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

Planting zone for 84525 — Green River, UT

ZIP code 84525 (Green River, Emery County) is in USDA zone 6b: the coldest winter night averages −5 to 0 °F. The median last spring frost is April 22 and the first fall frost October 20.

Where ZIP 84525 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 frostApr 22
First frostOct 20
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 Green River, 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 Green River, UT

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 22median — 50% chance of a later frost
Safe for tender plantsMay 8only 10% chance of frost after
First fall frostOctober 20median — 10% chance by Oct 6
Growing season179 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 8 and returns around October 30.

From the NOAA station Moab Canyonland Airport, UT — 34 miles away, elevation 4,561 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 84525

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 11 – Mar 25
SpinachSow outdoors · Mar 11 – Apr 1
Broccoli, cabbageStart indoors · Feb 11 – Feb 25
Broccoli, cabbageTransplant · Apr 1 – Apr 15
Onion setsPlant outdoors · Mar 25 – Apr 8
PotatoesPlant outdoors · Apr 1 – Apr 15
LettuceSow outdoors · Mar 25 – Apr 8
Carrots, beetsSow outdoors · Apr 1 – Apr 15
TomatoesStart indoors · Feb 25 – Mar 11
TomatoesTransplant · Apr 29 – May 13
Peppers, eggplantStart indoors · Feb 11 – Feb 25
Peppers, eggplantTransplant · May 6 – May 20
BeansSow outdoors · Apr 29 – May 13
Sweet cornSow outdoors · Apr 29 – May 13
Cucumbers, squashSow outdoors · Apr 29 – May 13
Fall lettuce, spinachSow outdoors · Aug 25 – Sep 8
GarlicPlant cloves · Oct 6 – Nov 10
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 22) and first fall frost (Oct 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 84525 came on Mar 10 — 11 days earlier than the 1991–2020 average (Mar 21).

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 Green River, UT.

Soil in Green River, UT

The soil mapped at the center of ZIP 84525 is Lazear — 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 matter1%low — add compost
Hydrologic groupDwater soaks in very slowly
Farmland classNot prime farmlandUSDA classification

Map unit: Lazear-Gerst-Pacon complex, 3 to 35 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 84525; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Green River, UT

Summer high96 °Faverage high, July
Winter low17 °Faverage low, January
Hot days84days a year at 90 °F or more
Freezing nights138nights a year at 32 °F or less
Growing degree days3,883base 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
Precipitation7.4 inper year, rain and melted snow
Snowfall5 inper year; 11 days with snow on the ground

Average high and low, by month

10°20°30°40°50°60°70°80°90°100°110°32 °FJanuary: average high 39 °F, low 17 °F 39°17° JanFebruary: average high 47 °F, low 25 °F 47°25° FebMarch: average high 59 °F, low 32 °F 59°32° MarApril: average high 67 °F, low 39 °F 67°39° AprMay: average high 78 °F, low 48 °F 78°48° MayJune: average high 90 °F, low 58 °F 90°58° JunJuly: average high 96 °F, low 66 °F 96°66° JulAugust: average high 93 °F, low 63 °F 93°63° AugSeptember: average high 83 °F, low 53 °F 83°53° SepOctober: average high 68 °F, low 40 °F 68°40° OctNovember: average high 52 °F, low 27 °F 52°27° NovDecember: average high 39 °F, low 17 °F 39°17° Dec

Precipitation by month inches · ❄ = snowfall

0″1″January: 0.63 in precipitation, 2.3 in snowfall 0.6❄2 JanFebruary: 0.63 in precipitation, 0.1 in snowfall 0.6 FebMarch: 0.59 in precipitation, 0.8 in snowfall 0.6❄1 MarApril: 0.54 in precipitation 0.5 AprMay: 0.77 in precipitation 0.8 MayJune: 0.29 in precipitation 0.3 JunJuly: 0.97 in precipitation 1.0 JulAugust: 0.60 in precipitation 0.6 AugSeptember: 0.82 in precipitation 0.8 SepOctober: 0.80 in precipitation 0.8 OctNovember: 0.46 in precipitation, 0.1 in snowfall 0.5 NovDecember: 0.32 in precipitation, 1.5 in snowfall 0.3❄2 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Moab Canyonland Airport, UT (34 mi away); precipitation: Green River Aviation, UT (7 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

845206b
East Carbon, UT · 33 mi
845396b
Sunnyside, UT · 36 mi
845216a
Elmo, UT · 37 mi
845406b
Thompson, UT · 39 mi
845186a
Cleveland, UT · 41 mi
845016a
Price, UT · 45 mi
845156b
Cisco, UT · 48 mi
845426a
Wellington, UT · 48 mi

Utah planting zones →

Questions about 84525

What planting zone is ZIP code 84525?

ZIP code 84525 (Green River, 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 Green River, UT?

The median last spring frost (32 °F) near 84525 is April 22; after May 8 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Moab Canyonland Airport station.

When is the first frost in Green River, UT?

The median first fall frost near 84525 is October 20, giving a median frost-free growing season of 179 days.

When should I plant tomatoes in 84525?

Start tomato seeds indoors around Feb 25 – Mar 11 and set transplants outside around Apr 29 – May 13, one to three weeks after the median last frost.

How much rain and snow does 84525 get?

About 7.4 inches of precipitation a year and 5 inches of snowfall (NOAA 1991–2020 normals, Green River Aviation station).

How hot do summers get in Green River, UT?

The average high peaks at 96 °F in July, with about 84 days a year at 90 °F or more.

What kind of soil does 84525 have?

The USDA soil survey maps Lazear at the center of ZIP 84525: gravelly loam, well drained, pH about 8.2 (alkaline).

Did spring come early in Green River, UT in 2026?

Spring leaf-out near 84525 came on Mar 10 in 2026, 11 days earlier than the 1991–2020 average (Mar 21), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Green River, UT?

Intermediate onions: the longest day near 84525 is 14 h 55 min, so day-neutral types bulb best; long-day varieties may not bulb fully.