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

Planting zone for 82335 — Walcott, WY

ZIP code 82335 (Walcott, Carbon County) is in USDA zone 5a: the coldest winter night averages −20 to −15 °F. The median last spring frost is June 12 and the first fall frost September 7.

Where ZIP 82335 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 frostJun 12
First frostSep 7
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 Walcott, 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 Walcott, WY

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostJune 12median — 50% chance of a later frost
Safe for tender plantsJune 30only 10% chance of frost after
First fall frostSeptember 7median — 10% chance by Aug 22
Growing season83 daysfrost-free, median

A hard freeze (28 °F) usually ends around May 25 and returns around September 16.

From the NOAA station Saratoga 4n, WY — 18 miles away, elevation 6,802 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 82335

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · May 1 – May 15
SpinachSow outdoors · May 1 – May 22
Broccoli, cabbageStart indoors · Apr 3 – Apr 17
Broccoli, cabbageTransplant · May 22 – Jun 5
Onion setsPlant outdoors · May 15 – May 29
PotatoesPlant outdoors · May 22 – Jun 5
LettuceSow outdoors · May 15 – May 29
Carrots, beetsSow outdoors · May 22 – Jun 5
TomatoesStart indoors · Apr 17 – May 1
TomatoesTransplant · Jun 19 – Jul 3
Peppers, eggplantStart indoors · Apr 3 – Apr 17
Peppers, eggplantTransplant · Jun 26 – Jul 10
BeansSow outdoors · Jun 19 – Jul 3
Sweet cornSow outdoors · Jun 19 – Jul 3
Cucumbers, squashSow outdoors · Jun 19 – Jul 3
Fall lettuce, spinachSow outdoors · Jul 13 – Jul 27
GarlicPlant cloves · Aug 24 – Sep 28
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Jun 12) and first fall frost (Sep 7) 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 82335 came on Mar 25 — 29 days earlier than the 1991–2020 average (Apr 23).

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 Walcott, WY.

Soil in Walcott, WY

The soil mapped at the center of ZIP 82335 is Seminoe — sandy loam, well drained.

TextureSandy loamdrains and warms fast; dries out and needs more feeding
pH7.4slightly alkaline; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter1.5%low — add compost
Hydrologic groupBwater soaks in moderately
Farmland classNot prime farmlandUSDA classification

Map unit: Seminoe-Cusheet complex, 4 to 15 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 82335; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Walcott, WY

Summer high84 °Faverage high, July
Winter low7 °Faverage low, January
Hot days5days a year at 90 °F or more
Freezing nights229nights a year at 32 °F or less
Growing degree days1,319base 50 °F — the season’s usable heat
Longest day15 h 13 mindaylight on June 21
Shortest day9 h 08 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation13.4 inper year, rain and melted snow

Average high and low, by month

0°10°20°30°40°50°60°70°80°90°32 °FJanuary: average high 33 °F, low 7 °F 33°7° JanFebruary: average high 36 °F, low 10 °F 36°10° FebMarch: average high 45 °F, low 19 °F 45°19° MarApril: average high 53 °F, low 25 °F 53°25° AprMay: average high 64 °F, low 33 °F 64°33° MayJune: average high 75 °F, low 40 °F 75°40° JunJuly: average high 84 °F, low 46 °F 84°46° JulAugust: average high 81 °F, low 44 °F 81°44° AugSeptember: average high 72 °F, low 34 °F 72°34° SepOctober: average high 58 °F, low 24 °F 58°24° OctNovember: average high 43 °F, low 16 °F 43°16° NovDecember: average high 33 °F, low 7 °F 33°7° Dec

Precipitation by month inches

0″1″2″January: 0.58 in precipitation 0.6 JanFebruary: 0.83 in precipitation 0.8 FebMarch: 1.06 in precipitation 1.1 MarApril: 1.51 in precipitation 1.5 AprMay: 1.67 in precipitation 1.7 MayJune: 1.31 in precipitation 1.3 JunJuly: 0.94 in precipitation 0.9 JulAugust: 1.17 in precipitation 1.2 AugSeptember: 1.25 in precipitation 1.3 SepOctober: 1.47 in precipitation 1.5 OctNovember: 0.82 in precipitation 0.8 NovDecember: 0.78 in precipitation 0.8 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Saratoga 4n, WY (18 mi away); precipitation: Saratoga 4n, WY (18 mi away). 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.

826154b
Shirley Basin, WY · 9 mi
823345a
Sinclair, WY · 15 mi
823245a
Elk Mountain, WY · 22 mi
823315a
Saratoga, WY · 25 mi
823275a
Hanna, WY · 28 mi
823015a
Rawlins, WY · 37 mi
820555a
Centennial, WY · 40 mi
823294a
Medicine Bow, WY · 42 mi

Wyoming planting zones →

Questions about 82335

What planting zone is ZIP code 82335?

ZIP code 82335 (Walcott, 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 Walcott, WY?

The median last spring frost (32 °F) near 82335 is June 12; after June 30 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Saratoga 4n station.

When is the first frost in Walcott, WY?

The median first fall frost near 82335 is September 7, giving a median frost-free growing season of 83 days.

When should I plant tomatoes in 82335?

Start tomato seeds indoors around Apr 17 – May 1 and set transplants outside around Jun 19 – Jul 3, one to three weeks after the median last frost.

How much rain and snow does 82335 get?

About 13.4 inches of precipitation a year (NOAA 1991–2020 normals, Saratoga 4n station).

How hot do summers get in Walcott, WY?

The average high peaks at 84 °F in July, with about 5 days a year at 90 °F or more.

What kind of soil does 82335 have?

The USDA soil survey maps Seminoe at the center of ZIP 82335: sandy loam, well drained, pH about 7.4 (slightly alkaline).

Did spring come early in Walcott, WY in 2026?

Spring leaf-out near 82335 came on Mar 25 in 2026, 29 days earlier than the 1991–2020 average (Apr 23), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Walcott, WY?

Long-day onions: the longest day near 82335 is 15 h 13 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).