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

Planting zone for 84044 — Magna, UT

ZIP code 84044 (Magna, Salt Lake County) is in USDA zone 7b: the coldest winter night averages 5 to 10 °F. The median last spring frost is April 3 and the first fall frost November 4.

Where ZIP 84044 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 3

First frostNov 4

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 Magna, 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 Magna, UT

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostApril 3median — 50% chance of a later frost

Safe for tender plantsApril 19only 10% chance of frost after

First fall frostNovember 4median — 10% chance by Oct 18

Growing season213 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 11 and returns around November 13.

From the NOAA station Garfield, UT — 4 miles away, elevation 4,298 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 84044

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Feb 20 – Mar 6

SpinachSow outdoors · Feb 20 – Mar 13

Broccoli, cabbageStart indoors · Jan 23 – Feb 6

Broccoli, cabbageTransplant · Mar 13 – Mar 27

Onion setsPlant outdoors · Mar 6 – Mar 20

PotatoesPlant outdoors · Mar 13 – Mar 27

LettuceSow outdoors · Mar 6 – Mar 20

Carrots, beetsSow outdoors · Mar 13 – Mar 27

TomatoesStart indoors · Feb 6 – Feb 20

TomatoesTransplant · Apr 10 – Apr 24

Peppers, eggplantStart indoors · Jan 23 – Feb 6

Peppers, eggplantTransplant · Apr 17 – May 1

BeansSow outdoors · Apr 10 – Apr 24

Sweet cornSow outdoors · Apr 10 – Apr 24

Cucumbers, squashSow outdoors · Apr 10 – Apr 24

Fall lettuce, spinachSow outdoors · Sep 9 – Sep 23

GarlicPlant cloves · Oct 21 – Nov 25

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 3) and first fall frost (Nov 4) 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 84044 came on Mar 8 — 13 days earlier than the 1991–2020 average (Mar 21).

average
Mar 212026
Mar 8

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 Magna, UT.

Soil in Magna, UT

The center of ZIP 84044 is mapped as Mine wash: built-over ground without natural soil data. Garden soil here is usually imported or disturbed — test before you plant.

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 84044; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Magna, UT

Summer high91 °Faverage high, July

Winter low25 °Faverage low, January

Hot days58days a year at 90 °F or more

Freezing nights97nights a year at 32 °F or less

Growing degree days3,826base 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)

Precipitation17.7 inper year, rain and melted snow

Snowfall23 inper year

Average high and low, by month

Precipitation by month inches · ❄ = snowfall

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Garfield, UT (4 mi away); precipitation: Garfield, UT (4 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

841287b

West Valley City, UT · 5 mi

841207b

West Valley City, UT · 7 mi

841187b

Salt Lake City, UT · 7 mi

841047b

Salt Lake City, UT · 7 mi

841197b

West Valley City, UT · 9 mi

841847b

Salt Lake City, UT · 10 mi

841997b

Salt Lake City, UT · 10 mi

840067a

Bingham Canyon, UT · 10 mi

Utah planting zones →

Questions about 84044

What planting zone is ZIP code 84044?

ZIP code 84044 (Magna, 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 Magna, UT?

The median last spring frost (32 °F) near 84044 is April 3; after April 19 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Garfield station.

When is the first frost in Magna, UT?

The median first fall frost near 84044 is November 4, giving a median frost-free growing season of 213 days.

When should I plant tomatoes in 84044?

Start tomato seeds indoors around Feb 6 – Feb 20 and set transplants outside around Apr 10 – Apr 24, one to three weeks after the median last frost.

How much rain and snow does 84044 get?

About 17.7 inches of precipitation a year and 23 inches of snowfall (NOAA 1991–2020 normals, Garfield station).

How hot do summers get in Magna, UT?

The average high peaks at 91 °F in July, with about 58 days a year at 90 °F or more.

Did spring come early in Magna, UT in 2026?

Spring leaf-out near 84044 came on Mar 8 in 2026, 13 days earlier than the 1991–2020 average (Mar 21), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Magna, UT?

Long-day onions: the longest day near 84044 is 15 h 06 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 84044 change?

Yes. The 2012 USDA map put 84044 in zone 7a; the 2023 map puts it in zone 7b. The newer map uses 1991–2020 data and more weather stations.