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

Planting zone for 84401 — Ogden, UT

ZIP code 84401 (Ogden, Weber County) is in USDA zone 7a: the coldest winter night averages 0 to 5 °F. The median last spring frost is April 22 and the first fall frost October 18.

Where ZIP 84401 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.

Zone7a0 to 5 °F
Coldest night−17.8 to −15 °C
Last frostApr 22
First frostOct 18
2012 zone7a

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 7a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Ogden, 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 Ogden, UT

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 22median — 50% chance of a later frost
Safe for tender plantsMay 9only 10% chance of frost after
First fall frostOctober 18median — 10% chance by Oct 1
Growing season177 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 3 and returns around October 29.

From the NOAA station Ogden Sugar Factory, UT — within 1 mile, elevation 4,282 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 84401

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 11 – Mar 25
SpinachSow outdoors · Mar 11 – Apr 1
Broccoli, cabbageStart indoors · Feb 11 – Feb 25
Broccoli, cabbageTransplant · Apr 1 – Apr 15
Onion setsPlant outdoors · Mar 25 – Apr 8
PotatoesPlant outdoors · Apr 1 – Apr 15
LettuceSow outdoors · Mar 25 – Apr 8
Carrots, beetsSow outdoors · Apr 1 – Apr 15
TomatoesStart indoors · Feb 25 – Mar 11
TomatoesTransplant · Apr 29 – May 13
Peppers, eggplantStart indoors · Feb 11 – Feb 25
Peppers, eggplantTransplant · May 6 – May 20
BeansSow outdoors · Apr 29 – May 13
Sweet cornSow outdoors · Apr 29 – May 13
Cucumbers, squashSow outdoors · Apr 29 – May 13
Fall lettuce, spinachSow outdoors · Aug 23 – Sep 6
GarlicPlant cloves · Oct 4 – Nov 8
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 22) and first fall frost (Oct 18) 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 84401 came on Mar 9 — 16 days earlier than the 1991–2020 average (Mar 25).

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 7a in Utah

561 plants native to the lower 48 states, recorded in Utah, and rated by the USDA to survive 0 °F or colder — the bottom of zone 7a. 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 112

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 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 °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 154

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 Ogden, UT.

Soil in Ogden, UT

The soil mapped at the center of ZIP 84401 is Layton — loamy fine sand, well drained.

TextureLoamy fine sanddrains and warms fast; dries out and needs more feeding
pH7.2neutral; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter1.5%low — add compost
Hydrologic groupAwater soaks in fast
Farmland classPrime farmland if irrigatedUSDA classification

Map unit: Layton loamy fine sand, 0 to 3 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 84401; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Ogden, UT

Summer high95 °Faverage high, July
Winter low20 °Faverage low, January
Hot days65days a year at 90 °F or more
Freezing nights128nights a year at 32 °F or less
Growing degree days3,409base 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)
Precipitation18.8 inper year, rain and melted snow

Average high and low, by month

10°20°30°40°50°60°70°80°90°100°110°32 °FJanuary: average high 38 °F, low 20 °F 38°20° JanFebruary: average high 44 °F, low 25 °F 44°25° FebMarch: average high 56 °F, low 32 °F 56°32° MarApril: average high 63 °F, low 39 °F 63°39° AprMay: average high 74 °F, low 47 °F 74°47° MayJune: average high 86 °F, low 55 °F 86°55° JunJuly: average high 95 °F, low 62 °F 95°62° JulAugust: average high 94 °F, low 60 °F 94°60° AugSeptember: average high 81 °F, low 51 °F 81°51° SepOctober: average high 67 °F, low 39 °F 67°39° OctNovember: average high 50 °F, low 29 °F 50°29° NovDecember: average high 39 °F, low 22 °F 39°22° Dec

Precipitation by month inches

0″1″2″3″January: 2.44 in precipitation 2.4 JanFebruary: 1.71 in precipitation 1.7 FebMarch: 1.66 in precipitation 1.7 MarApril: 1.94 in precipitation 1.9 AprMay: 1.98 in precipitation 2.0 MayJune: 1.51 in precipitation 1.5 JunJuly: 0.56 in precipitation 0.6 JulAugust: 0.59 in precipitation 0.6 AugSeptember: 1.25 in precipitation 1.3 SepOctober: 1.57 in precipitation 1.6 OctNovember: 1.46 in precipitation 1.5 NovDecember: 2.14 in precipitation 2.1 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Ogden Sugar Factory, UT (within 1 mile); precipitation: Ogden Sugar Factory, UT (within 1 mile). 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.

840677a
Roy, UT · 3 mi
844077a
Ogden, UT · 4 mi
842447a
Ogden, UT · 5 mi
844027a
Ogden, UT · 5 mi
844097a
Ogden, UT · 5 mi
844127a
Ogden, UT · 5 mi
844156b
Ogden, UT · 5 mi
844086b
Ogden, UT · 5 mi

All 12 ZIP codes in Ogden → · Utah planting zones →

Questions about 84401

What planting zone is ZIP code 84401?

ZIP code 84401 (Ogden, UT) is in USDA hardiness zone 7a on the 2023 map: the coldest night of an average winter reaches 0 to 5 °F (−17.8 to −15 °C).

When is the last frost in Ogden, UT?

The median last spring frost (32 °F) near 84401 is April 22; after May 9 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Ogden Sugar Factory station.

When is the first frost in Ogden, UT?

The median first fall frost near 84401 is October 18, giving a median frost-free growing season of 177 days.

When should I plant tomatoes in 84401?

Start tomato seeds indoors around Feb 25 – Mar 11 and set transplants outside around Apr 29 – May 13, one to three weeks after the median last frost.

How much rain and snow does 84401 get?

About 18.8 inches of precipitation a year (NOAA 1991–2020 normals, Ogden Sugar Factory station).

How hot do summers get in Ogden, UT?

The average high peaks at 95 °F in July, with about 65 days a year at 90 °F or more.

What kind of soil does 84401 have?

The USDA soil survey maps Layton at the center of ZIP 84401: loamy fine sand, well drained, pH about 7.2 (neutral).

Did spring come early in Ogden, UT in 2026?

Spring leaf-out near 84401 came on Mar 9 in 2026, 16 days earlier than the 1991–2020 average (Mar 25), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Ogden, UT?

Long-day onions: the longest day near 84401 is 15 h 09 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).