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

Planting zone for 99774 — Stevens Village, AK

ZIP code 99774 (Stevens Village, Yukon-Koyukuk (CA) County) is in USDA zone 1a: the coldest winter night averages −60 to −55 °F. The median last spring frost is May 28 and the first fall frost August 26.

Where ZIP 99774 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.

Zone1a−60 to −55 °F
Coldest night−51.1 to −48.3 °C
Last frostMay 28
First frostAug 26
2012 zone1b

Was 1b on the 2012 map — half a zone colder now. The zone is the one at the center of the ZIP code; hilly ZIPs can span two zones. What zone 1a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Stevens Village, 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 Stevens Village, AK

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMay 28median — 50% chance of a later frost
Safe for tender plantsJune 19only 10% chance of frost after
First fall frostAugust 26median — 10% chance by Aug 9
Growing season87 daysfrost-free, median

A hard freeze (28 °F) usually ends around May 14 and returns around September 6.

From the NOAA station Mile 42 Steese, AK — 78 miles away, elevation 961 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 99774

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Apr 16 – Apr 30
SpinachSow outdoors · Apr 16 – May 7
Broccoli, cabbageStart indoors · Mar 19 – Apr 2
Broccoli, cabbageTransplant · May 7 – May 21
Onion setsPlant outdoors · Apr 30 – May 14
PotatoesPlant outdoors · May 7 – May 21
LettuceSow outdoors · Apr 30 – May 14
Carrots, beetsSow outdoors · May 7 – May 21
TomatoesStart indoors · Apr 2 – Apr 16
TomatoesTransplant · Jun 4 – Jun 18
Peppers, eggplantStart indoors · Mar 19 – Apr 2
Peppers, eggplantTransplant · Jun 11 – Jun 25
BeansSow outdoors · Jun 4 – Jun 18
Sweet cornSow outdoors · Jun 4 – Jun 18
Cucumbers, squashSow outdoors · Jun 4 – Jun 18
Fall lettuce, spinachSow outdoors · Jul 1 – Jul 15
GarlicPlant cloves · Aug 12 – Sep 16
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 28) and first fall frost (Aug 26) 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 1a in Alaska

37 plants native to Alaska, recorded in Alaska, and rated by the USDA to survive −60 °F or colder — the bottom of zone 1a. Each links to its USDA PLANTS profile.

Trees 7

balsam 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 °Fpaper birch70 ft · blooms mid spring · high shade tolerance · to −62 °Fquaking aspen65 ft · blooms mid spring · high shade tolerance · to −70 °Ftamarack80 ft · blooms mid spring · high shade tolerance · to −79 °F

Shrubs 15

alpine bearberry0.5 ft · blooms early spring · medium shade tolerance · to −62 °Fhalberd willow3 ft · blooms early summer · to −62 °FLapland rosebay3 ft · blooms late spring · low shade tolerance · to −62 °Flingonberry0.5 ft · blooms summer · high shade tolerance · to −62 °Fmarsh Labrador tea0.5 ft · blooms summer · to −62 °Fnetleaf willow0.2 ft · blooms early summer · to −62 °F

Wildflowers & perennials 11

alpine sweetvetch2 ft · blooms early summer · high shade tolerance · to −62 °Farctic dock1 ft · blooms summer · high shade tolerance · to −62 °Farctic lupine2 ft · blooms spring · medium shade tolerance · to −62 °Farctic raspberry1 ft · blooms summer · high shade tolerance · to −62 °Feightpetal mountain-avens0.3 ft · blooms late spring · medium shade tolerance · to −62 °Fhigh northern buttercup1 ft · blooms summer · high shade tolerance · to −62 °F

Grasses 2

arctic bluegrass2 ft · high shade tolerance · to −62 °Flivid sedge1 ft · blooms early summer · high shade tolerance · to −62 °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 Stevens Village, AK.

Soil in Stevens Village, AK

The soil mapped at the center of ZIP 99774 is Kingslough — moderately decomposed plant material, well drained.

TextureModerately decomposed plant materialtop layer
pH7.5slightly alkaline; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter75%high
Hydrologic groupCwater soaks in slowly
Farmland classNot prime farmlandUSDA classification

Map unit: Kingslough-Twin association, 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 99774; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Stevens Village, AK

Summer high73 °Faverage high, June
Winter low−21 °Faverage low, January
Hot days0days a year at 90 °F or more
Freezing nights252nights a year at 32 °F or less
Growing degree days657base 50 °F — the season’s usable heat
Longest day24 h 00 mindaylight on June 21
Shortest day2 h 45 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)

Average high and low, by month

−30°−20°−10°0°10°20°30°40°50°60°70°80°32 °FJanuary: average high 2 °F, low -21 °F 2°−21° JanFebruary: average high 12 °F, low -16 °F 12°−16° FebMarch: average high 24 °F, low -11 °F 24°−11° MarApril: average high 43 °F, low 13 °F 43°13° AprMay: average high 61 °F, low 30 °F 61°30° MayJune: average high 73 °F, low 40 °F 73°40° JunJuly: average high 72 °F, low 46 °F 72°46° JulAugust: average high 66 °F, low 41 °F 66°41° AugSeptember: average high 54 °F, low 29 °F 54°29° SepOctober: average high 33 °F, low 14 °F 33°14° OctNovember: average high 11 °F, low -10 °F 11°−10° NovDecember: average high 3 °F, low -15 °F 3°−15° Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Manley Hot Springs 15ne, AK (70 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

997671b
Rampart, AK · 47 mi
997903b
Fairbanks, AK · 48 mi
997582a
Minto, AK · 61 mi
997082a
Fairbanks, AK · 82 mi
997093b
Fairbanks, AK · 84 mi
997253b
Ester, AK · 86 mi
997752b
Fairbanks, AK · 88 mi
997102b
Fairbanks, AK · 91 mi

Alaska planting zones →

Questions about 99774

What planting zone is ZIP code 99774?

ZIP code 99774 (Stevens Village, AK) is in USDA hardiness zone 1a on the 2023 map: the coldest night of an average winter reaches −60 to −55 °F (−51.1 to −48.3 °C).

When is the last frost in Stevens Village, AK?

The median last spring frost (32 °F) near 99774 is May 28; after June 19 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Mile 42 Steese station.

When is the first frost in Stevens Village, AK?

The median first fall frost near 99774 is August 26, giving a median frost-free growing season of 87 days.

When should I plant tomatoes in 99774?

Start tomato seeds indoors around Apr 2 – Apr 16 and set transplants outside around Jun 4 – Jun 18, one to three weeks after the median last frost.

How hot do summers get in Stevens Village, AK?

The average high peaks at 73 °F in June, with about 0 days a year at 90 °F or more.

What kind of soil does 99774 have?

The USDA soil survey maps Kingslough at the center of ZIP 99774: moderately decomposed plant material, well drained, pH about 7.5 (slightly alkaline).

What kind of onions grow in Stevens Village, AK?

Long-day onions: the longest day near 99774 is 24 h 00 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 99774 change?

Yes. The 2012 USDA map put 99774 in zone 1b; the 2023 map puts it in zone 1a. The newer map uses 1991–2020 data and more weather stations.