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

Planting zone for 99661 — Sand Point, AK

ZIP code 99661 (Sand Point, Aleutians East County) is in USDA zone 7b: the coldest winter night averages 5 to 10 °F. The median last spring frost is May 11 and the first fall frost October 18.

Where ZIP 99661 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 11
First frostOct 18
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 Sand Point, 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 Sand Point, AK

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMay 11median — 50% chance of a later frost
Safe for tender plantsMay 25only 10% chance of frost after
First fall frostOctober 18median — 10% chance by Oct 4
Growing season160 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 26 and returns around November 1.

From the NOAA station Sand Point 1 Ene, AK — 11 miles away, elevation 240 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 99661

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 30 – Apr 13
SpinachSow outdoors · Mar 30 – Apr 20
Broccoli, cabbageStart indoors · Mar 2 – Mar 16
Broccoli, cabbageTransplant · Apr 20 – May 4
Onion setsPlant outdoors · Apr 13 – Apr 27
PotatoesPlant outdoors · Apr 20 – May 4
LettuceSow outdoors · Apr 13 – Apr 27
Carrots, beetsSow outdoors · Apr 20 – May 4
TomatoesStart indoors · Mar 16 – Mar 30
TomatoesTransplant · May 18 – Jun 1
Peppers, eggplantStart indoors · Mar 2 – Mar 16
Peppers, eggplantTransplant · May 25 – Jun 8
BeansSow outdoors · May 18 – Jun 1
Sweet cornSow outdoors · May 18 – Jun 1
Cucumbers, squashSow outdoors · May 18 – Jun 1
Fall lettuce, spinachSow outdoors · Aug 23 – Sep 6
GarlicPlant cloves · Oct 4 – Nov 8
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 11) and first fall frost (Oct 18) 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 Sand Point, AK.

Soil in Sand Point, AK

The soil mapped at the center of ZIP 99661 is E25-Maritime tall scrub-ashy till slopes — slightly decomposed plant material, well drained.

TextureSlightly 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: Southern Alaska Peninsula Mountains-Maritime Upland-Rounded Mountains.

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 99661; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Sand Point, AK

Summer high57 °Faverage high, August
Winter low27 °Faverage low, January
Hot days0days a year at 90 °F or more
Freezing nights111nights a year at 32 °F or less
Growing degree days196base 50 °F — the season’s usable heat
Longest day17 h 26 mindaylight on June 21
Shortest day7 h 06 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation48.9 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 27 °F 35°27° JanFebruary: average high 35 °F, low 28 °F 35°28° FebMarch: average high 35 °F, low 27 °F 35°27° MarApril: average high 40 °F, low 31 °F 40°31° AprMay: average high 46 °F, low 36 °F 46°36° MayJune: average high 52 °F, low 43 °F 52°43° JunJuly: average high 56 °F, low 47 °F 56°47° JulAugust: average high 57 °F, low 48 °F 57°48° AugSeptember: average high 53 °F, low 44 °F 53°44° SepOctober: average high 46 °F, low 37 °F 46°37° OctNovember: average high 40 °F, low 33 °F 40°33° NovDecember: average high 37 °F, low 29 °F 37°29° Dec

Precipitation by month inches

0″2″4″6″January: 3.99 in precipitation 4.0 JanFebruary: 4.43 in precipitation 4.4 FebMarch: 2.41 in precipitation 2.4 MarApril: 2.64 in precipitation 2.6 AprMay: 4.01 in precipitation 4.0 MayJune: 3.10 in precipitation 3.1 JunJuly: 2.93 in precipitation 2.9 JulAugust: 3.89 in precipitation 3.9 AugSeptember: 4.95 in precipitation 5.0 SepOctober: 4.97 in precipitation 5.0 OctNovember: 5.09 in precipitation 5.1 NovDecember: 6.51 in precipitation 6.5 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Sand Point 1 Ene, AK (11 mi away); precipitation: Sand Point 1 Ene, AK (11 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

2 of the 2 nearest ZIP codes are in a different zone — elevation and distance from water change winter lows quickly.

996956b
Anchorage, AK · 66 mi
996486b
Perryville, AK · 76 mi

Alaska planting zones →

Questions about 99661

What planting zone is ZIP code 99661?

ZIP code 99661 (Sand Point, 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 Sand Point, AK?

The median last spring frost (32 °F) near 99661 is May 11; after May 25 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Sand Point 1 Ene station.

When is the first frost in Sand Point, AK?

The median first fall frost near 99661 is October 18, giving a median frost-free growing season of 160 days.

When should I plant tomatoes in 99661?

Start tomato seeds indoors around Mar 16 – Mar 30 and set transplants outside around May 18 – Jun 1, one to three weeks after the median last frost.

How much rain and snow does 99661 get?

About 48.9 inches of precipitation a year (NOAA 1991–2020 normals, Sand Point 1 Ene station).

How hot do summers get in Sand Point, AK?

The average high peaks at 57 °F in August, with about 0 days a year at 90 °F or more.

What kind of soil does 99661 have?

The USDA soil survey maps E25-Maritime tall scrub-ashy till slopes at the center of ZIP 99661: slightly decomposed plant material, well drained, pH about 4.4 (strongly acidic).

What kind of onions grow in Sand Point, AK?

Long-day onions: the longest day near 99661 is 17 h 26 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).