Data: 2023 USDA zones (PRISM/OSU) · NOAA 1991–2020 normals · updated Oct 29, 2026

Planting zone for 98381 — Sekiu, WA

ZIP code 98381 (Sekiu, Clallam County) is in USDA zone 9a: the coldest winter night averages 20 to 25 °F. The median last spring frost is April 26 and the first fall frost October 25.

Where ZIP 98381 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 frostApr 26

First frostOct 25

2012 zone8b

Was 8b on the 2012 map — half a zone warmer now. 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 Sekiu, WA…

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 Sekiu, WA

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostApril 26median — 50% chance of a later frost

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

First fall frostOctober 25median — 10% chance by Oct 6

Growing season182 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 27 and returns around November 15.

From the NOAA station Forks 1 E, WA — 24 miles away, elevation 351 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 98381

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Mar 15 – Mar 29

SpinachSow outdoors · Mar 15 – Apr 5

Broccoli, cabbageStart indoors · Feb 15 – Mar 1

Broccoli, cabbageTransplant · Apr 5 – Apr 19

Onion setsPlant outdoors · Mar 29 – Apr 12

PotatoesPlant outdoors · Apr 5 – Apr 19

LettuceSow outdoors · Mar 29 – Apr 12

Carrots, beetsSow outdoors · Apr 5 – Apr 19

TomatoesStart indoors · Mar 1 – Mar 15

TomatoesTransplant · May 3 – May 17

Peppers, eggplantStart indoors · Feb 15 – Mar 1

Peppers, eggplantTransplant · May 10 – May 24

BeansSow outdoors · May 3 – May 17

Sweet cornSow outdoors · May 3 – May 17

Cucumbers, squashSow outdoors · May 3 – May 17

Fall lettuce, spinachSow outdoors · Aug 30 – Sep 13

GarlicPlant cloves · Oct 11 – Nov 15

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 26) and first fall frost (Oct 25) 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 98381 came on Feb 17 — 10 days earlier than the 1991–2020 average (Feb 27).

average
Feb 272026
Feb 17

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 Washington

617 plants native to the lower 48 states, recorded in Washington, and rated by the USDA to survive 20 °F or colder — the bottom of zone 9a. 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 Sekiu, WA.

Soil in Sekiu, WA

The soil mapped at the center of ZIP 98381 is Palix — medial loam, well drained.

TextureMedial loama good balance for most vegetables

pH4.3strongly acidic; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter12.5%high

Hydrologic groupBwater soaks in moderately

Farmland classNot prime farmlandUSDA classification

Map unit: Palix loam, 30 to 65 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 98381; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Sekiu, WA

Summer high74 °Faverage high, August

Winter low34 °Faverage low, February

Hot days4days a year at 90 °F or more

Freezing nights60nights a year at 32 °F or less

Growing degree days1,507base 50 °F — the season’s usable heat

Longest day16 h 05 mindaylight on June 21

Shortest day8 h 20 mindaylight on December 21

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

Precipitation119.9 inper year, rain and melted snow

Snowfall8 inper year; 5 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: Forks 1 E, WA (24 mi away); precipitation: Forks 1 E, WA (24 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

983579a

Neah Bay, WA · 9 mi

983269a

Clallam Bay, WA · 9 mi

Port Angeles, WA · 35 mi

983318b

Forks, WA · 40 mi

983628b

Port Angeles, WA · 55 mi

Washington planting zones →

Questions about 98381

What planting zone is ZIP code 98381?

ZIP code 98381 (Sekiu, WA) 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 Sekiu, WA?

The median last spring frost (32 °F) near 98381 is April 26; after May 10 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Forks 1 E station.

When is the first frost in Sekiu, WA?

The median first fall frost near 98381 is October 25, giving a median frost-free growing season of 182 days.

When should I plant tomatoes in 98381?

Start tomato seeds indoors around Mar 1 – Mar 15 and set transplants outside around May 3 – May 17, one to three weeks after the median last frost.

How much rain and snow does 98381 get?

About 119.9 inches of precipitation a year and 8 inches of snowfall (NOAA 1991–2020 normals, Forks 1 E station).

How hot do summers get in Sekiu, WA?

The average high peaks at 74 °F in August, with about 4 days a year at 90 °F or more.

What kind of soil does 98381 have?

The USDA soil survey maps Palix at the center of ZIP 98381: medial loam, well drained, pH about 4.3 (strongly acidic).

Did spring come early in Sekiu, WA in 2026?

Spring leaf-out near 98381 came on Feb 17 in 2026, 10 days earlier than the 1991–2020 average (Feb 27), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Sekiu, WA?

Long-day onions: the longest day near 98381 is 16 h 05 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 98381 change?

Yes. The 2012 USDA map put 98381 in zone 8b; the 2023 map puts it in zone 9a. The newer map uses 1991–2020 data and more weather stations.