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

Planting zone for 97376 — Seal Rock, OR

ZIP code 97376 (Seal Rock, Lincoln County) is in USDA zone 9a: the coldest winter night averages 20 to 25 °F. The median last spring frost is February 19 and the first fall frost December 16.

Where ZIP 97376 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.

Zone9a20 to 25 °F
Coldest night−6.7 to −3.9 °C
Last frostFeb 19
First frostDec 16
2012 zone9a

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 9a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Seal Rock, OR…

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 Seal Rock, OR

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostFebruary 19median — 50% chance of a later frost
Safe for tender plantsMarch 23only 10% chance of frost after
First fall frostDecember 16median — 10% chance by Nov 14
Growing season306 daysfrost-free, median

A hard freeze (28 °F) usually ends around January 20 and returns around December 30.

From the NOAA station Newport 1 Se, OR — 9 miles away, elevation 7 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 97376

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Jan 8 – Jan 22
SpinachSow outdoors · Jan 8 – Jan 29
Broccoli, cabbageStart indoors · Dec 11 – Dec 25
Broccoli, cabbageTransplant · Jan 29 – Feb 12
Onion setsPlant outdoors · Jan 22 – Feb 5
PotatoesPlant outdoors · Jan 29 – Feb 12
LettuceSow outdoors · Jan 22 – Feb 5
Carrots, beetsSow outdoors · Jan 29 – Feb 12
TomatoesStart indoors · Dec 25 – Jan 8
TomatoesTransplant · Feb 26 – Mar 12
Peppers, eggplantStart indoors · Dec 11 – Dec 25
Peppers, eggplantTransplant · Mar 5 – Mar 19
BeansSow outdoors · Feb 26 – Mar 12
Sweet cornSow outdoors · Feb 26 – Mar 12
Cucumbers, squashSow outdoors · Feb 26 – Mar 12
Fall lettuce, spinachSow outdoors · Oct 21 – Nov 4
GarlicPlant cloves · Dec 2 – Jan 6
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Feb 19) and first fall frost (Dec 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 97376 came on Feb 3 — 9 days earlier than the 1991–2020 average (Feb 12).

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 9a in Oregon

666 plants native to the lower 48 states, recorded in Oregon, and rated by the USDA to survive 20 °F or colder — the bottom of zone 9a. Each links to its USDA PLANTS profile.

Trees 44

Alaska cedar75 ft · blooms mid spring · low shade tolerance · to −22 °Fbalsam poplar80 ft · blooms late spring · high shade tolerance · to −79 °Fbigleaf maple60 ft · blooms mid spring · medium shade tolerance · to −14 °FBishop pine90 ft · blooms mid spring · low shade tolerance · to 17 °Fblack locust60 ft · blooms spring · high shade tolerance · to −37 °Fboxelder60 ft · blooms early spring · low shade tolerance · to −46 °F

Shrubs 133

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 °Fantelope bitterbrush6 ft · blooms early spring · medium shade tolerance · to −36 °Fbeaked hazelnut15 ft · blooms early spring · low shade tolerance · to −47 °Fbig sagebrush4 ft · blooms mid summer · high shade tolerance · to −43 °F

Wildflowers & perennials 305

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 eelgrass1 ft · blooms mid summer · high shade tolerance · to −33 °F

Grasses 169

Alaska brome5 ft · blooms late spring · low shade tolerance · to −18 °FAlaska oniongrass3 ft · blooms mid spring · low shade tolerance · to −33 °Falkali cordgrass3 ft · blooms late summer · high shade tolerance · to −38 °Falkali sacaton3 ft · blooms mid summer · high shade tolerance · to −38 °Falpine timothy1.4 ft · blooms late spring · medium shade tolerance · to −43 °FAmerican beachgrass2.5 ft · blooms spring · high shade tolerance · to −28 °F

Vines 2

riverbank grape45 ft · blooms late spring · medium shade tolerance · to −33 °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 Seal Rock, OR.

Soil in Seal Rock, OR

The soil mapped at the center of ZIP 97376 is Tolovana — slightly decomposed plant material, well drained.

TextureSlightly decomposed plant materialtop layer
pH4.5strongly acidic; 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: Tolovana-Reedsport complex, 35 to 60 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 97376; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Seal Rock, OR

Summer high66 °Faverage high, September
Winter low38 °Faverage low, February
Hot days0days a year at 90 °F or more
Freezing nights11nights a year at 32 °F or less
Growing degree days1,184base 50 °F — the season’s usable heat
Longest day15 h 33 mindaylight on June 21
Shortest day8 h 49 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation72.3 inper year, rain and melted snow

Average high and low, by month

30°40°50°60°70°80°32 °FJanuary: average high 51 °F, low 39 °F 51°39° JanFebruary: average high 52 °F, low 38 °F 52°38° FebMarch: average high 54 °F, low 40 °F 54°40° MarApril: average high 55 °F, low 42 °F 55°42° AprMay: average high 58 °F, low 46 °F 58°46° MayJune: average high 61 °F, low 50 °F 61°50° JunJuly: average high 64 °F, low 51 °F 64°51° JulAugust: average high 65 °F, low 51 °F 65°51° AugSeptember: average high 66 °F, low 49 °F 66°49° SepOctober: average high 61 °F, low 47 °F 61°47° OctNovember: average high 55 °F, low 42 °F 55°42° NovDecember: average high 50 °F, low 39 °F 50°39° Dec

Precipitation by month inches

0″2″4″6″8″10″12″January: 10.23 in precipitation 10.2 JanFebruary: 8.31 in precipitation 8.3 FebMarch: 8.92 in precipitation 8.9 MarApril: 5.48 in precipitation 5.5 AprMay: 3.65 in precipitation 3.6 MayJune: 2.77 in precipitation 2.8 JunJuly: 0.55 in precipitation 0.6 JulAugust: 1.01 in precipitation 1.0 AugSeptember: 2.32 in precipitation 2.3 SepOctober: 5.74 in precipitation 5.7 OctNovember: 10.55 in precipitation 10.6 NovDecember: 12.82 in precipitation 12.8 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Newport 1 Se, OR (9 mi away); precipitation: Newport 1 Se, OR (9 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

973669b
South Beach, OR · 7 mi
973949a
Waldport, OR · 7 mi
973919a
Toledo, OR · 7 mi
973909a
Tidewater, OR · 11 mi
973439a
Eddyville, OR · 12 mi
973659b
Newport, OR · 12 mi
974989a
Yachats, OR · 16 mi
973268b
Blodgett, OR · 18 mi

Oregon planting zones →

Questions about 97376

What planting zone is ZIP code 97376?

ZIP code 97376 (Seal Rock, OR) is in USDA hardiness zone 9a on the 2023 map: the coldest night of an average winter reaches 20 to 25 °F (−6.7 to −3.9 °C).

When is the last frost in Seal Rock, OR?

The median last spring frost (32 °F) near 97376 is February 19; after March 23 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Newport 1 Se station.

When is the first frost in Seal Rock, OR?

The median first fall frost near 97376 is December 16, giving a median frost-free growing season of 306 days.

When should I plant tomatoes in 97376?

Start tomato seeds indoors around Dec 25 – Jan 8 and set transplants outside around Feb 26 – Mar 12, one to three weeks after the median last frost.

How much rain and snow does 97376 get?

About 72.3 inches of precipitation a year (NOAA 1991–2020 normals, Newport 1 Se station).

How hot do summers get in Seal Rock, OR?

The average high peaks at 66 °F in September, with about 0 days a year at 90 °F or more.

What kind of soil does 97376 have?

The USDA soil survey maps Tolovana at the center of ZIP 97376: slightly decomposed plant material, well drained, pH about 4.5 (strongly acidic).

Did spring come early in Seal Rock, OR in 2026?

Spring leaf-out near 97376 came on Feb 3 in 2026, 9 days earlier than the 1991–2020 average (Feb 12), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Seal Rock, OR?

Long-day onions: the longest day near 97376 is 15 h 33 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).