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

Planting zone for 83341 — Kimberly, ID

ZIP code 83341 (Kimberly, Twin Falls 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 October 4.

Where ZIP 83341 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 frostOct 4

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 Kimberly, 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 Kimberly, ID

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 28only 10% chance of frost after

First fall frostOctober 4median — 10% chance by Sep 20

Growing season147 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 25 and returns around October 15.

From the NOAA station Twin Falls Sun Vly Regional Airport, ID — 7 miles away, elevation 4,150 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 83341

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 9 – Aug 23

GarlicPlant cloves · Sep 20 – Oct 25

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 9) and first fall frost (Oct 4) 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 83341 came on Mar 6 — 25 days earlier than the 1991–2020 average (Mar 31).

average
Mar 312026
Mar 6

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 6b in Idaho

570 plants native to the lower 48 states, recorded in Idaho, and rated by the USDA to survive −5 °F or colder — the bottom of zone 6b. 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 Kimberly, ID.

Soil in Kimberly, ID

The soil mapped at the center of ZIP 83341 is Chuska — gravelly loam, well drained.

TextureGravelly loama good balance for most vegetables

pH8.2alkaline; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter1.5%low — add compost

Hydrologic groupDwater soaks in very slowly

Farmland classFarmland of statewide importance, if irrigatedUSDA classification

Map unit: Chuska gravelly loam, 2 to 12 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 83341; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Kimberly, ID

Summer high88 °Faverage high, July

Winter low20 °Faverage low, December

Hot days42days a year at 90 °F or more

Freezing nights139nights a year at 32 °F or less

Growing degree days2,521base 50 °F — the season’s usable heat

Longest day15 h 18 mindaylight on June 21

Shortest day9 h 04 mindaylight on December 21

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

Precipitation10.3 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: Twin Falls Sun Vly Regional Airport, ID (7 mi away); precipitation: Twin Falls Sun Vly Regional Airport, ID (7 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

833346b

Hansen, ID · 4 mi

833016b

Twin Falls, ID · 8 mi

833036b

Twin Falls, ID · 10 mi

Idaho planting zones →

Questions about 83341

What planting zone is ZIP code 83341?

ZIP code 83341 (Kimberly, ID) 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 Kimberly, ID?

The median last spring frost (32 °F) near 83341 is May 9; after May 28 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Twin Falls Sun Vly Regional Airport station.

When is the first frost in Kimberly, ID?

The median first fall frost near 83341 is October 4, giving a median frost-free growing season of 147 days.

When should I plant tomatoes in 83341?

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 83341 get?

About 10.3 inches of precipitation a year (NOAA 1991–2020 normals, Twin Falls Sun Vly Regional Airport station).

How hot do summers get in Kimberly, ID?

The average high peaks at 88 °F in July, with about 42 days a year at 90 °F or more.

What kind of soil does 83341 have?

The USDA soil survey maps Chuska at the center of ZIP 83341: gravelly loam, well drained, pH about 8.2 (alkaline).

Did spring come early in Kimberly, ID in 2026?

Spring leaf-out near 83341 came on Mar 6 in 2026, 25 days earlier than the 1991–2020 average (Mar 31), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Kimberly, ID?

Long-day onions: the longest day near 83341 is 15 h 18 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).