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

Planting zone for 84092 — Sandy, UT

ZIP code 84092 (Sandy, Salt Lake County) is in USDA zone 6b: the coldest winter night averages −5 to 0 °F. The median last spring frost is June 11 and the first fall frost September 18.

Where ZIP 84092 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.

Zone6b−5 to 0 °F

Coldest night−20.6 to −17.8 °C

Last frostJun 11

First frostSep 18

2012 zone7a

Was 7a on the 2012 map — half a zone colder now. The zone is the one at the center of the ZIP code; hilly ZIPs can span two zones. What zone 6b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Sandy, 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 Sandy, UT

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostJune 11median — 50% chance of a later frost

Safe for tender plantsJune 27only 10% chance of frost after

First fall frostSeptember 18median — 10% chance by Sep 3

Growing season98 daysfrost-free, median

A hard freeze (28 °F) usually ends around June 1 and returns around September 27.

From the NOAA station Alta, UT — 5 miles away, elevation 8,711 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 84092

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Apr 30 – May 14

SpinachSow outdoors · Apr 30 – May 21

Broccoli, cabbageStart indoors · Apr 2 – Apr 16

Broccoli, cabbageTransplant · May 21 – Jun 4

Onion setsPlant outdoors · May 14 – May 28

PotatoesPlant outdoors · May 21 – Jun 4

LettuceSow outdoors · May 14 – May 28

Carrots, beetsSow outdoors · May 21 – Jun 4

TomatoesStart indoors · Apr 16 – Apr 30

TomatoesTransplant · Jun 18 – Jul 2

Peppers, eggplantStart indoors · Apr 2 – Apr 16

Peppers, eggplantTransplant · Jun 25 – Jul 9

BeansSow outdoors · Jun 18 – Jul 2

Sweet cornSow outdoors · Jun 18 – Jul 2

Cucumbers, squashSow outdoors · Jun 18 – Jul 2

Fall lettuce, spinachSow outdoors · Jul 24 – Aug 7

GarlicPlant cloves · Sep 4 – Oct 9

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Jun 11) and first fall frost (Sep 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 84092 came on Apr 30 — 16 days earlier than the 1991–2020 average (May 16).

average
May 162026
Apr 30

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 6b in Utah

549 plants native to the lower 48 states, recorded in Utah, and rated by the USDA to survive −5 °F or colder — the bottom of zone 6b. 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 Sandy, UT.

Soil in Sandy, UT

The soil mapped at the center of ZIP 84092 is Dromedary — gravelly loam, well drained.

TextureGravelly loama good balance for most vegetables

pH6.7neutral; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter4%moderate

Hydrologic groupBwater soaks in moderately

Farmland classNot prime farmlandUSDA classification

Map unit: Dromedary-Rock outcrop complex, 30 to 70 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 84092; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Sandy, UT

Summer high73 °Faverage high, July

Winter low15 °Faverage low, January

Hot days0days a year at 90 °F or more

Freezing nights209nights a year at 32 °F or less

Growing degree days1,000base 50 °F — the season’s usable heat

Longest day15 h 05 mindaylight on June 21

Shortest day9 h 16 mindaylight on December 21

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

Precipitation54.8 inper year, rain and melted snow

Average high and low, by month

Precipitation by month inches

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Alta, UT (5 mi away); precipitation: Snowbird, UT (3 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

840047a

Alpine, UT · 4 mi

841216a

Salt Lake City, UT · 5 mi

840036a

American Fork, UT · 6 mi

Salt Lake City, UT · 10 mi

All 6 ZIP codes in Sandy → · Utah planting zones →

Questions about 84092

What planting zone is ZIP code 84092?

ZIP code 84092 (Sandy, UT) is in USDA hardiness zone 6b on the 2023 map: the coldest night of an average winter reaches −5 to 0 °F (−20.6 to −17.8 °C).

When is the last frost in Sandy, UT?

The median last spring frost (32 °F) near 84092 is June 11; after June 27 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Alta station.

When is the first frost in Sandy, UT?

The median first fall frost near 84092 is September 18, giving a median frost-free growing season of 98 days.

When should I plant tomatoes in 84092?

Start tomato seeds indoors around Apr 16 – Apr 30 and set transplants outside around Jun 18 – Jul 2, one to three weeks after the median last frost.

How much rain and snow does 84092 get?

About 54.8 inches of precipitation a year (NOAA 1991–2020 normals, Snowbird station).

How hot do summers get in Sandy, UT?

The average high peaks at 73 °F in July, with about 0 days a year at 90 °F or more.

What kind of soil does 84092 have?

The USDA soil survey maps Dromedary at the center of ZIP 84092: gravelly loam, well drained, pH about 6.7 (neutral).

Did spring come early in Sandy, UT in 2026?

Spring leaf-out near 84092 came on Apr 30 in 2026, 16 days earlier than the 1991–2020 average (May 16), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Sandy, UT?

Long-day onions: the longest day near 84092 is 15 h 05 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 84092 change?

Yes. The 2012 USDA map put 84092 in zone 7a; the 2023 map puts it in zone 6b. The newer map uses 1991–2020 data and more weather stations.