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

Planting zone for 84317 — Huntsville, UT

ZIP code 84317 (Huntsville, Weber County) is in USDA zone 6a: the coldest winter night averages −10 to −5 °F. The median last spring frost is June 4 and the first fall frost September 16.

Where ZIP 84317 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 frostJun 4
First frostSep 16
2012 zone5b

Was 5b 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 6a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Huntsville, 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 Huntsville, UT

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostJune 4median — 50% chance of a later frost
Safe for tender plantsJune 22only 10% chance of frost after
First fall frostSeptember 16median — 10% chance by Sep 1
Growing season102 daysfrost-free, median

A hard freeze (28 °F) usually ends around May 13 and returns around September 28.

From the NOAA station Huntsville Monastery, UT — 7 miles away, elevation 5,141 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 84317

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Apr 23 – May 7
SpinachSow outdoors · Apr 23 – May 14
Broccoli, cabbageStart indoors · Mar 26 – Apr 9
Broccoli, cabbageTransplant · May 14 – May 28
Onion setsPlant outdoors · May 7 – May 21
PotatoesPlant outdoors · May 14 – May 28
LettuceSow outdoors · May 7 – May 21
Carrots, beetsSow outdoors · May 14 – May 28
TomatoesStart indoors · Apr 9 – Apr 23
TomatoesTransplant · Jun 11 – Jun 25
Peppers, eggplantStart indoors · Mar 26 – Apr 9
Peppers, eggplantTransplant · Jun 18 – Jul 2
BeansSow outdoors · Jun 11 – Jun 25
Sweet cornSow outdoors · Jun 11 – Jun 25
Cucumbers, squashSow outdoors · Jun 11 – Jun 25
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 4) 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 84317 came on Mar 25 — 24 days earlier than the 1991–2020 average (Apr 18).

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 Huntsville, UT.

Soil in Huntsville, UT

The soil mapped at the center of ZIP 84317 is Yeates Hollow — very stony loam, well drained.

TextureVery stony loama good balance for most vegetables
pH6.3slightly acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter3.5%moderate
Hydrologic groupCwater soaks in slowly
Farmland classNot prime farmlandUSDA classification

Map unit: Yeates Hollow very stony loam, 10 to 30 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 84317; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Huntsville, UT

Summer high90 °Faverage high, July
Winter low11 °Faverage low, January
Hot days39days a year at 90 °F or more
Freezing nights204nights a year at 32 °F or less
Growing degree days2,082base 50 °F — the season’s usable heat
Longest day15 h 10 mindaylight on June 21
Shortest day9 h 11 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation21.1 inper year, rain and melted snow
Snowfall82 inper year

Average high and low, by month

0°10°20°30°40°50°60°70°80°90°100°32 °FJanuary: average high 34 °F, low 11 °F 34°11° JanFebruary: average high 41 °F, low 15 °F 41°15° FebMarch: average high 51 °F, low 24 °F 51°24° MarApril: average high 60 °F, low 31 °F 60°31° AprMay: average high 71 °F, low 37 °F 71°37° MayJune: average high 82 °F, low 43 °F 82°43° JunJuly: average high 90 °F, low 49 °F 90°49° JulAugust: average high 89 °F, low 47 °F 89°47° AugSeptember: average high 79 °F, low 39 °F 79°39° SepOctober: average high 64 °F, low 30 °F 64°30° OctNovember: average high 48 °F, low 22 °F 48°22° NovDecember: average high 35 °F, low 13 °F 35°13° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″3″January: 2.76 in precipitation, 22.5 in snowfall 2.8❄23 JanFebruary: 2.19 in precipitation, 17.4 in snowfall 2.2❄17 FebMarch: 2.00 in precipitation, 7.2 in snowfall 2.0❄7 MarApril: 1.90 in precipitation, 3.1 in snowfall 1.9❄3 AprMay: 2.14 in precipitation, 0.3 in snowfall 2.1 MayJune: 1.34 in precipitation 1.3 JunJuly: 0.69 in precipitation 0.7 JulAugust: 0.78 in precipitation 0.8 AugSeptember: 1.31 in precipitation 1.3 SepOctober: 1.79 in precipitation, 1.8 in snowfall 1.8❄2 OctNovember: 1.80 in precipitation, 7.3 in snowfall 1.8❄7 NovDecember: 2.44 in precipitation, 22.8 in snowfall 2.4❄23 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Huntsville Monastery, UT (7 mi away); precipitation: Huntsville Monastery, UT (7 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

840186a
Croydon, UT · 11 mi
843106a
Eden, UT · 12 mi
844036b
Ogden, UT · 15 mi
842447a
Ogden, UT · 18 mi
844027a
Ogden, UT · 18 mi
844097a
Ogden, UT · 18 mi
844127a
Ogden, UT · 18 mi
844156b
Ogden, UT · 18 mi

Utah planting zones →

Questions about 84317

What planting zone is ZIP code 84317?

ZIP code 84317 (Huntsville, 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 Huntsville, UT?

The median last spring frost (32 °F) near 84317 is June 4; after June 22 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Huntsville Monastery station.

When is the first frost in Huntsville, UT?

The median first fall frost near 84317 is September 16, giving a median frost-free growing season of 102 days.

When should I plant tomatoes in 84317?

Start tomato seeds indoors around Apr 9 – Apr 23 and set transplants outside around Jun 11 – Jun 25, one to three weeks after the median last frost.

How much rain and snow does 84317 get?

About 21.1 inches of precipitation a year and 82 inches of snowfall (NOAA 1991–2020 normals, Huntsville Monastery station).

How hot do summers get in Huntsville, UT?

The average high peaks at 90 °F in July, with about 39 days a year at 90 °F or more.

What kind of soil does 84317 have?

The USDA soil survey maps Yeates Hollow at the center of ZIP 84317: very stony loam, well drained, pH about 6.3 (slightly acidic).

Did spring come early in Huntsville, UT in 2026?

Spring leaf-out near 84317 came on Mar 25 in 2026, 24 days earlier than the 1991–2020 average (Apr 18), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Huntsville, UT?

Long-day onions: the longest day near 84317 is 15 h 10 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 84317 change?

Yes. The 2012 USDA map put 84317 in zone 5b; the 2023 map puts it in zone 6a. The newer map uses 1991–2020 data and more weather stations.