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

Planting zone for 84118 — Salt Lake City, UT

ZIP code 84118 (Salt Lake City, Salt Lake County) is in USDA zone 7b: the coldest winter night averages 5 to 10 °F. The median last spring frost is April 8 and the first fall frost October 31.

Where ZIP 84118 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.

Zone7b5 to 10 °F

Coldest night−15 to −12.2 °C

Last frostApr 8

First frostOct 31

2012 zone7a

Was 7a 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 7b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Salt Lake 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 Salt Lake City, UT

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostApril 8median — 50% chance of a later frost

Safe for tender plantsApril 30only 10% chance of frost after

First fall frostOctober 31median — 10% chance by Oct 17

Growing season204 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 15 and returns around November 10.

From the NOAA station Salt Lake City Intl Airport, UT — 9 miles away, elevation 4,226 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 84118

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Feb 25 – Mar 11

SpinachSow outdoors · Feb 25 – Mar 18

Broccoli, cabbageStart indoors · Jan 28 – Feb 11

Broccoli, cabbageTransplant · Mar 18 – Apr 1

Onion setsPlant outdoors · Mar 11 – Mar 25

PotatoesPlant outdoors · Mar 18 – Apr 1

LettuceSow outdoors · Mar 11 – Mar 25

Carrots, beetsSow outdoors · Mar 18 – Apr 1

TomatoesStart indoors · Feb 11 – Feb 25

TomatoesTransplant · Apr 15 – Apr 29

Peppers, eggplantStart indoors · Jan 28 – Feb 11

Peppers, eggplantTransplant · Apr 22 – May 6

BeansSow outdoors · Apr 15 – Apr 29

Sweet cornSow outdoors · Apr 15 – Apr 29

Cucumbers, squashSow outdoors · Apr 15 – Apr 29

Fall lettuce, spinachSow outdoors · Sep 5 – Sep 19

GarlicPlant cloves · Oct 17 – Nov 21

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 8) and first fall frost (Oct 31) 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 84118 came on Mar 4 — 19 days earlier than the 1991–2020 average (Mar 23).

average
Mar 232026
Mar 4

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 7b in Utah

562 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 7b. 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 Salt Lake City, UT.

Soil in Salt Lake City, UT

The soil mapped at the center of ZIP 84118 is Bingham — gravelly loam, well drained.

TextureGravelly loama good balance for most vegetables

pH7.0neutral; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter2%moderate

Hydrologic groupCwater soaks in slowly

Farmland classPrime farmland if irrigatedUSDA classification

Map unit: Bingham gravelly loam, 3 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 84118; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Salt Lake City, UT

Summer high94 °Faverage high, July

Winter low24 °Faverage low, January

Hot days62days a year at 90 °F or more

Freezing nights112nights a year at 32 °F or less

Growing degree days3,827base 50 °F — the season’s usable heat

Longest day15 h 05 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)

Precipitation20.2 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: Salt Lake City Intl Airport, UT (9 mi away); precipitation: Taylorsville-Bennion 2.0 Wsw, UT (3 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 7b.

841287b

West Valley City, UT · 3 mi

841207b

West Valley City, UT · 3 mi

840817b

West Jordan, UT · 4 mi

841297b

Salt Lake City, UT · 4 mi

840847b

West Jordan, UT · 4 mi

841847b

Salt Lake City, UT · 4 mi

841197b

West Valley City, UT · 6 mi

840887b

West Jordan, UT · 6 mi

All 47 ZIP codes in Salt Lake City → · Utah planting zones →

Questions about 84118

What planting zone is ZIP code 84118?

ZIP code 84118 (Salt Lake City, UT) is in USDA hardiness zone 7b on the 2023 map: the coldest night of an average winter reaches 5 to 10 °F (−15 to −12.2 °C).

When is the last frost in Salt Lake City, UT?

The median last spring frost (32 °F) near 84118 is April 8; after April 30 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Salt Lake City Intl Airport station.

When is the first frost in Salt Lake City, UT?

The median first fall frost near 84118 is October 31, giving a median frost-free growing season of 204 days.

When should I plant tomatoes in 84118?

Start tomato seeds indoors around Feb 11 – Feb 25 and set transplants outside around Apr 15 – Apr 29, one to three weeks after the median last frost.

How much rain and snow does 84118 get?

About 20.2 inches of precipitation a year (NOAA 1991–2020 normals, Taylorsville-Bennion 2.0 Wsw station).

How hot do summers get in Salt Lake City, UT?

The average high peaks at 94 °F in July, with about 62 days a year at 90 °F or more.

What kind of soil does 84118 have?

The USDA soil survey maps Bingham at the center of ZIP 84118: gravelly loam, well drained, pH about 7.0 (neutral).

Did spring come early in Salt Lake City, UT in 2026?

Spring leaf-out near 84118 came on Mar 4 in 2026, 19 days earlier than the 1991–2020 average (Mar 23), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Salt Lake City, UT?

Long-day onions: the longest day near 84118 is 15 h 05 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 84118 change?

Yes. The 2012 USDA map put 84118 in zone 7a; the 2023 map puts it in zone 7b. The newer map uses 1991–2020 data and more weather stations.