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

Planting zone for 84530 — La Sal, UT

ZIP code 84530 (La Sal, San Juan County) is in USDA zone 7a: the coldest winter night averages 0 to 5 °F. The median last spring frost is May 17 and the first fall frost October 6.

Where ZIP 84530 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 frostMay 17

First frostOct 6

2012 zone6a

Was 6a on the 2012 map — a full zone warmer now. 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 La Sal, 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 La Sal, UT

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostMay 17median — 50% chance of a later frost

Safe for tender plantsJune 5only 10% chance of frost after

First fall frostOctober 6median — 10% chance by Sep 24

Growing season141 daysfrost-free, median

A hard freeze (28 °F) usually ends around May 4 and returns around October 14.

From the NOAA station La Sal 1sw, UT — 9 miles away, elevation 6,788 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 84530

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Apr 5 – Apr 19

SpinachSow outdoors · Apr 5 – Apr 26

Broccoli, cabbageStart indoors · Mar 8 – Mar 22

Broccoli, cabbageTransplant · Apr 26 – May 10

Onion setsPlant outdoors · Apr 19 – May 3

PotatoesPlant outdoors · Apr 26 – May 10

LettuceSow outdoors · Apr 19 – May 3

Carrots, beetsSow outdoors · Apr 26 – May 10

TomatoesStart indoors · Mar 22 – Apr 5

TomatoesTransplant · May 24 – Jun 7

Peppers, eggplantStart indoors · Mar 8 – Mar 22

Peppers, eggplantTransplant · May 31 – Jun 14

BeansSow outdoors · May 24 – Jun 7

Sweet cornSow outdoors · May 24 – Jun 7

Cucumbers, squashSow outdoors · May 24 – Jun 7

Fall lettuce, spinachSow outdoors · Aug 11 – Aug 25

GarlicPlant cloves · Sep 22 – Oct 27

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 17) and first fall frost (Oct 6) 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 84530 came on Mar 15 — 12 days earlier than the 1991–2020 average (Mar 27).

average
Mar 272026
Mar 15

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.

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 La Sal, UT.

Soil in La Sal, UT

The soil mapped at the center of ZIP 84530 is Windwhistle — very fine sandy loam, well drained.

TextureVery fine sandy loamdrains and warms fast; dries out and needs more feeding

pH7.9alkaline; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter2%moderate

Hydrologic groupBwater soaks in moderately

Farmland classNot prime farmlandUSDA classification

Map unit: Windwhistle-Sazi very fine sandy loams, 1 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 84530; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in La Sal, UT

Summer high86 °Faverage high, July

Winter low17 °Faverage low, January

Hot days19days a year at 90 °F or more

Freezing nights169nights a year at 32 °F or less

Growing degree days2,410base 50 °F — the season’s usable heat

Longest day14 h 50 mindaylight on June 21

Shortest day9 h 30 mindaylight on December 21

Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully

Precipitation12.7 inper year, rain and melted snow

Snowfall50 inper year; 59 days with snow on the ground

Average high and low, by month

Precipitation by month inches · ❄ = snowfall

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: La Sal 1sw, UT (9 mi away); precipitation: La Sal 1sw, UT (9 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

Monticello, UT · 28 mi

Utah planting zones →

Questions about 84530

What planting zone is ZIP code 84530?

ZIP code 84530 (La Sal, 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 La Sal, UT?

The median last spring frost (32 °F) near 84530 is May 17; after June 5 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, La Sal 1sw station.

When is the first frost in La Sal, UT?

The median first fall frost near 84530 is October 6, giving a median frost-free growing season of 141 days.

When should I plant tomatoes in 84530?

Start tomato seeds indoors around Mar 22 – Apr 5 and set transplants outside around May 24 – Jun 7, one to three weeks after the median last frost.

How much rain and snow does 84530 get?

About 12.7 inches of precipitation a year and 50 inches of snowfall (NOAA 1991–2020 normals, La Sal 1sw station).

How hot do summers get in La Sal, UT?

The average high peaks at 86 °F in July, with about 19 days a year at 90 °F or more.

What kind of soil does 84530 have?

The USDA soil survey maps Windwhistle at the center of ZIP 84530: very fine sandy loam, well drained, pH about 7.9 (alkaline).

Did spring come early in La Sal, UT in 2026?

Spring leaf-out near 84530 came on Mar 15 in 2026, 12 days earlier than the 1991–2020 average (Mar 27), according to the USA National Phenology Network Spring Index.

What kind of onions grow in La Sal, UT?

Intermediate onions: the longest day near 84530 is 14 h 50 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 84530 change?

Yes. The 2012 USDA map put 84530 in zone 6a; the 2023 map puts it in zone 7a. The newer map uses 1991–2020 data and more weather stations.