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

Planting zone for 82063 — Jelm, WY

ZIP code 82063 (Jelm, Albany County) is in USDA zone 5a: the coldest winter night averages −20 to −15 °F. The median last spring frost is June 5 and the first fall frost September 16.

Where ZIP 82063 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 5

First frostSep 16

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 Jelm, 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 Jelm, WY

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostJune 5median — 50% chance of a later frost

Safe for tender plantsJune 20only 10% chance of frost after

First fall frostSeptember 16median — 10% chance by Sep 5

Growing season101 daysfrost-free, median

A hard freeze (28 °F) usually ends around May 22 and returns around September 26.

From the NOAA station Rustic 9wsw, CO — 14 miles away, elevation 7,701 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 82063

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Apr 24 – May 8

SpinachSow outdoors · Apr 24 – May 15

Broccoli, cabbageStart indoors · Mar 27 – Apr 10

Broccoli, cabbageTransplant · May 15 – May 29

Onion setsPlant outdoors · May 8 – May 22

PotatoesPlant outdoors · May 15 – May 29

LettuceSow outdoors · May 8 – May 22

Carrots, beetsSow outdoors · May 15 – May 29

TomatoesStart indoors · Apr 10 – Apr 24

TomatoesTransplant · Jun 12 – Jun 26

Peppers, eggplantStart indoors · Mar 27 – Apr 10

Peppers, eggplantTransplant · Jun 19 – Jul 3

BeansSow outdoors · Jun 12 – Jun 26

Sweet cornSow outdoors · Jun 12 – Jun 26

Cucumbers, squashSow outdoors · Jun 12 – Jun 26

Fall lettuce, spinachSow outdoors · Jul 22 – Aug 5

GarlicPlant cloves · Sep 2 – Oct 7

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Jun 5) and first fall frost (Sep 16) 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 82063 came on May 8 — 14 days earlier than the 1991–2020 average (May 22).

average
May 222026
May 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 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 Jelm, WY.

Soil in Jelm, WY

The soil mapped at the center of ZIP 82063 is Tolby family — slightly decomposed plant material, excessively drained.

TextureSlightly decomposed plant materialtop layer

pH5.6moderately acidic; most vegetables like 6.0–7.0

DrainageExcessively drainednatural drainage class

Organic matter85%high

Hydrologic groupAwater soaks in fast

Farmland classNot prime farmlandUSDA classification

Map unit: Tolby-Legault families complex, moist, 40 to 75 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 82063; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Jelm, WY

Summer high80 °Faverage high, July

Winter low7 °Faverage low, January

Hot days1days a year at 90 °F or more

Freezing nights253nights a year at 32 °F or less

Growing degree days910base 50 °F — the season’s usable heat

Longest day15 h 06 mindaylight on June 21

Shortest day9 h 15 mindaylight on December 21

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

Precipitation28.7 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: Hohnholz Rch, CO (14 mi away); precipitation: Rawah, CO (4 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

805455a

Red Feather Lakes, CO · 15 mi

Estes Park, CO · 23 mi

Tie Siding, WY · 31 mi

Wyoming planting zones →

Questions about 82063

What planting zone is ZIP code 82063?

ZIP code 82063 (Jelm, 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 Jelm, WY?

The median last spring frost (32 °F) near 82063 is June 5; after June 20 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Rustic 9wsw station.

When is the first frost in Jelm, WY?

The median first fall frost near 82063 is September 16, giving a median frost-free growing season of 101 days.

When should I plant tomatoes in 82063?

Start tomato seeds indoors around Apr 10 – Apr 24 and set transplants outside around Jun 12 – Jun 26, one to three weeks after the median last frost.

How much rain and snow does 82063 get?

About 28.7 inches of precipitation a year (NOAA 1991–2020 normals, Rawah station).

How hot do summers get in Jelm, WY?

The average high peaks at 80 °F in July, with about 1 days a year at 90 °F or more.

What kind of soil does 82063 have?

The USDA soil survey maps Tolby family at the center of ZIP 82063: slightly decomposed plant material, excessively drained, pH about 5.6 (moderately acidic).

Did spring come early in Jelm, WY in 2026?

Spring leaf-out near 82063 came on May 8 in 2026, 14 days earlier than the 1991–2020 average (May 22), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Jelm, WY?

Long-day onions: the longest day near 82063 is 15 h 06 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 82063 change?

Yes. The 2012 USDA map put 82063 in zone 4b; the 2023 map puts it in zone 5a. The newer map uses 1991–2020 data and more weather stations.