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

Planting zone for 84523 — Ferron, UT

ZIP code 84523 (Ferron, Emery County) is in USDA zone 6b: the coldest winter night averages −5 to 0 °F. The median last spring frost is May 6 and the first fall frost October 10.

Where ZIP 84523 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 6
First frostOct 10
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 Ferron, 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 Ferron, UT

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMay 6median — 50% chance of a later frost
Safe for tender plantsMay 27only 10% chance of frost after
First fall frostOctober 10median — 10% chance by Sep 28
Growing season156 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 23 and returns around October 19.

From the NOAA station Ferron, UT — 5 miles away, elevation 5,922 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 84523

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 25 – Apr 8
SpinachSow outdoors · Mar 25 – Apr 15
Broccoli, cabbageStart indoors · Feb 25 – Mar 11
Broccoli, cabbageTransplant · Apr 15 – Apr 29
Onion setsPlant outdoors · Apr 8 – Apr 22
PotatoesPlant outdoors · Apr 15 – Apr 29
LettuceSow outdoors · Apr 8 – Apr 22
Carrots, beetsSow outdoors · Apr 15 – Apr 29
TomatoesStart indoors · Mar 11 – Mar 25
TomatoesTransplant · May 13 – May 27
Peppers, eggplantStart indoors · Feb 25 – Mar 11
Peppers, eggplantTransplant · May 20 – Jun 3
BeansSow outdoors · May 13 – May 27
Sweet cornSow outdoors · May 13 – May 27
Cucumbers, squashSow outdoors · May 13 – May 27
Fall lettuce, spinachSow outdoors · Aug 15 – Aug 29
GarlicPlant cloves · Sep 26 – Oct 31
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 6) and first fall frost (Oct 10) 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 84523 came on Mar 23 — 26 days earlier than the 1991–2020 average (Apr 18).

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 Utah

549 plants native to the lower 48 states, recorded in Utah, and rated by the USDA to survive −5 °F or colder — the bottom of zone 6b. Each links to its USDA PLANTS profile.

Trees 30

American beech80 ft · blooms mid spring · low shade tolerance · to −44 °FArizona cypress50 ft · blooms spring · low shade tolerance · to −23 °FArizona walnut50 ft · blooms late spring · high shade tolerance · to −33 °Fbalsam poplar80 ft · blooms late spring · high shade tolerance · to −79 °Fblack locust60 ft · blooms spring · high shade tolerance · to −37 °Fblack walnut100 ft · blooms late spring · high shade tolerance · to −28 °F

Shrubs 107

alderleaf buckthorn3 ft · blooms late spring · low shade tolerance · to −33 °Falderleaf mountain mahogany15 ft · blooms late spring · medium shade tolerance · to −41 °Falpine laurel1 ft · blooms late spring · low shade tolerance · to −28 °FAmerican plum24 ft · blooms mid spring · high shade tolerance · to −38 °Fantelope bitterbrush6 ft · blooms early spring · medium shade tolerance · to −36 °FApache plume6 ft · blooms late spring · high shade tolerance · to −23 °F

Wildflowers & perennials 251

alkali buttercup1 ft · blooms late spring · low shade tolerance · to −38 °Falpine bistort1 ft · blooms mid spring · high shade tolerance · to −38 °Falpine mountainsorrel1 ft · blooms mid summer · medium shade tolerance · to −43 °FAmerican alpine speedwell1 ft · blooms summer · medium shade tolerance · to −28 °FAmerican bistort1.5 ft · blooms mid spring · high shade tolerance · to −38 °FAmerican licorice4 ft · blooms late spring · medium shade tolerance · to −38 °F

Grasses 151

alkali cordgrass3 ft · blooms late summer · high shade tolerance · to −38 °Falkali sacaton3 ft · blooms mid summer · high shade tolerance · to −38 °FAlpine Meadow-Foxtail0.5 ft · blooms mid spring · medium shade tolerance · to −33 °Falpine timothy1.4 ft · blooms late spring · medium shade tolerance · to −43 °Fanalogue sedge1.5 ft · blooms late spring · medium shade tolerance · to −38 °Farctic bluegrass2 ft · high shade tolerance · to −62 °F

Vines 3

trumpet creeper2 ft · blooms summer · high shade tolerance · to −13 °FVirginia creeper1 ft · blooms late spring · medium shade tolerance · to −28 °Fwestern white clematis1 ft · blooms mid summer · medium shade tolerance · to −38 °F

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 Ferron, UT.

Soil in Ferron, UT

The soil mapped at the center of ZIP 84523 is Andok family — very gravelly loam, well drained.

TextureVery gravelly loama good balance for most vegetables
pH7.8slightly alkaline; 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: Andok-Welring families-Rock outcrop complex, 50 to 80 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 84523; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Ferron, UT

Summer high89 °Faverage high, July
Winter low14 °Faverage low, January
Hot days39days a year at 90 °F or more
Freezing nights160nights a year at 32 °F or less
Growing degree days2,871base 50 °F — the season’s usable heat
Longest day14 h 55 mindaylight on June 21
Shortest day9 h 25 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation8.6 inper year, rain and melted snow
Snowfall25 inper year; 42 days with snow on the ground

Average high and low, by month

0°10°20°30°40°50°60°70°80°90°100°32 °FJanuary: average high 37 °F, low 14 °F 37°14° JanFebruary: average high 43 °F, low 20 °F 43°20° FebMarch: average high 54 °F, low 29 °F 54°29° MarApril: average high 62 °F, low 35 °F 62°35° AprMay: average high 71 °F, low 45 °F 71°45° MayJune: average high 83 °F, low 54 °F 83°54° JunJuly: average high 89 °F, low 60 °F 89°60° JulAugust: average high 86 °F, low 58 °F 86°58° AugSeptember: average high 78 °F, low 49 °F 78°49° SepOctober: average high 65 °F, low 37 °F 65°37° OctNovember: average high 49 °F, low 25 °F 49°25° NovDecember: average high 37 °F, low 15 °F 37°15° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″January: 0.65 in precipitation, 7 in snowfall 0.7❄7 JanFebruary: 0.62 in precipitation, 6.1 in snowfall 0.6❄6 FebMarch: 0.60 in precipitation, 2.5 in snowfall 0.6❄3 MarApril: 0.46 in precipitation, 1.4 in snowfall 0.5❄1 AprMay: 0.85 in precipitation, 0.2 in snowfall 0.8 MayJune: 0.49 in precipitation 0.5 JunJuly: 0.88 in precipitation 0.9 JulAugust: 0.85 in precipitation 0.8 AugSeptember: 1.13 in precipitation 1.1 SepOctober: 1.02 in precipitation, 0.3 in snowfall 1.0 OctNovember: 0.50 in precipitation, 2.1 in snowfall 0.5❄2 NovDecember: 0.56 in precipitation, 5 in snowfall 0.6❄5 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Ferron, UT (5 mi away); precipitation: Ferron, UT (5 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.

845166a
Clawson, UT · 10 mi
845226b
Emery, UT · 14 mi
845376a
Orangeville, UT · 17 mi
845136a
Castle Dale, UT · 18 mi
846426a
Manti, UT · 22 mi
846656a
Sterling, UT · 23 mi
845286a
Huntington, UT · 25 mi
846436a
Mayfield, UT · 25 mi

Utah planting zones →

Questions about 84523

What planting zone is ZIP code 84523?

ZIP code 84523 (Ferron, UT) 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 Ferron, UT?

The median last spring frost (32 °F) near 84523 is May 6; after May 27 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Ferron station.

When is the first frost in Ferron, UT?

The median first fall frost near 84523 is October 10, giving a median frost-free growing season of 156 days.

When should I plant tomatoes in 84523?

Start tomato seeds indoors around Mar 11 – Mar 25 and set transplants outside around May 13 – May 27, one to three weeks after the median last frost.

How much rain and snow does 84523 get?

About 8.6 inches of precipitation a year and 25 inches of snowfall (NOAA 1991–2020 normals, Ferron station).

How hot do summers get in Ferron, UT?

The average high peaks at 89 °F in July, with about 39 days a year at 90 °F or more.

What kind of soil does 84523 have?

The USDA soil survey maps Andok family at the center of ZIP 84523: very gravelly loam, well drained, pH about 7.8 (slightly alkaline).

Did spring come early in Ferron, UT in 2026?

Spring leaf-out near 84523 came on Mar 23 in 2026, 26 days earlier than the 1991–2020 average (Apr 18), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Ferron, UT?

Intermediate onions: the longest day near 84523 is 14 h 55 min, so day-neutral types bulb best; long-day varieties may not bulb fully.