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

Planting zone for 84766 — Sevier, UT

ZIP code 84766 (Sevier, Sevier County) is in USDA zone 6a: the coldest winter night averages −10 to −5 °F. The median last spring frost is June 4 and the first fall frost September 21.

Where ZIP 84766 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 frostJun 4

First frostSep 21

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 Sevier, 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 Sevier, UT

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostJune 4median — 50% chance of a later frost

Safe for tender plantsJune 21only 10% chance of frost after

First fall frostSeptember 21median — 10% chance by Sep 6

Growing season106 daysfrost-free, median

A hard freeze (28 °F) usually ends around May 19 and returns around September 29.

From the NOAA station Fremont Indian Sp, UT — within 1 mile, elevation 5,919 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 84766

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Apr 23 – May 7

SpinachSow outdoors · Apr 23 – May 14

Broccoli, cabbageStart indoors · Mar 26 – Apr 9

Broccoli, cabbageTransplant · May 14 – May 28

Onion setsPlant outdoors · May 7 – May 21

PotatoesPlant outdoors · May 14 – May 28

LettuceSow outdoors · May 7 – May 21

Carrots, beetsSow outdoors · May 14 – May 28

TomatoesStart indoors · Apr 9 – Apr 23

TomatoesTransplant · Jun 11 – Jun 25

Peppers, eggplantStart indoors · Mar 26 – Apr 9

Peppers, eggplantTransplant · Jun 18 – Jul 2

BeansSow outdoors · Jun 11 – Jun 25

Sweet cornSow outdoors · Jun 11 – Jun 25

Cucumbers, squashSow outdoors · Jun 11 – Jun 25

Fall lettuce, spinachSow outdoors · Jul 27 – Aug 10

GarlicPlant cloves · Sep 7 – Oct 12

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Jun 4) and first fall frost (Sep 21) 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 84766 came on Mar 16 — 17 days earlier than the 1991–2020 average (Apr 2).

average
Apr 22026
Mar 16

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 Sevier, UT.

Soil in Sevier, UT

The soil mapped at the center of ZIP 84766 is Haploxerolls — very gravelly loam, well drained.

TextureVery gravelly loama good balance for most vegetables

pH6.8neutral; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter3%moderate

Hydrologic groupDwater soaks in very slowly

Farmland classNot prime farmlandUSDA classification

Map unit: Rock outcrop-Haploxerolls-Argixerolls complex, 10 to 55 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 84766; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Sevier, UT

Summer high90 °Faverage high, July

Winter low12 °Faverage low, January

Hot days45days a year at 90 °F or more

Freezing nights207nights a year at 32 °F or less

Growing degree days2,134base 50 °F — the season’s usable heat

Longest day14 h 52 mindaylight on June 21

Shortest day9 h 28 mindaylight on December 21

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

Precipitation12.1 inper year, rain and melted snow

Snowfall45 inper year

Average high and low, by month

Precipitation by month inches · ❄ = snowfall

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Fremont Indian Sp, UT (within 1 mile); precipitation: Fremont Indian Sp, UT (within 1 mile). Daylight is calculated from latitude.

Nearby ZIP codes

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

Marysvale, UT · 14 mi

846446b

Meadow, UT · 17 mi

847116a

Annabella, UT · 18 mi

847306a

Glenwood, UT · 20 mi

Utah planting zones →

Questions about 84766

What planting zone is ZIP code 84766?

ZIP code 84766 (Sevier, 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 Sevier, UT?

The median last spring frost (32 °F) near 84766 is June 4; after June 21 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Fremont Indian Sp station.

When is the first frost in Sevier, UT?

The median first fall frost near 84766 is September 21, giving a median frost-free growing season of 106 days.

When should I plant tomatoes in 84766?

Start tomato seeds indoors around Apr 9 – Apr 23 and set transplants outside around Jun 11 – Jun 25, one to three weeks after the median last frost.

How much rain and snow does 84766 get?

About 12.1 inches of precipitation a year and 45 inches of snowfall (NOAA 1991–2020 normals, Fremont Indian Sp station).

How hot do summers get in Sevier, UT?

The average high peaks at 90 °F in July, with about 45 days a year at 90 °F or more.

What kind of soil does 84766 have?

The USDA soil survey maps Haploxerolls at the center of ZIP 84766: very gravelly loam, well drained, pH about 6.8 (neutral).

Did spring come early in Sevier, UT in 2026?

Spring leaf-out near 84766 came on Mar 16 in 2026, 17 days earlier than the 1991–2020 average (Apr 2), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Sevier, UT?

Intermediate onions: the longest day near 84766 is 14 h 52 min, so day-neutral types bulb best; long-day varieties may not bulb fully.