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

Planting zone for 99644 — Ouzinkie, AK

ZIP code 99644 (Ouzinkie, Kodiak Island County) is in USDA zone 7b: the coldest winter night averages 5 to 10 °F. The median last spring frost is May 9 and the first fall frost October 4.

Where ZIP 99644 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 frostMay 9
First frostOct 4
2012 zone7b

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 7b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Ouzinkie, 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 Ouzinkie, AK

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMay 9median — 50% chance of a later frost
Safe for tender plantsMay 23only 10% chance of frost after
First fall frostOctober 4median — 10% chance by Sep 22
Growing season148 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 18 and returns around October 19.

From the NOAA station Ouzinkie, AK — 4 miles away, elevation 39 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 99644

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 28 – Apr 11
SpinachSow outdoors · Mar 28 – Apr 18
Broccoli, cabbageStart indoors · Feb 28 – Mar 14
Broccoli, cabbageTransplant · Apr 18 – May 2
Onion setsPlant outdoors · Apr 11 – Apr 25
PotatoesPlant outdoors · Apr 18 – May 2
LettuceSow outdoors · Apr 11 – Apr 25
Carrots, beetsSow outdoors · Apr 18 – May 2
TomatoesStart indoors · Mar 14 – Mar 28
TomatoesTransplant · May 16 – May 30
Peppers, eggplantStart indoors · Feb 28 – Mar 14
Peppers, eggplantTransplant · May 23 – Jun 6
BeansSow outdoors · May 16 – May 30
Sweet cornSow outdoors · May 16 – May 30
Cucumbers, squashSow outdoors · May 16 – May 30
Fall lettuce, spinachSow outdoors · Aug 9 – Aug 23
GarlicPlant cloves · Sep 20 – Oct 25
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 9) and first fall frost (Oct 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.

Native plants for zone 7b in Alaska

289 plants native to Alaska, recorded in Alaska, and rated by the USDA to survive 5 °F or colder — the bottom of zone 7b. Each links to its USDA PLANTS profile.

Trees 16

Alaska cedar75 ft · blooms mid spring · low shade tolerance · to −22 °Fbalsam poplar80 ft · blooms late spring · high shade tolerance · to −79 °Fblack spruce65 ft · blooms late spring · low shade tolerance · to −79 °Flodgepole pine99 ft · blooms mid summer · high shade tolerance · to −70 °Fmountain hemlock125 ft · blooms early summer · low shade tolerance · to −18 °FPacific silver fir165 ft · blooms late spring · low shade tolerance · to −28 °F

Shrubs 50

alpine bearberry0.5 ft · blooms early spring · medium shade tolerance · to −62 °Falpine laurel1 ft · blooms late spring · low shade tolerance · to −28 °FBarclay's willow15 ft · high shade tolerance · to −43 °Fblack crowberry1 ft · blooms mid summer · high shade tolerance · to −43 °Fblack hawthorn15 ft · blooms mid spring · medium shade tolerance · to −47 °Fbog blueberry2 ft · blooms early summer · medium shade tolerance · to −38 °F

Wildflowers & perennials 125

alkali buttercup1 ft · blooms late spring · low shade tolerance · to −38 °Falpine aster0.3 ft · blooms early summer · medium shade tolerance · to −28 °Falpine bistort1 ft · blooms mid spring · high shade tolerance · to −38 °Falpine mountainsorrel1 ft · blooms mid summer · medium shade tolerance · to −43 °Falpine sweetvetch2 ft · blooms early summer · high shade tolerance · to −62 °FAmerican alpine speedwell1 ft · blooms summer · medium shade tolerance · to −28 °F

Grasses 89

Alaska brome5 ft · blooms late spring · low shade tolerance · to −18 °FAlaska oniongrass3 ft · blooms mid spring · low shade tolerance · to −33 °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 °Farctic bluegrass2 ft · high shade tolerance · to −62 °Fawlfruit sedge4 ft · blooms mid spring · low 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 Ouzinkie, AK.

Soil in Ouzinkie, AK

The soil mapped at the center of ZIP 99644 is Kazakof — moderately decomposed plant material, well drained.

TextureModerately decomposed plant materialtop layer
pH4.4strongly acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter75%high
Hydrologic groupBwater soaks in moderately
Farmland classNot prime farmlandUSDA classification

Map unit: Kazakof-Akalura complex, 10 to 50 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 99644; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Ouzinkie, AK

Summer high61 °Faverage high, August
Winter low26 °Faverage low, January
Hot days0days a year at 90 °F or more
Freezing nights148nights a year at 32 °F or less
Growing degree days339base 50 °F — the season’s usable heat
Longest day18 h 09 mindaylight on June 21
Shortest day6 h 29 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation102.5 inper year, rain and melted snow

Average high and low, by month

20°30°40°50°60°70°32 °FJanuary: average high 35 °F, low 26 °F 35°26° JanFebruary: average high 35 °F, low 27 °F 35°27° FebMarch: average high 37 °F, low 26 °F 37°26° MarApril: average high 43 °F, low 32 °F 43°32° AprMay: average high 50 °F, low 38 °F 50°38° MayJune: average high 55 °F, low 44 °F 55°44° JunJuly: average high 60 °F, low 48 °F 60°48° JulAugust: average high 61 °F, low 48 °F 61°48° AugSeptember: average high 55 °F, low 43 °F 55°43° SepOctober: average high 46 °F, low 35 °F 46°35° OctNovember: average high 39 °F, low 30 °F 39°30° NovDecember: average high 36 °F, low 26 °F 36°26° Dec

Precipitation by month inches

0″2″4″6″8″10″12″January: 11.17 in precipitation 11.2 JanFebruary: 8.31 in precipitation 8.3 FebMarch: 5.46 in precipitation 5.5 MarApril: 7.83 in precipitation 7.8 AprMay: 7.81 in precipitation 7.8 MayJune: 7.19 in precipitation 7.2 JunJuly: 6.28 in precipitation 6.3 JulAugust: 6.91 in precipitation 6.9 AugSeptember: 9.69 in precipitation 9.7 SepOctober: 11.49 in precipitation 11.5 OctNovember: 9.67 in precipitation 9.7 NovDecember: 10.70 in precipitation 10.7 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Ouzinkie, AK (4 mi away); precipitation: Monashka Creek Dam, AK (6 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

996197b
Kodiak, AK · 8 mi
996977b
Kodiak, AK · 8 mi
995507a
Port Lions, AK · 18 mi
996157a
Kodiak, AK · 40 mi
996437b
Old Harbor, AK · 59 mi
996247b
Larsen Bay, AK · 62 mi
996636b
Seldovia, AK · 107 mi

Alaska planting zones →

Questions about 99644

What planting zone is ZIP code 99644?

ZIP code 99644 (Ouzinkie, AK) 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 Ouzinkie, AK?

The median last spring frost (32 °F) near 99644 is May 9; after May 23 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Ouzinkie station.

When is the first frost in Ouzinkie, AK?

The median first fall frost near 99644 is October 4, giving a median frost-free growing season of 148 days.

When should I plant tomatoes in 99644?

Start tomato seeds indoors around Mar 14 – Mar 28 and set transplants outside around May 16 – May 30, one to three weeks after the median last frost.

How much rain and snow does 99644 get?

About 102.5 inches of precipitation a year (NOAA 1991–2020 normals, Monashka Creek Dam station).

How hot do summers get in Ouzinkie, AK?

The average high peaks at 61 °F in August, with about 0 days a year at 90 °F or more.

What kind of soil does 99644 have?

The USDA soil survey maps Kazakof at the center of ZIP 99644: moderately decomposed plant material, well drained, pH about 4.4 (strongly acidic).

What kind of onions grow in Ouzinkie, AK?

Long-day onions: the longest day near 99644 is 18 h 09 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).