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

Planting zone for 82432 — Manderson, WY

ZIP code 82432 (Manderson, Big Horn County) is in USDA zone 4b: the coldest winter night averages −25 to −20 °F. The median last spring frost is April 28 and the first fall frost October 10.

Where ZIP 82432 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.

Zone4b−25 to −20 °F
Coldest night−31.7 to −28.9 °C
Last frostApr 28
First frostOct 10
2012 zone4b

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 4b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Manderson, 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 Manderson, WY

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 28median — 50% chance of a later frost
Safe for tender plantsMay 11only 10% chance of frost after
First fall frostOctober 10median — 10% chance by Sep 26
Growing season164 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 17 and returns around October 20.

From the NOAA station Basin, WY — 15 miles away, elevation 3,839 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 82432

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 17 – Mar 31
SpinachSow outdoors · Mar 17 – Apr 7
Broccoli, cabbageStart indoors · Feb 17 – Mar 3
Broccoli, cabbageTransplant · Apr 7 – Apr 21
Onion setsPlant outdoors · Mar 31 – Apr 14
PotatoesPlant outdoors · Apr 7 – Apr 21
LettuceSow outdoors · Mar 31 – Apr 14
Carrots, beetsSow outdoors · Apr 7 – Apr 21
TomatoesStart indoors · Mar 3 – Mar 17
TomatoesTransplant · May 5 – May 19
Peppers, eggplantStart indoors · Feb 17 – Mar 3
Peppers, eggplantTransplant · May 12 – May 26
BeansSow outdoors · May 5 – May 19
Sweet cornSow outdoors · May 5 – May 19
Cucumbers, squashSow outdoors · May 5 – May 19
Fall lettuce, spinachSow outdoors · Aug 15 – Aug 29
GarlicPlant cloves · Sep 26 – Oct 31
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 28) and first fall frost (Oct 10) 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 82432 came on Mar 21 — 18 days earlier than the 1991–2020 average (Apr 8).

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 4b in Wyoming

495 plants native to the lower 48 states, recorded in Wyoming, and rated by the USDA to survive −25 °F or colder — the bottom of zone 4b. 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 83

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 226

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 152

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 Manderson, WY.

Soil in Manderson, WY

The soil mapped at the center of ZIP 82432 is Chipeta — clay loam, well drained.

TextureClay loamholds water and nutrients; slow to drain and warm up
pH8.6alkaline; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter0.75%low — add compost
Hydrologic groupDwater soaks in very slowly
Farmland classNot prime farmlandUSDA classification

Map unit: Chipeta-Persayo-Rock outcrop complex, 6 to 45 percent slopes -- Draft.

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 82432; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Manderson, WY

Summer high93 °Faverage high, July
Winter low9 °Faverage low, January
Hot days49days a year at 90 °F or more
Freezing nights176nights a year at 32 °F or less
Growing degree days3,112base 50 °F — the season’s usable heat
Longest day15 h 31 mindaylight on June 21
Shortest day8 h 52 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation7.4 inper year, rain and melted snow
Snowfall21 inper year; 65 days with snow on the ground

Average high and low, by month

0°10°20°30°40°50°60°70°80°90°100°32 °FJanuary: average high 32 °F, low 9 °F 32°9° JanFebruary: average high 39 °F, low 15 °F 39°15° FebMarch: average high 54 °F, low 27 °F 54°27° MarApril: average high 63 °F, low 37 °F 63°37° AprMay: average high 73 °F, low 47 °F 73°47° MayJune: average high 84 °F, low 55 °F 84°55° JunJuly: average high 93 °F, low 60 °F 93°60° JulAugust: average high 91 °F, low 57 °F 91°57° AugSeptember: average high 79 °F, low 48 °F 79°48° SepOctober: average high 63 °F, low 36 °F 63°36° OctNovember: average high 46 °F, low 23 °F 46°23° NovDecember: average high 34 °F, low 11 °F 34°11° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″January: 0.21 in precipitation, 3.8 in snowfall 0.2❄4 JanFebruary: 0.24 in precipitation, 3.7 in snowfall 0.2❄4 FebMarch: 0.29 in precipitation, 2.4 in snowfall 0.3❄2 MarApril: 0.80 in precipitation, 2.1 in snowfall 0.8❄2 AprMay: 1.43 in precipitation, 0.2 in snowfall 1.4 MayJune: 1.12 in precipitation 1.1 JunJuly: 0.66 in precipitation 0.7 JulAugust: 0.36 in precipitation 0.4 AugSeptember: 1.05 in precipitation, 0.4 in snowfall 1.1 SepOctober: 0.72 in precipitation, 1.7 in snowfall 0.7❄2 OctNovember: 0.32 in precipitation, 3.1 in snowfall 0.3❄3 NovDecember: 0.22 in precipitation, 3.8 in snowfall 0.2❄4 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Basin, WY (15 mi away); precipitation: Rairden 2wsw, WY (5 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

824285a
Hyattville, WY · 14 mi
824104b
Basin, WY · 18 mi
824014b
Worland, WY · 21 mi
824264b
Greybull, WY · 23 mi
824344b
Otto, WY · 24 mi
824415a
Shell, WY · 26 mi
824225a
Emblem, WY · 33 mi
824304b
Kirby, WY · 33 mi

Wyoming planting zones →

Questions about 82432

What planting zone is ZIP code 82432?

ZIP code 82432 (Manderson, WY) is in USDA hardiness zone 4b on the 2023 map: the coldest night of an average winter reaches −25 to −20 °F (−31.7 to −28.9 °C).

When is the last frost in Manderson, WY?

The median last spring frost (32 °F) near 82432 is April 28; after May 11 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Basin station.

When is the first frost in Manderson, WY?

The median first fall frost near 82432 is October 10, giving a median frost-free growing season of 164 days.

When should I plant tomatoes in 82432?

Start tomato seeds indoors around Mar 3 – Mar 17 and set transplants outside around May 5 – May 19, one to three weeks after the median last frost.

How much rain and snow does 82432 get?

About 7.4 inches of precipitation a year and 21 inches of snowfall (NOAA 1991–2020 normals, Rairden 2wsw station).

How hot do summers get in Manderson, WY?

The average high peaks at 93 °F in July, with about 49 days a year at 90 °F or more.

What kind of soil does 82432 have?

The USDA soil survey maps Chipeta at the center of ZIP 82432: clay loam, well drained, pH about 8.6 (alkaline).

Did spring come early in Manderson, WY in 2026?

Spring leaf-out near 82432 came on Mar 21 in 2026, 18 days earlier than the 1991–2020 average (Apr 8), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Manderson, WY?

Long-day onions: the longest day near 82432 is 15 h 31 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).