Data: 2023 USDA zones (PRISM/OSU) · NOAA 1991–2020 normals · updated Oct 29, 2026

Planting zone for 82710 — Aladdin, WY

ZIP code 82710 (Aladdin, Crook County) is in USDA zone 5a: the coldest winter night averages −20 to −15 °F. The median last spring frost is May 23 and the first fall frost September 24.

Where ZIP 82710 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 23

First frostSep 24

2012 zone4b

Was 4b on the 2012 map — half a zone warmer now. 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 Aladdin, 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 Aladdin, WY

JanFebMarAprMayJunJulAugSepOctNovDec

Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free

Last spring frostMay 23median — 50% chance of a later frost

Safe for tender plantsJune 3only 10% chance of frost after

First fall frostSeptember 24median — 10% chance by Sep 7

Growing season121 daysfrost-free, median

A hard freeze (28 °F) usually ends around May 12 and returns around October 4.

From the NOAA station Sundance 8 Nnw, WY — 14 miles away, elevation 5,791 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 82710

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Apr 11 – Apr 25

SpinachSow outdoors · Apr 11 – May 2

Broccoli, cabbageStart indoors · Mar 14 – Mar 28

Broccoli, cabbageTransplant · May 2 – May 16

Onion setsPlant outdoors · Apr 25 – May 9

PotatoesPlant outdoors · May 2 – May 16

LettuceSow outdoors · Apr 25 – May 9

Carrots, beetsSow outdoors · May 2 – May 16

TomatoesStart indoors · Mar 28 – Apr 11

TomatoesTransplant · May 30 – Jun 13

Peppers, eggplantStart indoors · Mar 14 – Mar 28

Peppers, eggplantTransplant · Jun 6 – Jun 20

BeansSow outdoors · May 30 – Jun 13

Sweet cornSow outdoors · May 30 – Jun 13

Cucumbers, squashSow outdoors · May 30 – Jun 13

Fall lettuce, spinachSow outdoors · Jul 30 – Aug 13

GarlicPlant cloves · Sep 10 – Oct 15

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 23) and first fall frost (Sep 24) 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 82710 came on Mar 22 — 21 days earlier than the 1991–2020 average (Apr 12).

average
Apr 122026
Mar 22

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.

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 Aladdin, WY.

Soil in Aladdin, WY

The soil mapped at the center of ZIP 82710 is Tollflat — moderately decomposed plant material, well drained.

TextureModerately decomposed plant materialtop layer

pH5.2strongly acidic; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter57%high

Hydrologic groupCwater soaks in slowly

Farmland classNot prime farmlandUSDA classification

Map unit: Tollflat-Hickok-Vanocker complex, 10 to 60 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 82710; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Aladdin, WY

Summer high75 °Faverage high, July

Winter low15 °Faverage low, January

Hot days1days a year at 90 °F or more

Freezing nights182nights a year at 32 °F or less

Growing degree days1,407base 50 °F — the season’s usable heat

Longest day15 h 35 mindaylight on June 21

Shortest day8 h 48 mindaylight on December 21

Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)

Precipitation29.2 inper year, rain and melted snow

Average high and low, by month

Precipitation by month inches

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Sundance 8 Nnw, WY (14 mi away); precipitation: Sundance 8 Nnw, WY (14 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

Devils Tower, WY · 21 mi

827294b

Sundance, WY · 22 mi

577835b

Spearfish, SD · 25 mi

577174b

Belle Fourche, SD · 26 mi

577795b

Saint Onge, SD · 28 mi

Wyoming planting zones →

Questions about 82710

What planting zone is ZIP code 82710?

ZIP code 82710 (Aladdin, 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 Aladdin, WY?

The median last spring frost (32 °F) near 82710 is May 23; after June 3 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Sundance 8 Nnw station.

When is the first frost in Aladdin, WY?

The median first fall frost near 82710 is September 24, giving a median frost-free growing season of 121 days.

When should I plant tomatoes in 82710?

Start tomato seeds indoors around Mar 28 – Apr 11 and set transplants outside around May 30 – Jun 13, one to three weeks after the median last frost.

How much rain and snow does 82710 get?

About 29.2 inches of precipitation a year (NOAA 1991–2020 normals, Sundance 8 Nnw station).

How hot do summers get in Aladdin, WY?

The average high peaks at 75 °F in July, with about 1 days a year at 90 °F or more.

What kind of soil does 82710 have?

The USDA soil survey maps Tollflat at the center of ZIP 82710: moderately decomposed plant material, well drained, pH about 5.2 (strongly acidic).

Did spring come early in Aladdin, WY in 2026?

Spring leaf-out near 82710 came on Mar 22 in 2026, 21 days earlier than the 1991–2020 average (Apr 12), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Aladdin, WY?

Long-day onions: the longest day near 82710 is 15 h 35 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 82710 change?

Yes. The 2012 USDA map put 82710 in zone 4b; the 2023 map puts it in zone 5a. The newer map uses 1991–2020 data and more weather stations.