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

Planting zone for 98595 — Westport, WA

ZIP code 98595 (Westport, Grays Harbor County) is in USDA zone 9a: the coldest winter night averages 20 to 25 °F. The median last spring frost is March 29 and the first fall frost November 7.

Where ZIP 98595 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 frostMar 29

First frostNov 7

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 Westport, 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 Westport, WA

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostMarch 29median — 50% chance of a later frost

Safe for tender plantsApril 24only 10% chance of frost after

First fall frostNovember 7median — 10% chance by Oct 19

Growing season224 daysfrost-free, median

A hard freeze (28 °F) usually ends around February 22 and returns around December 1.

From the NOAA station Grayland, WA — 7 miles away, elevation 10 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 98595

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Feb 15 – Mar 1

SpinachSow outdoors · Feb 15 – Mar 8

Broccoli, cabbageStart indoors · Jan 18 – Feb 1

Broccoli, cabbageTransplant · Mar 8 – Mar 22

Onion setsPlant outdoors · Mar 1 – Mar 15

PotatoesPlant outdoors · Mar 8 – Mar 22

LettuceSow outdoors · Mar 1 – Mar 15

Carrots, beetsSow outdoors · Mar 8 – Mar 22

TomatoesStart indoors · Feb 1 – Feb 15

TomatoesTransplant · Apr 5 – Apr 19

Peppers, eggplantStart indoors · Jan 18 – Feb 1

Peppers, eggplantTransplant · Apr 12 – Apr 26

BeansSow outdoors · Apr 5 – Apr 19

Sweet cornSow outdoors · Apr 5 – Apr 19

Cucumbers, squashSow outdoors · Apr 5 – Apr 19

Fall lettuce, spinachSow outdoors · Sep 12 – Sep 26

GarlicPlant cloves · Oct 24 – Nov 28

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Mar 29) and first fall frost (Nov 7) 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 98595 came on Feb 2 — 8 days earlier than the 1991–2020 average (Feb 10).

average
Feb 102026
Feb 2

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).

Soil in Westport, WA

The soil mapped at the center of ZIP 98595 is Westport — fine sand, excessively drained.

TextureFine sanddrains and warms fast; dries out and needs more feeding

pH5.3strongly acidic; most vegetables like 6.0–7.0

DrainageExcessively drainednatural drainage class

Organic matter3.5%moderate

Hydrologic groupAwater soaks in fast

Farmland classprime farmlandUSDA classification

Map unit: Westport fine sand, 3 to 10 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 98595; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Westport, WA

Summer high68 °Faverage high, August

Winter low37 °Faverage low, February

Hot days0days a year at 90 °F or more

Freezing nights37nights a year at 32 °F or less

Growing degree days1,304base 50 °F — the season’s usable heat

Longest day15 h 53 mindaylight on June 21

Shortest day8 h 31 mindaylight on December 21

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

Precipitation86.8 inper year, rain and melted snow

Average high and low, by month

Precipitation by month inches

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Grayland, WA (7 mi away); precipitation: Ocean Shores 0.9 Sse, WA (4 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.

985699a

Ocean Shores, WA · 7 mi

Copalis Beach, WA · 14 mi

Ocean Park, WA · 19 mi

985369a

Copalis Crossing, WA · 21 mi

Washington planting zones →

Questions about 98595

What planting zone is ZIP code 98595?

ZIP code 98595 (Westport, 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 Westport, WA?

The median last spring frost (32 °F) near 98595 is March 29; after April 24 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Grayland station.

When is the first frost in Westport, WA?

The median first fall frost near 98595 is November 7, giving a median frost-free growing season of 224 days.

When should I plant tomatoes in 98595?

Start tomato seeds indoors around Feb 1 – Feb 15 and set transplants outside around Apr 5 – Apr 19, one to three weeks after the median last frost.

How much rain and snow does 98595 get?

About 86.8 inches of precipitation a year (NOAA 1991–2020 normals, Ocean Shores 0.9 Sse station).

How hot do summers get in Westport, WA?

The average high peaks at 68 °F in August, with about 0 days a year at 90 °F or more.

What kind of soil does 98595 have?

The USDA soil survey maps Westport at the center of ZIP 98595: fine sand, excessively drained, pH about 5.3 (strongly acidic).

Did spring come early in Westport, WA in 2026?

Spring leaf-out near 98595 came on Feb 2 in 2026, 8 days earlier than the 1991–2020 average (Feb 10), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Westport, WA?

Long-day onions: the longest day near 98595 is 15 h 53 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).