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

Planting zone for 83435 — Monteview, ID

ZIP code 83435 (Monteview, Jefferson County) is in USDA zone 4b: the coldest winter night averages −25 to −20 °F. The median last spring frost is June 12 and the first fall frost September 7.

Where ZIP 83435 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.

Zone4b−25 to −20 °F

Coldest night−31.7 to −28.9 °C

Last frostJun 12

First frostSep 7

2012 zone4b

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 4b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Monteview, 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 Monteview, ID

JanFebMarAprMayJunJulAugSepOctNovDec

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

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

Safe for tender plantsJune 30only 10% chance of frost after

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

Growing season87 daysfrost-free, median

A hard freeze (28 °F) usually ends around May 18 and returns around September 19.

From the NOAA station Monteview, ID — 4 miles away, elevation 4,817 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 83435

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · May 1 – May 15

SpinachSow outdoors · May 1 – May 22

Broccoli, cabbageStart indoors · Apr 3 – Apr 17

Broccoli, cabbageTransplant · May 22 – Jun 5

Onion setsPlant outdoors · May 15 – May 29

PotatoesPlant outdoors · May 22 – Jun 5

LettuceSow outdoors · May 15 – May 29

Carrots, beetsSow outdoors · May 22 – Jun 5

TomatoesStart indoors · Apr 17 – May 1

TomatoesTransplant · Jun 19 – Jul 3

Peppers, eggplantStart indoors · Apr 3 – Apr 17

Peppers, eggplantTransplant · Jun 26 – Jul 10

BeansSow outdoors · Jun 19 – Jul 3

Sweet cornSow outdoors · Jun 19 – Jul 3

Cucumbers, squashSow outdoors · Jun 19 – Jul 3

Fall lettuce, spinachSow outdoors · Jul 13 – Jul 27

GarlicPlant cloves · Aug 24 – Sep 28

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Jun 12) and first fall frost (Sep 7) 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 83435 came on Apr 1 — 18 days earlier than the 1991–2020 average (Apr 19).

average
Apr 192026
Apr 1

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 4b in Idaho

478 plants native to the lower 48 states, recorded in Idaho, and rated by the USDA to survive −25 °F or colder — the bottom of zone 4b. 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 Monteview, ID.

Soil in Monteview, ID

The soil mapped at the center of ZIP 83435 is Terreton — silty clay loam, well drained.

TextureSilty clay loamholds water and nutrients; slow to drain and warm up

pH8.2alkaline; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter0.75%low — add compost

Hydrologic groupDwater soaks in very slowly

Farmland classFarmland of statewide importance, if irrigatedUSDA classification

Map unit: Terreton silty clay loam.

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 83435; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Monteview, ID

Summer high85 °Faverage high, August

Winter low5 °Faverage low, January

Hot days16days a year at 90 °F or more

Freezing nights209nights a year at 32 °F or less

Growing degree days1,616base 50 °F — the season’s usable heat

Longest day15 h 29 mindaylight on June 21

Shortest day8 h 53 mindaylight on December 21

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

Precipitation10.2 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: Monteview, ID (4 mi away); precipitation: Monteview, ID (4 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

Lewisville, ID · 34 mi

Idaho planting zones →

Questions about 83435

What planting zone is ZIP code 83435?

ZIP code 83435 (Monteview, ID) is in USDA hardiness zone 4b on the 2023 map: the coldest night of an average winter reaches −25 to −20 °F (−31.7 to −28.9 °C).

When is the last frost in Monteview, ID?

The median last spring frost (32 °F) near 83435 is June 12; after June 30 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Monteview station.

When is the first frost in Monteview, ID?

The median first fall frost near 83435 is September 7, giving a median frost-free growing season of 87 days.

When should I plant tomatoes in 83435?

Start tomato seeds indoors around Apr 17 – May 1 and set transplants outside around Jun 19 – Jul 3, one to three weeks after the median last frost.

How much rain and snow does 83435 get?

About 10.2 inches of precipitation a year (NOAA 1991–2020 normals, Monteview station).

How hot do summers get in Monteview, ID?

The average high peaks at 85 °F in August, with about 16 days a year at 90 °F or more.

What kind of soil does 83435 have?

The USDA soil survey maps Terreton at the center of ZIP 83435: silty clay loam, well drained, pH about 8.2 (alkaline).

Did spring come early in Monteview, ID in 2026?

Spring leaf-out near 83435 came on Apr 1 in 2026, 18 days earlier than the 1991–2020 average (Apr 19), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Monteview, ID?

Long-day onions: the longest day near 83435 is 15 h 29 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).