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

Planting zone for 84336 — Snowville, UT

ZIP code 84336 (Snowville, Box Elder County) is in USDA zone 6a: the coldest winter night averages −10 to −5 °F. The median last spring frost is May 12 and the first fall frost October 5.

Where ZIP 84336 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.

Zone6a−10 to −5 °F
Coldest night−23.3 to −20.6 °C
Last frostMay 12
First frostOct 5
2012 zone6a

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 6a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Snowville, UT…

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 Snowville, UT

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMay 12median — 50% chance of a later frost
Safe for tender plantsJune 8only 10% chance of frost after
First fall frostOctober 5median — 10% chance by Sep 24
Growing season144 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 27 and returns around October 15.

From the NOAA station Brigham City 28 Wnw, UT — 24 miles away, elevation 4,951 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 84336

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 31 – Apr 14
SpinachSow outdoors · Mar 31 – Apr 21
Broccoli, cabbageStart indoors · Mar 3 – Mar 17
Broccoli, cabbageTransplant · Apr 21 – May 5
Onion setsPlant outdoors · Apr 14 – Apr 28
PotatoesPlant outdoors · Apr 21 – May 5
LettuceSow outdoors · Apr 14 – Apr 28
Carrots, beetsSow outdoors · Apr 21 – May 5
TomatoesStart indoors · Mar 17 – Mar 31
TomatoesTransplant · May 19 – Jun 2
Peppers, eggplantStart indoors · Mar 3 – Mar 17
Peppers, eggplantTransplant · May 26 – Jun 9
BeansSow outdoors · May 19 – Jun 2
Sweet cornSow outdoors · May 19 – Jun 2
Cucumbers, squashSow outdoors · May 19 – Jun 2
Fall lettuce, spinachSow outdoors · Aug 10 – Aug 24
GarlicPlant cloves · Sep 21 – Oct 26
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 12) and first fall frost (Oct 5) 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 84336 came on Mar 20 — 14 days earlier than the 1991–2020 average (Apr 3).

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 6a in Utah

546 plants native to the lower 48 states, recorded in Utah, and rated by the USDA to survive −10 °F or colder — the bottom of zone 6a. Each links to its USDA PLANTS profile.

Trees 30

American beech80 ft · blooms mid spring · low shade tolerance · to −44 °FArizona cypress50 ft · blooms spring · low shade tolerance · to −23 °FArizona walnut50 ft · blooms late spring · high shade tolerance · to −33 °Fbalsam poplar80 ft · blooms late spring · high shade tolerance · to −79 °Fblack locust60 ft · blooms spring · high shade tolerance · to −37 °Fblack walnut100 ft · blooms late spring · high shade tolerance · to −28 °F

Shrubs 107

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 plum24 ft · blooms mid spring · high shade tolerance · to −38 °Fantelope bitterbrush6 ft · blooms early spring · medium shade tolerance · to −36 °FApache plume6 ft · blooms late spring · high shade tolerance · to −23 °F

Wildflowers & perennials 248

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 °FAmerican alpine speedwell1 ft · blooms summer · medium shade tolerance · to −28 °FAmerican bistort1.5 ft · blooms mid spring · high shade tolerance · to −38 °FAmerican licorice4 ft · blooms late spring · medium shade tolerance · to −38 °F

Grasses 151

alkali 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 °Farctic bluegrass2 ft · high shade tolerance · to −62 °F

Vines 3

trumpet creeper2 ft · blooms summer · high shade tolerance · to −13 °FVirginia creeper1 ft · blooms late spring · medium shade tolerance · to −28 °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 Snowville, UT.

Soil in Snowville, UT

The soil mapped at the center of ZIP 84336 is Mellor — silt loam, well drained.

TextureSilt loama good balance for most vegetables
pH8.8alkaline; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter1.5%low — add compost
Hydrologic groupDwater soaks in very slowly
Farmland classFarmland of statewide importanceUSDA classification

Map unit: Mellor-Thiokol silt loams, 1 to 6 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 84336; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Snowville, UT

Summer high90 °Faverage high, July
Winter low15 °Faverage low, January
Hot days37days a year at 90 °F or more
Freezing nights168nights a year at 32 °F or less
Growing degree days2,433base 50 °F — the season’s usable heat
Longest day15 h 14 mindaylight on June 21
Shortest day9 h 08 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation13.8 inper year, rain and melted snow

Average high and low, by month

0°10°20°30°40°50°60°70°80°90°100°32 °FJanuary: average high 33 °F, low 15 °F 33°15° JanFebruary: average high 37 °F, low 18 °F 37°18° FebMarch: average high 49 °F, low 28 °F 49°28° MarApril: average high 57 °F, low 33 °F 57°33° AprMay: average high 67 °F, low 42 °F 67°42° MayJune: average high 78 °F, low 48 °F 78°48° JunJuly: average high 90 °F, low 58 °F 90°58° JulAugust: average high 87 °F, low 56 °F 87°56° AugSeptember: average high 76 °F, low 46 °F 76°46° SepOctober: average high 61 °F, low 34 °F 61°34° OctNovember: average high 45 °F, low 24 °F 45°24° NovDecember: average high 34 °F, low 16 °F 34°16° Dec

Precipitation by month inches

0″1″2″January: 1.31 in precipitation 1.3 JanFebruary: 1.09 in precipitation 1.1 FebMarch: 1.54 in precipitation 1.5 MarApril: 1.50 in precipitation 1.5 AprMay: 1.77 in precipitation 1.8 MayJune: 1.21 in precipitation 1.2 JunJuly: 0.34 in precipitation 0.3 JulAugust: 0.45 in precipitation 0.5 AugSeptember: 1.00 in precipitation 1.0 SepOctober: 1.46 in precipitation 1.5 OctNovember: 0.79 in precipitation 0.8 NovDecember: 1.31 in precipitation 1.3 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Brigham City 28 Wnw, UT (24 mi away); precipitation: Brigham City 28 Wnw, UT (24 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

843166a
Howell, UT · 22 mi
843316a
Portage, UT · 26 mi
832436a
Holbrook, ID · 26 mi
833426a
Malta, ID · 27 mi
832526a
Malad City, ID · 31 mi
843076b
Corinne, UT · 32 mi
843296a
Park Valley, UT · 32 mi
843376b
Tremonton, UT · 32 mi

Utah planting zones →

Questions about 84336

What planting zone is ZIP code 84336?

ZIP code 84336 (Snowville, UT) is in USDA hardiness zone 6a on the 2023 map: the coldest night of an average winter reaches −10 to −5 °F (−23.3 to −20.6 °C).

When is the last frost in Snowville, UT?

The median last spring frost (32 °F) near 84336 is May 12; after June 8 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Brigham City 28 Wnw station.

When is the first frost in Snowville, UT?

The median first fall frost near 84336 is October 5, giving a median frost-free growing season of 144 days.

When should I plant tomatoes in 84336?

Start tomato seeds indoors around Mar 17 – Mar 31 and set transplants outside around May 19 – Jun 2, one to three weeks after the median last frost.

How much rain and snow does 84336 get?

About 13.8 inches of precipitation a year (NOAA 1991–2020 normals, Brigham City 28 Wnw station).

How hot do summers get in Snowville, UT?

The average high peaks at 90 °F in July, with about 37 days a year at 90 °F or more.

What kind of soil does 84336 have?

The USDA soil survey maps Mellor at the center of ZIP 84336: silt loam, well drained, pH about 8.8 (alkaline).

Did spring come early in Snowville, UT in 2026?

Spring leaf-out near 84336 came on Mar 20 in 2026, 14 days earlier than the 1991–2020 average (Apr 3), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Snowville, UT?

Long-day onions: the longest day near 84336 is 15 h 14 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).