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

Planting zone for 82513 — Dubois, WY

ZIP code 82513 (Dubois, Fremont County) is in USDA zone 4b: the coldest winter night averages −25 to −20 °F. The median last spring frost is June 1 and the first fall frost September 14.

Where ZIP 82513 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 frostJun 1

First frostSep 14

2012 zone5a

Was 5a on the 2012 map — half a zone colder now. 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 Dubois, 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 Dubois, WY

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostJune 1median — 50% chance of a later frost

Safe for tender plantsJune 19only 10% chance of frost after

First fall frostSeptember 14median — 10% chance by Sep 1

Growing season104 daysfrost-free, median

A hard freeze (28 °F) usually ends around May 15 and returns around September 26.

From the NOAA station Burris, WY — 25 miles away, elevation 6,126 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 82513

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Apr 20 – May 4

SpinachSow outdoors · Apr 20 – May 11

Broccoli, cabbageStart indoors · Mar 23 – Apr 6

Broccoli, cabbageTransplant · May 11 – May 25

Onion setsPlant outdoors · May 4 – May 18

PotatoesPlant outdoors · May 11 – May 25

LettuceSow outdoors · May 4 – May 18

Carrots, beetsSow outdoors · May 11 – May 25

TomatoesStart indoors · Apr 6 – Apr 20

TomatoesTransplant · Jun 8 – Jun 22

Peppers, eggplantStart indoors · Mar 23 – Apr 6

Peppers, eggplantTransplant · Jun 15 – Jun 29

BeansSow outdoors · Jun 8 – Jun 22

Sweet cornSow outdoors · Jun 8 – Jun 22

Cucumbers, squashSow outdoors · Jun 8 – Jun 22

Fall lettuce, spinachSow outdoors · Jul 20 – Aug 3

GarlicPlant cloves · Aug 31 – Oct 5

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Jun 1) and first fall frost (Sep 14) 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 82513 came on Apr 22 — 19 days earlier than the 1991–2020 average (May 11).

average
May 112026
Apr 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 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.

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 Dubois, WY.

Soil in Dubois, WY

The soil mapped at the center of ZIP 82513 is Burnette — loam, well drained.

TextureLoama good balance for most vegetables

pH7.0neutral; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter2%moderate

Hydrologic groupCwater soaks in slowly

Farmland classNot prime farmlandUSDA classification

Map unit: Burnette loam, 3 to 10 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 82513; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Dubois, WY

Summer high79 °Faverage high, July

Winter low13 °Faverage low, January

Hot days1days a year at 90 °F or more

Freezing nights224nights a year at 32 °F or less

Growing degree days1,024base 50 °F — the season’s usable heat

Longest day15 h 26 mindaylight on June 21

Shortest day8 h 56 mindaylight on December 21

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

Precipitation28 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: Dubois, WY (6 mi away); precipitation: Burroughs Creek, WY (6 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

829254b

Cora, WY · 33 mi

824334b

Meeteetse, WY · 40 mi

825235a

Pavillion, WY · 42 mi

825125a

Crowheart, WY · 46 mi

Fort Washakie, WY · 49 mi

825165a

Kinnear, WY · 49 mi

Wyoming planting zones →

Questions about 82513

What planting zone is ZIP code 82513?

ZIP code 82513 (Dubois, 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 Dubois, WY?

The median last spring frost (32 °F) near 82513 is June 1; after June 19 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Burris station.

When is the first frost in Dubois, WY?

The median first fall frost near 82513 is September 14, giving a median frost-free growing season of 104 days.

When should I plant tomatoes in 82513?

Start tomato seeds indoors around Apr 6 – Apr 20 and set transplants outside around Jun 8 – Jun 22, one to three weeks after the median last frost.

How much rain and snow does 82513 get?

About 28 inches of precipitation a year (NOAA 1991–2020 normals, Burroughs Creek station).

How hot do summers get in Dubois, WY?

The average high peaks at 79 °F in July, with about 1 days a year at 90 °F or more.

What kind of soil does 82513 have?

The USDA soil survey maps Burnette at the center of ZIP 82513: loam, well drained, pH about 7.0 (neutral).

Did spring come early in Dubois, WY in 2026?

Spring leaf-out near 82513 came on Apr 22 in 2026, 19 days earlier than the 1991–2020 average (May 11), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Dubois, WY?

Long-day onions: the longest day near 82513 is 15 h 26 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 82513 change?

Yes. The 2012 USDA map put 82513 in zone 5a; the 2023 map puts it in zone 4b. The newer map uses 1991–2020 data and more weather stations.