar 2 – Mar 16

Broccoli, cabbageTransplant · Apr 20 – May 4

Onion setsPlant outdoors · Apr 13 – Apr 27

PotatoesPlant outdoors · Apr 20 – May 4

LettuceSow outdoors · Apr 13 – Apr 27

Carrots, beetsSow outdoors · Apr 20 – May 4

TomatoesStart indoors · Mar 16 – Mar 30

TomatoesTransplant · May 18 – Jun 1

Peppers, eggplantStart indoors · Mar 2 – Mar 16

Peppers, eggplantTransplant · May 25 – Jun 8

BeansSow outdoors · May 18 – Jun 1

Sweet cornSow outdoors · May 18 – Jun 1

Cucumbers, squashSow outdoors · May 18 – Jun 1

Fall lettuce, spinachSow outdoors · Aug 5 – Aug 19

GarlicPlant cloves · Sep 16 – Oct 21

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 11) and first fall frost (Sep 30) 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 83469 came on May 2 — 13 days earlier than the 1991–2020 average (May 15).

average
May 152026
May 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 5b in Idaho

553 plants native to the lower 48 states, recorded in Idaho, and rated by the USDA to survive −15 °F or colder — the bottom of zone 5b. 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 Shoup, ID.

Soil in Shoup, ID

The soil mapped at the center of ZIP 83469 is Middlehill family — 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 groupBwater soaks in moderately

Farmland classNot prime farmlandUSDA classification

Map unit: Middlehill family, very stony surface-Lostbasin family, rubbly surface-Kyway family, stony surface, complex, 15 to 75 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 83469; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Shoup, ID

Summer high88 °Faverage high, July

Winter low16 °Faverage low, January

Hot days34days a year at 90 °F or more

Freezing nights183nights a year at 32 °F or less

Growing degree days2,029base 50 °F — the season’s usable heat

Longest day15 h 38 mindaylight on June 21

Shortest day8 h 45 mindaylight on December 21

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

Precipitation24.1 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: Taylor Rch, ID (22 mi away); precipitation: Morgan Creek, ID (17 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

North Fork, ID · 30 mi

Gibbonsville, ID · 40 mi

834655b

Lemhi, ID · 41 mi

Idaho planting zones →

Questions about 83469

What planting zone is ZIP code 83469?

ZIP code 83469 (Shoup, ID) is in USDA hardiness zone 5b on the 2023 map: the coldest night of an average winter reaches −15 to −10 °F (−26.1 to −23.3 °C).

When is the last frost in Shoup, ID?

The median last spring frost (32 °F) near 83469 is May 11; after June 1 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Taylor Rch station.

When is the first frost in Shoup, ID?

The median first fall frost near 83469 is September 30, giving a median frost-free growing season of 140 days.

When should I plant tomatoes in 83469?

Start tomato seeds indoors around Mar 16 – Mar 30 and set transplants outside around May 18 – Jun 1, one to three weeks after the median last frost.

How much rain and snow does 83469 get?

About 24.1 inches of precipitation a year (NOAA 1991–2020 normals, Morgan Creek station).

How hot do summers get in Shoup, ID?

The average high peaks at 88 °F in July, with about 34 days a year at 90 °F or more.

What kind of soil does 83469 have?

The USDA soil survey maps Middlehill family at the center of ZIP 83469: slightly decomposed plant material, well drained, pH about 5.0 (strongly acidic).

Did spring come early in Shoup, ID in 2026?

Spring leaf-out near 83469 came on May 2 in 2026, 13 days earlier than the 1991–2020 average (May 15), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Shoup, ID?

Long-day onions: the longest day near 83469 is 15 h 38 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).