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

Planting zone for 98641 — Oysterville, WA

ZIP code 98641 (Oysterville, Pacific County) is in USDA zone 9a: the coldest winter night averages 20 to 25 °F. The median last spring frost is April 6 and the first fall frost October 26.

Where ZIP 98641 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 6
First frostOct 26
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 Oysterville, 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 Oysterville, WA

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 6median — 50% chance of a later frost
Safe for tender plantsApril 28only 10% chance of frost after
First fall frostOctober 26median — 10% chance by Oct 4
Growing season200 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 6 and returns around November 13.

From the NOAA station Long Beach Exp Stn, WA — 14 miles away, elevation 26 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 98641

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Feb 23 – Mar 9
SpinachSow outdoors · Feb 23 – Mar 16
Broccoli, cabbageStart indoors · Jan 26 – Feb 9
Broccoli, cabbageTransplant · Mar 16 – Mar 30
Onion setsPlant outdoors · Mar 9 – Mar 23
PotatoesPlant outdoors · Mar 16 – Mar 30
LettuceSow outdoors · Mar 9 – Mar 23
Carrots, beetsSow outdoors · Mar 16 – Mar 30
TomatoesStart indoors · Feb 9 – Feb 23
TomatoesTransplant · Apr 13 – Apr 27
Peppers, eggplantStart indoors · Jan 26 – Feb 9
Peppers, eggplantTransplant · Apr 20 – May 4
BeansSow outdoors · Apr 13 – Apr 27
Sweet cornSow outdoors · Apr 13 – Apr 27
Cucumbers, squashSow outdoors · Apr 13 – Apr 27
Fall lettuce, spinachSow outdoors · Aug 31 – Sep 14
GarlicPlant cloves · Oct 12 – Nov 16
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 6) and first fall frost (Oct 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.

When spring arrived in 2026

In 2026, spring leaf-out near 98641 came on Feb 2 — 8 days earlier than the 1991–2020 average (Feb 10).

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 Oysterville, WA

The soil mapped at the center of ZIP 98641 is Netarts — fine sand, well drained.

TextureFine sanddrains and warms fast; dries out and needs more feeding
pH4.6strongly acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter4%moderate
Hydrologic groupAwater soaks in fast
Farmland classprime farmlandUSDA classification

Map unit: Netarts fine sand, 3 to 12 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 98641; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Oysterville, WA

Summer high67 °Faverage high, August
Winter low35 °Faverage low, February
Hot days0days a year at 90 °F or more
Freezing nights41nights a year at 32 °F or less
Growing degree days1,140base 50 °F — the season’s usable heat
Longest day15 h 50 mindaylight on June 21
Shortest day8 h 34 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation78.5 inper year, rain and melted snow

Average high and low, by month

20°30°40°50°60°70°80°32 °FJanuary: average high 49 °F, low 36 °F 49°36° JanFebruary: average high 50 °F, low 35 °F 50°35° FebMarch: average high 52 °F, low 37 °F 52°37° MarApril: average high 55 °F, low 40 °F 55°40° AprMay: average high 59 °F, low 45 °F 59°45° MayJune: average high 62 °F, low 49 °F 62°49° JunJuly: average high 65 °F, low 52 °F 65°52° JulAugust: average high 67 °F, low 52 °F 67°52° AugSeptember: average high 66 °F, low 48 °F 66°48° SepOctober: average high 60 °F, low 42 °F 60°42° OctNovember: average high 53 °F, low 38 °F 53°38° NovDecember: average high 48 °F, low 36 °F 48°36° Dec

Precipitation by month inches

0″2″4″6″8″10″12″January: 10.31 in precipitation 10.3 JanFebruary: 7.19 in precipitation 7.2 FebMarch: 10.14 in precipitation 10.1 MarApril: 6.01 in precipitation 6.0 AprMay: 4.04 in precipitation 4.0 MayJune: 2.63 in precipitation 2.6 JunJuly: 1.39 in precipitation 1.4 JulAugust: 1.70 in precipitation 1.7 AugSeptember: 2.80 in precipitation 2.8 SepOctober: 7.79 in precipitation 7.8 OctNovember: 12.38 in precipitation 12.4 NovDecember: 12.13 in precipitation 12.1 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Long Beach Exp Stn, WA (14 mi away); precipitation: Ocean Park 2.2 N, WA (3 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

986409a
Ocean Park, WA · 4 mi
986379a
Nahcotta, WA · 5 mi
985279a
Bay Center, WA · 6 mi
985869a
South Bend, WA · 10 mi
985909b
Tokeland, WA · 10 mi
986319a
Long Beach, WA · 13 mi
985479a
Grayland, WA · 15 mi
986249a
Ilwaco, WA · 17 mi

Washington planting zones →

Questions about 98641

What planting zone is ZIP code 98641?

ZIP code 98641 (Oysterville, 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 Oysterville, WA?

The median last spring frost (32 °F) near 98641 is April 6; after April 28 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Long Beach Exp Stn station.

When is the first frost in Oysterville, WA?

The median first fall frost near 98641 is October 26, giving a median frost-free growing season of 200 days.

When should I plant tomatoes in 98641?

Start tomato seeds indoors around Feb 9 – Feb 23 and set transplants outside around Apr 13 – Apr 27, one to three weeks after the median last frost.

How much rain and snow does 98641 get?

About 78.5 inches of precipitation a year (NOAA 1991–2020 normals, Ocean Park 2.2 N station).

How hot do summers get in Oysterville, WA?

The average high peaks at 67 °F in August, with about 0 days a year at 90 °F or more.

What kind of soil does 98641 have?

The USDA soil survey maps Netarts at the center of ZIP 98641: fine sand, well drained, pH about 4.6 (strongly acidic).

Did spring come early in Oysterville, WA in 2026?

Spring leaf-out near 98641 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 Oysterville, WA?

Long-day onions: the longest day near 98641 is 15 h 50 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 98641 change?

Yes. The 2012 USDA map put 98641 in zone 8b; the 2023 map puts it in zone 9a. The newer map uses 1991–2020 data and more weather stations.