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

Planting zone for 84627 — Ephraim, UT

ZIP code 84627 (Ephraim, Sanpete County) is in USDA zone 6a: the coldest winter night averages −10 to −5 °F. The median last spring frost is May 28 and the first fall frost September 20.

Where ZIP 84627 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 28
First frostSep 20
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 Ephraim, 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 Ephraim, UT

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMay 28median — 50% chance of a later frost
Safe for tender plantsJune 15only 10% chance of frost after
First fall frostSeptember 20median — 10% chance by Sep 5
Growing season113 daysfrost-free, median

A hard freeze (28 °F) usually ends around May 12 and returns around September 29.

From the NOAA station Ephraim, UT — within 1 mile, elevation 5,499 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 84627

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Apr 16 – Apr 30
SpinachSow outdoors · Apr 16 – May 7
Broccoli, cabbageStart indoors · Mar 19 – Apr 2
Broccoli, cabbageTransplant · May 7 – May 21
Onion setsPlant outdoors · Apr 30 – May 14
PotatoesPlant outdoors · May 7 – May 21
LettuceSow outdoors · Apr 30 – May 14
Carrots, beetsSow outdoors · May 7 – May 21
TomatoesStart indoors · Apr 2 – Apr 16
TomatoesTransplant · Jun 4 – Jun 18
Peppers, eggplantStart indoors · Mar 19 – Apr 2
Peppers, eggplantTransplant · Jun 11 – Jun 25
BeansSow outdoors · Jun 4 – Jun 18
Sweet cornSow outdoors · Jun 4 – Jun 18
Cucumbers, squashSow outdoors · Jun 4 – Jun 18
Fall lettuce, spinachSow outdoors · Jul 26 – Aug 9
GarlicPlant cloves · Sep 6 – Oct 11
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 28) and first fall frost (Sep 20) 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 84627 came on Mar 18 — 13 days earlier than the 1991–2020 average (Mar 31).

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.

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 248

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 Ephraim, UT.

Soil in Ephraim, UT

The soil mapped at the center of ZIP 84627 is Sigurd — gravelly loam, well drained.

TextureGravelly 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 classFarmland of statewide importanceUSDA classification

Map unit: Sigurd gravelly loam, 1 to 5 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 84627; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Ephraim, UT

Summer high91 °Faverage high, July
Winter low11 °Faverage low, January
Hot days48days a year at 90 °F or more
Freezing nights187nights a year at 32 °F or less
Growing degree days2,267base 50 °F — the season’s usable heat
Longest day14 h 57 mindaylight on June 21
Shortest day9 h 23 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation11.7 inper year, rain and melted snow
Snowfall20 inper year

Average high and low, by month

0°10°20°30°40°50°60°70°80°90°100°32 °FJanuary: average high 36 °F, low 11 °F 36°11° JanFebruary: average high 42 °F, low 17 °F 42°17° FebMarch: average high 54 °F, low 25 °F 54°25° MarApril: average high 61 °F, low 30 °F 61°30° AprMay: average high 71 °F, low 37 °F 71°37° MayJune: average high 83 °F, low 44 °F 83°44° JunJuly: average high 91 °F, low 52 °F 91°52° JulAugust: average high 89 °F, low 50 °F 89°50° AugSeptember: average high 79 °F, low 41 °F 79°41° SepOctober: average high 65 °F, low 30 °F 65°30° OctNovember: average high 51 °F, low 20 °F 51°20° NovDecember: average high 37 °F, low 11 °F 37°11° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″January: 0.90 in precipitation, 4.1 in snowfall 0.9❄4 JanFebruary: 0.96 in precipitation, 2.8 in snowfall 1.0❄3 FebMarch: 1.02 in precipitation, 2.6 in snowfall 1.0❄3 MarApril: 1.11 in precipitation, 0.7 in snowfall 1.1❄1 AprMay: 1.30 in precipitation, 0.1 in snowfall 1.3 MayJune: 0.78 in precipitation 0.8 JunJuly: 0.62 in precipitation 0.6 JulAugust: 0.81 in precipitation 0.8 AugSeptember: 1.08 in precipitation 1.1 SepOctober: 1.08 in precipitation, 0.1 in snowfall 1.1 OctNovember: 0.88 in precipitation, 1.4 in snowfall 0.9❄1 NovDecember: 1.15 in precipitation, 8 in snowfall 1.1❄8 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Ephraim, UT (within 1 mile); precipitation: Ephraim, UT (within 1 mile). 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.

846235b
Chester, UT · 7 mi
846426a
Manti, UT · 7 mi
846626a
Spring City, UT · 8 mi
846675b
Wales, UT · 11 mi
846656a
Sterling, UT · 11 mi
846465b
Moroni, UT · 13 mi
846306b
Fayette, UT · 14 mi
846475b
Mount Pleasant, UT · 15 mi

Utah planting zones →

Questions about 84627

What planting zone is ZIP code 84627?

ZIP code 84627 (Ephraim, 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 Ephraim, UT?

The median last spring frost (32 °F) near 84627 is May 28; after June 15 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Ephraim station.

When is the first frost in Ephraim, UT?

The median first fall frost near 84627 is September 20, giving a median frost-free growing season of 113 days.

When should I plant tomatoes in 84627?

Start tomato seeds indoors around Apr 2 – Apr 16 and set transplants outside around Jun 4 – Jun 18, one to three weeks after the median last frost.

How much rain and snow does 84627 get?

About 11.7 inches of precipitation a year and 20 inches of snowfall (NOAA 1991–2020 normals, Ephraim station).

How hot do summers get in Ephraim, UT?

The average high peaks at 91 °F in July, with about 48 days a year at 90 °F or more.

What kind of soil does 84627 have?

The USDA soil survey maps Sigurd at the center of ZIP 84627: gravelly loam, well drained, pH about 8.2 (alkaline).

Did spring come early in Ephraim, UT in 2026?

Spring leaf-out near 84627 came on Mar 18 in 2026, 13 days earlier than the 1991–2020 average (Mar 31), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Ephraim, UT?

Intermediate onions: the longest day near 84627 is 14 h 57 min, so day-neutral types bulb best; long-day varieties may not bulb fully.