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

Planting zone for Logan, UT

Logan, UT is in USDA zone 6a across its 3 ZIP codes. The median last spring frost is April 30 and the first fall frost October 16.

Logan on the zone map

Outlined: its 2 ZIP code areas · 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
ZIP codes3
Last frostApr 30
First frostOct 16
Growing season166 days

6a 3 ZIPs

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, 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 Logan

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).

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.

Trees 30

American beech80 ft · blooms mid spring · low shade tolerance · to −44 °FArizona cypress50 ft · blooms spring · low shade tolerance · to −23 °FArizona walnut50 ft · blooms late spring · high shade tolerance · to −33 °Fbalsam poplar80 ft · blooms late spring · high shade tolerance · to −79 °Fblack locust60 ft · blooms spring · high shade tolerance · to −37 °Fblack walnut100 ft · blooms late spring · high shade tolerance · to −28 °F

Shrubs 107

alderleaf buckthorn3 ft · blooms late spring · low shade tolerance · to −33 °Falderleaf mountain mahogany15 ft · blooms late spring · medium shade tolerance · to −41 °Falpine laurel1 ft · blooms late spring · low shade tolerance · to −28 °FAmerican plum24 ft · blooms mid spring · high shade tolerance · to −38 °Fantelope bitterbrush6 ft · blooms early spring · medium shade tolerance · to −36 °FApache plume6 ft · blooms late spring · high shade tolerance · to −23 °F

Wildflowers & perennials 248

alkali buttercup1 ft · blooms late spring · low shade tolerance · to −38 °Falpine bistort1 ft · blooms mid spring · high shade tolerance · to −38 °Falpine mountainsorrel1 ft · blooms mid summer · medium shade tolerance · to −43 °FAmerican alpine speedwell1 ft · blooms summer · medium shade tolerance · to −28 °FAmerican bistort1.5 ft · blooms mid spring · high shade tolerance · to −38 °FAmerican licorice4 ft · blooms late spring · medium shade tolerance · to −38 °F

Grasses 151

alkali cordgrass3 ft · blooms late summer · high shade tolerance · to −38 °Falkali sacaton3 ft · blooms mid summer · high shade tolerance · to −38 °FAlpine Meadow-Foxtail0.5 ft · blooms mid spring · medium shade tolerance · to −33 °Falpine timothy1.4 ft · blooms late spring · medium shade tolerance · to −43 °Fanalogue sedge1.5 ft · blooms late spring · medium shade tolerance · to −38 °Farctic bluegrass2 ft · high shade tolerance · to −62 °F

Vines 3

trumpet creeper2 ft · blooms summer · high shade tolerance · to −13 °FVirginia creeper1 ft · blooms late spring · medium shade tolerance · to −28 °Fwestern white clematis1 ft · blooms mid summer · medium shade tolerance · to −38 °F

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

10°20°30°40°50°60°70°80°90°100°32 °FJanuary: average high 32 °F, low 18 °F 32°18° JanFebruary: average high 37 °F, low 21 °F 37°21° FebMarch: average high 48 °F, low 30 °F 48°30° MarApril: average high 57 °F, low 36 °F 57°36° AprMay: average high 67 °F, low 44 °F 67°44° MayJune: average high 78 °F, low 52 °F 78°52° JunJuly: average high 88 °F, low 60 °F 88°60° JulAugust: average high 87 °F, low 59 °F 87°59° AugSeptember: average high 76 °F, low 50 °F 76°50° SepOctober: average high 61 °F, low 39 °F 61°39° OctNovember: average high 45 °F, low 29 °F 45°29° NovDecember: average high 34 °F, low 19 °F 34°19° Dec

Precipitation by month inches

0″1″2″3″January: 1.74 in precipitation 1.7 JanFebruary: 1.51 in precipitation 1.5 FebMarch: 1.78 in precipitation 1.8 MarApril: 2.58 in precipitation 2.6 AprMay: 1.94 in precipitation 1.9 MayJune: 1.27 in precipitation 1.3 JunJuly: 0.53 in precipitation 0.5 JulAugust: 0.73 in precipitation 0.7 AugSeptember: 1.47 in precipitation 1.5 SepOctober: 1.76 in precipitation 1.8 OctNovember: 1.35 in precipitation 1.4 NovDecember: 1.49 in precipitation 1.5 Dec

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.

ZIP codes in Logan

843216a
−10 to −5 °F
843236a
−10 to −5 °F
843416a
−10 to −5 °F

Utah planting zones →

Questions about Logan

What planting zone is Logan, UT?

Logan, UT is in USDA hardiness zone 6a on the 2023 map (6a: −10 to −5 °F).

When is the last frost in Logan, UT?

The median last spring frost is April 30 and the median first fall frost is October 16 (NOAA 1991–2020 normals, Logan Utah St Univ station).

When can I plant a garden in Logan, UT?

Cool-season crops like peas and spinach go in around Mar 19 – Apr 9; tomatoes, peppers, beans and squash after about May 7, once frost risk has passed.

What kind of onions grow in Logan, UT?

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

How much rain and snow does Logan, UT get?

About 18.1 inches of precipitation a year (NOAA 1991–2020 normals).