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

Planting zone for 82939 — Mountain View, WY

ZIP code 82939 (Mountain View, Uinta County) is in USDA zone 5b: the coldest winter night averages −15 to −10 °F. The median last spring frost is June 14 and the first fall frost September 9.

Where ZIP 82939 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.

Zone5b−15 to −10 °F
Coldest night−26.1 to −23.3 °C
Last frostJun 14
First frostSep 9
2012 zone5b

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 5b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Mountain View, 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 Mountain View, WY

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostJune 14median — 50% chance of a later frost
Safe for tender plantsJuly 1only 10% chance of frost after
First fall frostSeptember 9median — 10% chance by Aug 23
Growing season84 daysfrost-free, median

A hard freeze (28 °F) usually ends around May 30 and returns around September 20.

From the NOAA station Mtn View, WY — 3 miles away, elevation 6,802 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 82939

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · May 3 – May 17
SpinachSow outdoors · May 3 – May 24
Broccoli, cabbageStart indoors · Apr 5 – Apr 19
Broccoli, cabbageTransplant · May 24 – Jun 7
Onion setsPlant outdoors · May 17 – May 31
PotatoesPlant outdoors · May 24 – Jun 7
LettuceSow outdoors · May 17 – May 31
Carrots, beetsSow outdoors · May 24 – Jun 7
TomatoesStart indoors · Apr 19 – May 3
TomatoesTransplant · Jun 21 – Jul 5
Peppers, eggplantStart indoors · Apr 5 – Apr 19
Peppers, eggplantTransplant · Jun 28 – Jul 12
BeansSow outdoors · Jun 21 – Jul 5
Sweet cornSow outdoors · Jun 21 – Jul 5
Cucumbers, squashSow outdoors · Jun 21 – Jul 5
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 14) 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 82939 came on Mar 25 — 30 days earlier than the 1991–2020 average (Apr 24).

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 5b in Wyoming

549 plants native to the lower 48 states, recorded in Wyoming, and rated by the USDA to survive −15 °F or colder — the bottom of zone 5b. 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 99

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 254

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 162

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 Mountain View, WY.

Soil in Mountain View, WY

The soil mapped at the center of ZIP 82939 is Millburne — sandy loam, well drained.

TextureSandy loamdrains and warms fast; dries out and needs more feeding
pH7.6slightly alkaline; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter2%moderate
Hydrologic groupC/Dslow when drained; wet otherwise
Farmland classNot prime farmlandUSDA classification

Map unit: Millburne-Poposhia complex, 1 to 8 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 82939; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Mountain View, WY

Summer high80 °Faverage high, July
Winter low11 °Faverage low, January
Hot days1days a year at 90 °F or more
Freezing nights206nights a year at 32 °F or less
Growing degree days1,223base 50 °F — the season’s usable heat
Longest day15 h 09 mindaylight on June 21
Shortest day9 h 12 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation11 inper year, rain and melted snow
Snowfall64 inper year; 82 days with snow on the ground

Average high and low, by month

0°10°20°30°40°50°60°70°80°90°32 °FJanuary: average high 32 °F, low 11 °F 32°11° JanFebruary: average high 34 °F, low 11 °F 34°11° FebMarch: average high 44 °F, low 20 °F 44°20° MarApril: average high 52 °F, low 25 °F 52°25° AprMay: average high 63 °F, low 33 °F 63°33° MayJune: average high 73 °F, low 40 °F 73°40° JunJuly: average high 80 °F, low 47 °F 80°47° JulAugust: average high 78 °F, low 45 °F 78°45° AugSeptember: average high 70 °F, low 37 °F 70°37° SepOctober: average high 57 °F, low 28 °F 57°28° OctNovember: average high 41 °F, low 17 °F 41°17° NovDecember: average high 31 °F, low 11 °F 31°11° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″January: 0.61 in precipitation, 8.9 in snowfall 0.6❄9 JanFebruary: 0.56 in precipitation, 9 in snowfall 0.6❄9 FebMarch: 0.76 in precipitation, 9.4 in snowfall 0.8❄9 MarApril: 1.10 in precipitation, 7.5 in snowfall 1.1❄8 AprMay: 1.36 in precipitation, 3 in snowfall 1.4❄3 MayJune: 0.91 in precipitation, 0.2 in snowfall 0.9 JunJuly: 1.10 in precipitation 1.1 JulAugust: 0.82 in precipitation 0.8 AugSeptember: 1.28 in precipitation, 1 in snowfall 1.3❄1 SepOctober: 0.98 in precipitation, 5.6 in snowfall 1.0❄6 OctNovember: 0.76 in precipitation, 9.7 in snowfall 0.8❄10 NovDecember: 0.79 in precipitation, 9.5 in snowfall 0.8❄10 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Mtn View, WY (3 mi away); precipitation: Mtn View, WY (3 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.

829335b
Fort Bridger, WY · 9 mi
829375a
Lyman, WY · 10 mi
829445a
Robertson, WY · 10 mi
829365b
Lonetree, WY · 14 mi
829305a
Evanston, WY · 23 mi
829385b
Mc Kinnon, WY · 25 mi
829315a
Evanston, WY · 30 mi
829344b
Granger, WY · 33 mi

Wyoming planting zones →

Questions about 82939

What planting zone is ZIP code 82939?

ZIP code 82939 (Mountain View, WY) is in USDA hardiness zone 5b on the 2023 map: the coldest night of an average winter reaches −15 to −10 °F (−26.1 to −23.3 °C).

When is the last frost in Mountain View, WY?

The median last spring frost (32 °F) near 82939 is June 14; after July 1 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Mtn View station.

When is the first frost in Mountain View, WY?

The median first fall frost near 82939 is September 9, giving a median frost-free growing season of 84 days.

When should I plant tomatoes in 82939?

Start tomato seeds indoors around Apr 19 – May 3 and set transplants outside around Jun 21 – Jul 5, one to three weeks after the median last frost.

How much rain and snow does 82939 get?

About 11 inches of precipitation a year and 64 inches of snowfall (NOAA 1991–2020 normals, Mtn View station).

How hot do summers get in Mountain View, 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 82939 have?

The USDA soil survey maps Millburne at the center of ZIP 82939: sandy loam, well drained, pH about 7.6 (slightly alkaline).

Did spring come early in Mountain View, WY in 2026?

Spring leaf-out near 82939 came on Mar 25 in 2026, 30 days earlier than the 1991–2020 average (Apr 24), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Mountain View, WY?

Long-day onions: the longest day near 82939 is 15 h 09 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).