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

Planting zone for 84327 — Newton, UT

ZIP code 84327 (Newton, Cache County) is in USDA zone 6a: the coldest winter night averages −10 to −5 °F. The median last spring frost is May 3 and the first fall frost October 12.

Where ZIP 84327 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.

Zone6a−10 to −5 °F

Coldest night−23.3 to −20.6 °C

Last frostMay 3

First frostOct 12

2012 zone6a

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 6a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Newton, UT…

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 Newton, UT

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostMay 3median — 50% chance of a later frost

Safe for tender plantsMay 24only 10% chance of frost after

First fall frostOctober 12median — 10% chance by Sep 27

Growing season160 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 19 and returns around October 24.

From the NOAA station Cutler Dam, UT — 4 miles away, elevation 4,292 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 84327

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Mar 22 – Apr 5

SpinachSow outdoors · Mar 22 – Apr 12

Broccoli, cabbageStart indoors · Feb 22 – Mar 8

Broccoli, cabbageTransplant · Apr 12 – Apr 26

Onion setsPlant outdoors · Apr 5 – Apr 19

PotatoesPlant outdoors · Apr 12 – Apr 26

LettuceSow outdoors · Apr 5 – Apr 19

Carrots, beetsSow outdoors · Apr 12 – Apr 26

TomatoesStart indoors · Mar 8 – Mar 22

TomatoesTransplant · May 10 – May 24

Peppers, eggplantStart indoors · Feb 22 – Mar 8

Peppers, eggplantTransplant · May 17 – May 31

BeansSow outdoors · May 10 – May 24

Sweet cornSow outdoors · May 10 – May 24

Cucumbers, squashSow outdoors · May 10 – May 24

Fall lettuce, spinachSow outdoors · Aug 17 – Aug 31

GarlicPlant cloves · Sep 28 – Nov 2

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 3) and first fall frost (Oct 12) 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 84327 came on Mar 20 — 19 days earlier than the 1991–2020 average (Apr 8).

average
Apr 82026
Mar 20

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 6a in Utah

546 plants native to the lower 48 states, recorded in Utah, and rated by the USDA to survive −10 °F or colder — the bottom of zone 6a. 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 Newton, UT.

Soil in Newton, UT

The soil mapped at the center of ZIP 84327 is Crookston — loam, well drained.

TextureLoama good balance for most vegetables

pH7.6slightly alkaline; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter2.5%moderate

Hydrologic groupBwater soaks in moderately

Farmland classPrime farmland if irrigatedUSDA classification

Map unit: CROOKSTON LOAM, 0 TO 3 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 84327; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Newton, UT

Summer high89 °Faverage high, July

Winter low17 °Faverage low, January

Hot days44days a year at 90 °F or more

Freezing nights130nights a year at 32 °F or less

Growing degree days2,748base 50 °F — the season’s usable heat

Longest day15 h 14 mindaylight on June 21

Shortest day9 h 08 mindaylight on December 21

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

Precipitation16.9 inper year, rain and melted snow

Snowfall39 inper year; 73 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: Cutler Dam, UT (4 mi away); precipitation: Cutler Dam, UT (4 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.

843046a

Cache Junction, UT · 3 mi

843385b

Trenton, UT · 5 mi

843066a

Collinston, UT · 6 mi

843056a

Clarkston, UT · 6 mi

843356a

Smithfield, UT · 7 mi

Utah planting zones →

Questions about 84327

What planting zone is ZIP code 84327?

ZIP code 84327 (Newton, UT) is in USDA hardiness zone 6a on the 2023 map: the coldest night of an average winter reaches −10 to −5 °F (−23.3 to −20.6 °C).

When is the last frost in Newton, UT?

The median last spring frost (32 °F) near 84327 is May 3; after May 24 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Cutler Dam station.

When is the first frost in Newton, UT?

The median first fall frost near 84327 is October 12, giving a median frost-free growing season of 160 days.

When should I plant tomatoes in 84327?

Start tomato seeds indoors around Mar 8 – Mar 22 and set transplants outside around May 10 – May 24, one to three weeks after the median last frost.

How much rain and snow does 84327 get?

About 16.9 inches of precipitation a year and 39 inches of snowfall (NOAA 1991–2020 normals, Cutler Dam station).

How hot do summers get in Newton, UT?

The average high peaks at 89 °F in July, with about 44 days a year at 90 °F or more.

What kind of soil does 84327 have?

The USDA soil survey maps Crookston at the center of ZIP 84327: loam, well drained, pH about 7.6 (slightly alkaline).

Did spring come early in Newton, UT in 2026?

Spring leaf-out near 84327 came on Mar 20 in 2026, 19 days earlier than the 1991–2020 average (Apr 8), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Newton, UT?

Long-day onions: the longest day near 84327 is 15 h 14 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).