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

Planting zone for 82201 — Wheatland, WY

ZIP code 82201 (Wheatland, Platte County) is in USDA zone 5a: the coldest winter night averages −20 to −15 °F. The median last spring frost is May 19 and the first fall frost September 22.

Where ZIP 82201 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.

Zone5a−20 to −15 °F
Coldest night−28.9 to −26.1 °C
Last frostMay 19
First frostSep 22
2012 zone5a

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 5a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Wheatland, WY…

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 Wheatland, WY

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMay 19median — 50% chance of a later frost
Safe for tender plantsJune 2only 10% chance of frost after
First fall frostSeptember 22median — 10% chance by Sep 8
Growing season125 daysfrost-free, median

A hard freeze (28 °F) usually ends around May 9 and returns around October 1.

From the NOAA station Wheatland 4 N, WY — 12 miles away, elevation 4,639 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 82201

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Apr 7 – Apr 21
SpinachSow outdoors · Apr 7 – Apr 28
Broccoli, cabbageStart indoors · Mar 10 – Mar 24
Broccoli, cabbageTransplant · Apr 28 – May 12
Onion setsPlant outdoors · Apr 21 – May 5
PotatoesPlant outdoors · Apr 28 – May 12
LettuceSow outdoors · Apr 21 – May 5
Carrots, beetsSow outdoors · Apr 28 – May 12
TomatoesStart indoors · Mar 24 – Apr 7
TomatoesTransplant · May 26 – Jun 9
Peppers, eggplantStart indoors · Mar 10 – Mar 24
Peppers, eggplantTransplant · Jun 2 – Jun 16
BeansSow outdoors · May 26 – Jun 9
Sweet cornSow outdoors · May 26 – Jun 9
Cucumbers, squashSow outdoors · May 26 – Jun 9
Fall lettuce, spinachSow outdoors · Jul 28 – Aug 11
GarlicPlant cloves · Sep 8 – Oct 13
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 19) and first fall frost (Sep 22) 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 82201 came on Feb 26 — 37 days earlier than the 1991–2020 average (Apr 4).

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 5a in Wyoming

542 plants native to the lower 48 states, recorded in Wyoming, and rated by the USDA to survive −20 °F or colder — the bottom of zone 5a. Each links to its USDA PLANTS profile.

Trees 22

American elm120 ft · blooms early spring · medium shade tolerance · to −46 °Fbalsam poplar80 ft · blooms late spring · high shade tolerance · to −79 °Fblack locust60 ft · blooms spring · high shade tolerance · to −37 °Fblue spruce100 ft · blooms late spring · medium shade tolerance · to −38 °Fboxelder60 ft · blooms early spring · low shade tolerance · to −46 °FDouglas-fir200 ft · blooms mid spring · medium shade tolerance · to −33 °F

Shrubs 98

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 black currant3 ft · blooms early spring · to −46 °FAmerican plum24 ft · blooms mid spring · high shade tolerance · to −38 °Fantelope bitterbrush6 ft · blooms early spring · medium shade tolerance · to −36 °F

Wildflowers & perennials 249

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 °Falpine sweetvetch2 ft · blooms early summer · high shade tolerance · to −62 °FAmerican alpine speedwell1 ft · blooms summer · medium shade tolerance · to −28 °FAmerican bistort1.5 ft · blooms mid spring · high shade tolerance · to −38 °F

Grasses 161

Alaska oniongrass3 ft · blooms mid spring · low shade tolerance · to −33 °Falkali 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 °F

Vines 3

American bittersweet15 ft · blooms spring · low shade tolerance · to −38 °Friverbank grape45 ft · blooms late spring · medium shade tolerance · to −33 °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 Wheatland, WY.

Soil in Wheatland, WY

The soil mapped at the center of ZIP 82201 is Claprych — very gravelly sandy loam, well drained.

TextureVery gravelly sandy loamdrains and warms fast; dries out and needs more feeding
pH8.2alkaline; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter0.75%low — add compost
Hydrologic groupAwater soaks in fast
Farmland classNot prime farmlandUSDA classification

Map unit: Claprych-Luman very gravelly sandy loams, 0 to 10 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 82201; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Wheatland, WY

Summer high90 °Faverage high, July
Winter low16 °Faverage low, December
Hot days44days a year at 90 °F or more
Freezing nights153nights a year at 32 °F or less
Growing degree days2,546base 50 °F — the season’s usable heat
Longest day15 h 15 mindaylight on June 21
Shortest day9 h 07 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation14.1 inper year, rain and melted snow
Snowfall40 inper year; 23 days with snow on the ground

Average high and low, by month

10°20°30°40°50°60°70°80°90°100°32 °FJanuary: average high 43 °F, low 17 °F 43°17° JanFebruary: average high 45 °F, low 17 °F 45°17° FebMarch: average high 55 °F, low 24 °F 55°24° MarApril: average high 62 °F, low 30 °F 62°30° AprMay: average high 71 °F, low 39 °F 71°39° MayJune: average high 83 °F, low 48 °F 83°48° JunJuly: average high 90 °F, low 54 °F 90°54° JulAugust: average high 89 °F, low 52 °F 89°52° AugSeptember: average high 80 °F, low 43 °F 80°43° SepOctober: average high 66 °F, low 32 °F 66°32° OctNovember: average high 52 °F, low 24 °F 52°24° NovDecember: average high 43 °F, low 16 °F 43°16° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″3″January: 0.28 in precipitation, 4.6 in snowfall 0.3❄5 JanFebruary: 0.42 in precipitation, 7.8 in snowfall 0.4❄8 FebMarch: 0.74 in precipitation, 7.4 in snowfall 0.7❄7 MarApril: 1.70 in precipitation, 5.4 in snowfall 1.7❄5 AprMay: 2.70 in precipitation, 1.4 in snowfall 2.7❄1 MayJune: 2.12 in precipitation 2.1 JunJuly: 1.73 in precipitation 1.7 JulAugust: 1.17 in precipitation 1.2 AugSeptember: 1.29 in precipitation, 0.1 in snowfall 1.3 SepOctober: 1.14 in precipitation, 3.2 in snowfall 1.1❄3 OctNovember: 0.45 in precipitation, 4.3 in snowfall 0.5❄4 NovDecember: 0.39 in precipitation, 5.7 in snowfall 0.4❄6 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Wheatland 4 N, WY (12 mi away); precipitation: Wheatland 4 N, WY (12 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

822145a
Guernsey, WY · 27 mi
820585a
Garrett, WY · 27 mi
822105a
Chugwater, WY · 28 mi
822135a
Glendo, WY · 35 mi
820615b
Horse Creek, WY · 35 mi
822125a
Fort Laramie, WY · 35 mi
822445a
Yoder, WY · 36 mi
822435a
Veteran, WY · 37 mi

Wyoming planting zones →

Questions about 82201

What planting zone is ZIP code 82201?

ZIP code 82201 (Wheatland, WY) is in USDA hardiness zone 5a on the 2023 map: the coldest night of an average winter reaches −20 to −15 °F (−28.9 to −26.1 °C).

When is the last frost in Wheatland, WY?

The median last spring frost (32 °F) near 82201 is May 19; after June 2 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Wheatland 4 N station.

When is the first frost in Wheatland, WY?

The median first fall frost near 82201 is September 22, giving a median frost-free growing season of 125 days.

When should I plant tomatoes in 82201?

Start tomato seeds indoors around Mar 24 – Apr 7 and set transplants outside around May 26 – Jun 9, one to three weeks after the median last frost.

How much rain and snow does 82201 get?

About 14.1 inches of precipitation a year and 40 inches of snowfall (NOAA 1991–2020 normals, Wheatland 4 N station).

How hot do summers get in Wheatland, WY?

The average high peaks at 90 °F in July, with about 44 days a year at 90 °F or more.

What kind of soil does 82201 have?

The USDA soil survey maps Claprych at the center of ZIP 82201: very gravelly sandy loam, well drained, pH about 8.2 (alkaline).

Did spring come early in Wheatland, WY in 2026?

Spring leaf-out near 82201 came on Feb 26 in 2026, 37 days earlier than the 1991–2020 average (Apr 4), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Wheatland, WY?

Long-day onions: the longest day near 82201 is 15 h 15 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).