Data: 2023 USDA zones (PRISM/OSU) · NOAA 1991–2020 normals · updated Oct 30, 2026

Planting zone for 82058 — Garrett, WY

ZIP code 82058 (Garrett, Albany County) is in USDA zone 5a: the coldest winter night averages −20 to −15 °F. The median last spring frost is June 2 and the first fall frost September 9.

Where ZIP 82058 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 2

First frostSep 9

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 Garrett, 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 Garrett, WY

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostJune 2median — 50% chance of a later frost

Safe for tender plantsJune 25only 10% chance of frost after

First fall frostSeptember 9median — 10% chance by Aug 26

Growing season99 daysfrost-free, median

A hard freeze (28 °F) usually ends around May 16 and returns around September 20.

From the NOAA station Double Four Rch, WY — 11 miles away, elevation 6,119 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 82058

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Apr 21 – May 5

SpinachSow outdoors · Apr 21 – May 12

Broccoli, cabbageStart indoors · Mar 24 – Apr 7

Broccoli, cabbageTransplant · May 12 – May 26

Onion setsPlant outdoors · May 5 – May 19

PotatoesPlant outdoors · May 12 – May 26

LettuceSow outdoors · May 5 – May 19

Carrots, beetsSow outdoors · May 12 – May 26

TomatoesStart indoors · Apr 7 – Apr 21

TomatoesTransplant · Jun 9 – Jun 23

Peppers, eggplantStart indoors · Mar 24 – Apr 7

Peppers, eggplantTransplant · Jun 16 – Jun 30

BeansSow outdoors · Jun 9 – Jun 23

Sweet cornSow outdoors · Jun 9 – Jun 23

Cucumbers, squashSow outdoors · Jun 9 – Jun 23

Fall lettuce, spinachSow outdoors · Jul 15 – Jul 29

GarlicPlant cloves · Aug 26 – Sep 30

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Jun 2) and first fall frost (Sep 9) 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 82058 came on Apr 9 — 24 days earlier than the 1991–2020 average (May 3).

average
May 32026
Apr 9

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 Garrett, WY.

Soil in Garrett, WY

The soil mapped at the center of ZIP 82058 is Ansel — slightly decomposed plant material, well drained.

TextureSlightly decomposed plant materialtop layer

pH5.0strongly acidic; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter75%high

Hydrologic groupBwater soaks in moderately

Farmland classNot prime farmlandUSDA classification

Map unit: Ansel-Granile gravelly sandy loams, 6 to 45 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 82058; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Garrett, WY

Summer high84 °Faverage high, July

Winter low16 °Faverage low, February

Hot days12days a year at 90 °F or more

Freezing nights203nights a year at 32 °F or less

Growing degree days1,557base 50 °F — the season’s usable heat

Longest day15 h 16 mindaylight on June 21

Shortest day9 h 06 mindaylight on December 21

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

Precipitation22.1 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: Double Four Rch, WY (11 mi away); precipitation: Windy Peak, WY (9 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.

823294a

Medicine Bow, WY · 27 mi

822015a

Wheatland, WY · 27 mi

820834b

Rock River, WY · 36 mi

Wyoming planting zones →

Questions about 82058

What planting zone is ZIP code 82058?

ZIP code 82058 (Garrett, 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 Garrett, WY?

The median last spring frost (32 °F) near 82058 is June 2; after June 25 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Double Four Rch station.

When is the first frost in Garrett, WY?

The median first fall frost near 82058 is September 9, giving a median frost-free growing season of 99 days.

When should I plant tomatoes in 82058?

Start tomato seeds indoors around Apr 7 – Apr 21 and set transplants outside around Jun 9 – Jun 23, one to three weeks after the median last frost.

How much rain and snow does 82058 get?

About 22.1 inches of precipitation a year (NOAA 1991–2020 normals, Windy Peak station).

How hot do summers get in Garrett, WY?

The average high peaks at 84 °F in July, with about 12 days a year at 90 °F or more.

What kind of soil does 82058 have?

The USDA soil survey maps Ansel at the center of ZIP 82058: slightly decomposed plant material, well drained, pH about 5.0 (strongly acidic).

Did spring come early in Garrett, WY in 2026?

Spring leaf-out near 82058 came on Apr 9 in 2026, 24 days earlier than the 1991–2020 average (May 3), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Garrett, WY?

Long-day onions: the longest day near 82058 is 15 h 16 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).