Data: 2023 USDA zones (PRISM/OSU) · NOAA 1991–2020 normals · updated Oct 30, 2026

Planting zone for 84712 — Antimony, UT

ZIP code 84712 (Antimony, Garfield County) is in USDA zone 5b: the coldest winter night averages −15 to −10 °F. The median last spring frost is June 17 and the first fall frost September 12.

Where ZIP 84712 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 frostJun 17

First frostSep 12

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 Antimony, 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 Antimony, UT

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostJune 17median — 50% chance of a later frost

Safe for tender plantsJuly 3only 10% chance of frost after

First fall frostSeptember 12median — 10% chance by Aug 30

Growing season85 daysfrost-free, median

A hard freeze (28 °F) usually ends around May 31 and returns around September 23.

From the NOAA station Angle, UT — 8 miles away, elevation 6,411 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 84712

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · May 6 – May 20

SpinachSow outdoors · May 6 – May 27

Broccoli, cabbageStart indoors · Apr 8 – Apr 22

Broccoli, cabbageTransplant · May 27 – Jun 10

Onion setsPlant outdoors · May 20 – Jun 3

PotatoesPlant outdoors · May 27 – Jun 10

LettuceSow outdoors · May 20 – Jun 3

Carrots, beetsSow outdoors · May 27 – Jun 10

TomatoesStart indoors · Apr 22 – May 6

TomatoesTransplant · Jun 24 – Jul 8

Peppers, eggplantStart indoors · Apr 8 – Apr 22

Peppers, eggplantTransplant · Jul 1 – Jul 15

BeansSow outdoors · Jun 24 – Jul 8

Sweet cornSow outdoors · Jun 24 – Jul 8

Cucumbers, squashSow outdoors · Jun 24 – Jul 8

Fall lettuce, spinachSow outdoors · Jul 18 – Aug 1

GarlicPlant cloves · Aug 29 – Oct 3

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Jun 17) and first fall frost (Sep 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 84712 came on Mar 20 — 24 days earlier than the 1991–2020 average (Apr 13).

average
Apr 132026
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 5b in Utah

517 plants native to the lower 48 states, recorded in Utah, 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 Antimony, UT.

Soil in Antimony, UT

The soil mapped at the center of ZIP 84712 is Bruman — very cobbly loam, well drained.

TextureVery cobbly loama good balance for most vegetables

pH8.2alkaline; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter0.75%low — add compost

Hydrologic groupBwater soaks in moderately

Farmland classNot prime farmlandUSDA classification

Map unit: Bruman very cobbly loam, 30 to 50 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 84712; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Antimony, UT

Summer high85 °Faverage high, July

Winter low6 °Faverage low, December

Hot days15days a year at 90 °F or more

Freezing nights228nights a year at 32 °F or less

Growing degree days1,521base 50 °F — the season’s usable heat

Longest day14 h 49 mindaylight on June 21

Shortest day9 h 31 mindaylight on December 21

Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully

Precipitation9.2 inper year, rain and melted snow

Snowfall20 inper year

Average high and low, by month

Precipitation by month inches · ❄ = snowfall

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Angle, UT (8 mi away); precipitation: Angle, UT (8 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

847435b

Kingston, UT · 12 mi

847235b

Circleville, UT · 15 mi

847406a

Junction, UT · 19 mi

847325b

Greenwich, UT · 22 mi

847506a

Marysvale, UT · 24 mi

Panguitch, UT · 27 mi

Utah planting zones →

Questions about 84712

What planting zone is ZIP code 84712?

ZIP code 84712 (Antimony, UT) 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 Antimony, UT?

The median last spring frost (32 °F) near 84712 is June 17; after July 3 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Angle station.

When is the first frost in Antimony, UT?

The median first fall frost near 84712 is September 12, giving a median frost-free growing season of 85 days.

When should I plant tomatoes in 84712?

Start tomato seeds indoors around Apr 22 – May 6 and set transplants outside around Jun 24 – Jul 8, one to three weeks after the median last frost.

How much rain and snow does 84712 get?

About 9.2 inches of precipitation a year and 20 inches of snowfall (NOAA 1991–2020 normals, Angle station).

How hot do summers get in Antimony, UT?

The average high peaks at 85 °F in July, with about 15 days a year at 90 °F or more.

What kind of soil does 84712 have?

The USDA soil survey maps Bruman at the center of ZIP 84712: very cobbly loam, well drained, pH about 8.2 (alkaline).

Did spring come early in Antimony, UT in 2026?

Spring leaf-out near 84712 came on Mar 20 in 2026, 24 days earlier than the 1991–2020 average (Apr 13), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Antimony, UT?

Intermediate onions: the longest day near 84712 is 14 h 49 min, so day-neutral types bulb best; long-day varieties may not bulb fully.