Data: 2023 USDA zones (PRISM/OSU) · NOAA 1991–2020 normals · updated Oct 29, 2026

Planting zone for 84098 — Park City, UT

ZIP code 84098 (Park City, Summit County) is in USDA zone 5b: the coldest winter night averages −15 to −10 °F. The median last spring frost is May 29 and the first fall frost September 25.

Where ZIP 84098 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 frostMay 29

First frostSep 25

2012 zone5a

Was 5a 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 5b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Park City, 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 Park City, UT

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostMay 29median — 50% chance of a later frost

Safe for tender plantsJune 14only 10% chance of frost after

First fall frostSeptember 25median — 10% chance by Sep 12

Growing season117 daysfrost-free, median

A hard freeze (28 °F) usually ends around May 12 and returns around October 6.

From the NOAA station Park City, UT — 6 miles away, elevation 6,900 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 84098

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Apr 17 – May 1

SpinachSow outdoors · Apr 17 – May 8

Broccoli, cabbageStart indoors · Mar 20 – Apr 3

Broccoli, cabbageTransplant · May 8 – May 22

Onion setsPlant outdoors · May 1 – May 15

PotatoesPlant outdoors · May 8 – May 22

LettuceSow outdoors · May 1 – May 15

Carrots, beetsSow outdoors · May 8 – May 22

TomatoesStart indoors · Apr 3 – Apr 17

TomatoesTransplant · Jun 5 – Jun 19

Peppers, eggplantStart indoors · Mar 20 – Apr 3

Peppers, eggplantTransplant · Jun 12 – Jun 26

BeansSow outdoors · Jun 5 – Jun 19

Sweet cornSow outdoors · Jun 5 – Jun 19

Cucumbers, squashSow outdoors · Jun 5 – Jun 19

Fall lettuce, spinachSow outdoors · Jul 31 – Aug 14

GarlicPlant cloves · Sep 11 – Oct 16

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 29) and first fall frost (Sep 25) 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 84098 came on Mar 28 — 25 days earlier than the 1991–2020 average (Apr 22).

average
Apr 222026
Mar 28

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 Utah

517 plants native to the lower 48 states, recorded in Utah, and rated by the USDA to survive −15 °F or colder — the bottom of zone 5b. 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 Park City, UT.

Soil in Park City, UT

The soil mapped at the center of ZIP 84098 is Yeates Hollow — very stony loam, well drained.

TextureVery stony loama good balance for most vegetables

pH6.5neutral; 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-Henefer complex, 15 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 84098; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Park City, UT

Summer high80 °Faverage high, July

Winter low16 °Faverage low, January

Hot days5days a year at 90 °F or more

Freezing nights202nights a year at 32 °F or less

Growing degree days1,616base 50 °F — the season’s usable heat

Longest day15 h 06 mindaylight on June 21

Shortest day9 h 15 mindaylight on December 21

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

Precipitation21.6 inper year, rain and melted snow

Snowfall153 inper year

Average high and low, by month

Precipitation by month inches · ❄ = snowfall

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Park City, UT (6 mi away); precipitation: Snyderville, UT (3 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.

Salt Lake City, UT · 9 mi

841086b

Salt Lake City, UT · 11 mi

840615b

Peoa, UT · 11 mi

841216a

Salt Lake City, UT · 12 mi

841587a

Salt Lake City, UT · 12 mi

841247b

Salt Lake City, UT · 15 mi

All 3 ZIP codes in Park City → · Utah planting zones →

Questions about 84098

What planting zone is ZIP code 84098?

ZIP code 84098 (Park City, UT) 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 Park City, UT?

The median last spring frost (32 °F) near 84098 is May 29; after June 14 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Park City station.

When is the first frost in Park City, UT?

The median first fall frost near 84098 is September 25, giving a median frost-free growing season of 117 days.

When should I plant tomatoes in 84098?

Start tomato seeds indoors around Apr 3 – Apr 17 and set transplants outside around Jun 5 – Jun 19, one to three weeks after the median last frost.

How much rain and snow does 84098 get?

About 21.6 inches of precipitation a year and 153 inches of snowfall (NOAA 1991–2020 normals, Snyderville station).

How hot do summers get in Park City, UT?

The average high peaks at 80 °F in July, with about 5 days a year at 90 °F or more.

What kind of soil does 84098 have?

The USDA soil survey maps Yeates Hollow at the center of ZIP 84098: very stony loam, well drained, pH about 6.5 (neutral).

Did spring come early in Park City, UT in 2026?

Spring leaf-out near 84098 came on Mar 28 in 2026, 25 days earlier than the 1991–2020 average (Apr 22), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Park City, UT?

Long-day onions: the longest day near 84098 is 15 h 06 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 84098 change?

Yes. The 2012 USDA map put 84098 in zone 5a; the 2023 map puts it in zone 5b. The newer map uses 1991–2020 data and more weather stations.