Data: 2023 USDA zones (PRISM/OSU) · NOAA 1991–2020 normals · updated Oct 30, 2026

Planting zone for Kodiak, AK

Kodiak, AK is in USDA zones 7a to 7b across its 3 ZIP codes. The median last spring frost is April 29 and the first fall frost October 14.

Kodiak on the zone map

Outlined: its 1 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.

Zones7a–7b0 to 10 °F

ZIP codes3

Last frostApr 29

First frostOct 14

Growing season168 days

7a 1 ZIP 7b 2 ZIPs

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Kodiak, AK…

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 Kodiak, AK

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostApril 29median — 50% chance of a later frost

Safe for tender plantsMay 13only 10% chance of frost after

First fall frostOctober 14median — 10% chance by Sep 30

Growing season168 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 11 and returns around October 26.

From the NOAA station Kodiak Wwtp, AK, elevation 56 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 Kodiak

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Mar 18 – Apr 1

SpinachSow outdoors · Mar 18 – Apr 8

Broccoli, cabbageStart indoors · Feb 18 – Mar 4

Broccoli, cabbageTransplant · Apr 8 – Apr 22

Onion setsPlant outdoors · Apr 1 – Apr 15

PotatoesPlant outdoors · Apr 8 – Apr 22

LettuceSow outdoors · Apr 1 – Apr 15

Carrots, beetsSow outdoors · Apr 8 – Apr 22

TomatoesStart indoors · Mar 4 – Mar 18

TomatoesTransplant · May 6 – May 20

Peppers, eggplantStart indoors · Feb 18 – Mar 4

Peppers, eggplantTransplant · May 13 – May 27

BeansSow outdoors · May 6 – May 20

Sweet cornSow outdoors · May 6 – May 20

Cucumbers, squashSow outdoors · May 6 – May 20

Fall lettuce, spinachSow outdoors · Aug 19 – Sep 2

GarlicPlant cloves · Sep 30 – Nov 4

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 29) and first fall frost (Oct 14) 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.

Native plants for zone 7a in Alaska

289 plants native to Alaska, recorded in Alaska, 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 Kodiak, AK.

Soil in Kodiak, AK

The soil mapped at the center of ZIP 99619 is Kodiak — moderately decomposed plant material, well drained. Much of the area is built over (urban land); this is the natural soil underneath.

TextureModerately decomposed plant materialtop layer

pH5.2strongly acidic; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter75%high

Hydrologic groupAwater soaks in fast

Farmland classNot prime farmlandUSDA classification

Map unit: Urban land-Kodiak-Izhut complex, 0 to 15 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 99619; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Kodiak, AK

Summer high61 °Faverage high, August

Winter low27 °Faverage low, January

Hot days0days a year at 90 °F or more

Freezing nights121nights a year at 32 °F or less

Growing degree days435base 50 °F — the season’s usable heat

Longest day18 h 06 mindaylight on June 21

Shortest day6 h 31 mindaylight on December 21

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

Precipitation75.6 inper year, rain and melted snow

Snowfall43 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: Kodiak Wwtp, AK (2 mi away); precipitation: Kodiak Wwtp, AK (2 mi away). Daylight is calculated from latitude.

ZIP codes in Kodiak

Alaska planting zones →

Questions about Kodiak

What planting zone is Kodiak, AK?

Kodiak, AK is in USDA hardiness zones 7a to 7b on the 2023 map (7a: 0 to 5 °F; 7b: 5 to 10 °F).

When is the last frost in Kodiak, AK?

The median last spring frost is April 29 and the median first fall frost is October 14 (NOAA 1991–2020 normals, Kodiak Wwtp station).

When can I plant a garden in Kodiak, AK?

Cool-season crops like peas and spinach go in around Mar 18 – Apr 8; tomatoes, peppers, beans and squash after about May 6, once frost risk has passed.

What kind of onions grow in Kodiak, AK?

Long-day onions: the longest day is 18 h 06 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

How much rain and snow does Kodiak, AK get?

About 75.6 inches of precipitation a year and 43 inches of snowfall (NOAA 1991–2020 normals).