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

Planting zone for 84341 — Logan, UT

ZIP code 84341 (Logan, Cache County) is in USDA zone 6a: the coldest winter night averages −10 to −5 °F. The median last spring frost is April 30 and the first fall frost October 16.

Where ZIP 84341 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.

Zone6a−10 to −5 °F

Coldest night−23.3 to −20.6 °C

Last frostApr 30

First frostOct 16

2012 zone6a

Same zone as on the 2012 map. The zone is the one at the center of the ZIP code; hilly ZIPs can span two zones. What zone 6a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Logan, 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 Logan, UT

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostApril 30median — 50% chance of a later frost

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

First fall frostOctober 16median — 10% chance by Oct 1

Growing season166 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 15 and returns around October 27.

From the NOAA station Logan Utah St Univ, UT — 2 miles away, elevation 4,790 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 84341

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Mar 19 – Apr 2

SpinachSow outdoors · Mar 19 – Apr 9

Broccoli, cabbageStart indoors · Feb 19 – Mar 5

Broccoli, cabbageTransplant · Apr 9 – Apr 23

Onion setsPlant outdoors · Apr 2 – Apr 16

PotatoesPlant outdoors · Apr 9 – Apr 23

LettuceSow outdoors · Apr 2 – Apr 16

Carrots, beetsSow outdoors · Apr 9 – Apr 23

TomatoesStart indoors · Mar 5 – Mar 19

TomatoesTransplant · May 7 – May 21

Peppers, eggplantStart indoors · Feb 19 – Mar 5

Peppers, eggplantTransplant · May 14 – May 28

BeansSow outdoors · May 7 – May 21

Sweet cornSow outdoors · May 7 – May 21

Cucumbers, squashSow outdoors · May 7 – May 21

Fall lettuce, spinachSow outdoors · Aug 21 – Sep 4

GarlicPlant cloves · Oct 2 – Nov 6

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 30) and first fall frost (Oct 16) 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 84341 came on Mar 19 — 22 days earlier than the 1991–2020 average (Apr 10).

average
Apr 102026
Mar 19

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 6a in Utah

546 plants native to the lower 48 states, recorded in Utah, and rated by the USDA to survive −10 °F or colder — the bottom of zone 6a. 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 Logan, UT.

Soil in Logan, UT

The soil mapped at the center of ZIP 84341 is Green Canyon — gravelly loam, somewhat excessively drained.

TextureGravelly loama good balance for most vegetables

pH8.5alkaline; most vegetables like 6.0–7.0

DrainageSomewhat excessively drainednatural drainage class

Organic matter2%moderate

Hydrologic groupBwater soaks in moderately

Farmland classFarmland of statewide importanceUSDA classification

Map unit: GREEN CANYON GRAVELLY LOAM, 0 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 84341; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Logan, UT

Summer high88 °Faverage high, July

Winter low18 °Faverage low, January

Hot days32days a year at 90 °F or more

Freezing nights136nights a year at 32 °F or less

Growing degree days2,690base 50 °F — the season’s usable heat

Longest day15 h 13 mindaylight on June 21

Shortest day9 h 08 mindaylight on December 21

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

Precipitation18.1 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: Logan Utah St Univ, UT (2 mi away); precipitation: Hyde Park 1.0 Ssw, UT (within 1 mile). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 6a.

Providence, UT · 5 mi

843216a

Logan, UT · 5 mi

843356a

Smithfield, UT · 5 mi

843266a

Millville, UT · 7 mi

843046a

Cache Junction, UT · 9 mi

843336a

Richmond, UT · 10 mi

All 3 ZIP codes in Logan → · Utah planting zones →

Questions about 84341

What planting zone is ZIP code 84341?

ZIP code 84341 (Logan, UT) is in USDA hardiness zone 6a on the 2023 map: the coldest night of an average winter reaches −10 to −5 °F (−23.3 to −20.6 °C).

When is the last frost in Logan, UT?

The median last spring frost (32 °F) near 84341 is April 30; after May 19 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Logan Utah St Univ station.

When is the first frost in Logan, UT?

The median first fall frost near 84341 is October 16, giving a median frost-free growing season of 166 days.

When should I plant tomatoes in 84341?

Start tomato seeds indoors around Mar 5 – Mar 19 and set transplants outside around May 7 – May 21, one to three weeks after the median last frost.

How much rain and snow does 84341 get?

About 18.1 inches of precipitation a year (NOAA 1991–2020 normals, Hyde Park 1.0 Ssw station).

How hot do summers get in Logan, UT?

The average high peaks at 88 °F in July, with about 32 days a year at 90 °F or more.

What kind of soil does 84341 have?

The USDA soil survey maps Green Canyon at the center of ZIP 84341: gravelly loam, somewhat excessively drained, pH about 8.5 (alkaline).

Did spring come early in Logan, UT in 2026?

Spring leaf-out near 84341 came on Mar 19 in 2026, 22 days earlier than the 1991–2020 average (Apr 10), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Logan, UT?

Long-day onions: the longest day near 84341 is 15 h 13 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).