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

Planting zone for 98671 — Washougal, WA

ZIP code 98671 (Washougal, Clark County) is in USDA zone 8b: the coldest winter night averages 15 to 20 °F. The median last spring frost is April 29 and the first fall frost October 22.

Where ZIP 98671 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.

Zone8b15 to 20 °F
Coldest night−9.4 to −6.7 °C
Last frostApr 29
First frostOct 22
2012 zone8b

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 8b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Washougal, 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 Washougal, WA

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 29median — 50% chance of a later frost
Safe for tender plantsMay 15only 10% chance of frost after
First fall frostOctober 22median — 10% chance by Sep 27
Growing season177 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 28 and returns around November 14.

From the NOAA station Skamania Fish Hatchery, WA — 3 miles away, elevation 436 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 98671

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 18 – Apr 1
SpinachSow outdoors · Mar 18 – Apr 8
Broccoli, cabbageStart indoors · Feb 18 – Mar 4
Broccoli, cabbageTransplant · Apr 8 – Apr 22
Onion setsPlant outdoors · Apr 1 – Apr 15
PotatoesPlant outdoors · Apr 8 – Apr 22
LettuceSow outdoors · Apr 1 – Apr 15
Carrots, beetsSow outdoors · Apr 8 – Apr 22
TomatoesStart indoors · Mar 4 – Mar 18
TomatoesTransplant · May 6 – May 20
Peppers, eggplantStart indoors · Feb 18 – Mar 4
Peppers, eggplantTransplant · May 13 – May 27
BeansSow outdoors · May 6 – May 20
Sweet cornSow outdoors · May 6 – May 20
Cucumbers, squashSow outdoors · May 6 – May 20
Fall lettuce, spinachSow outdoors · Aug 27 – Sep 10
GarlicPlant cloves · Oct 8 – Nov 12
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 29) and first fall frost (Oct 22) 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 98671 came on Mar 1 — about the same time as the 1991–2020 average (Feb 28).

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 8b in Washington

614 plants native to the lower 48 states, recorded in Washington, and rated by the USDA to survive 15 °F or colder — the bottom of zone 8b. Each links to its USDA PLANTS profile.

Trees 32

Alaska cedar75 ft · blooms mid spring · low shade tolerance · to −22 °FAmerican sycamore100 ft · blooms spring · medium shade tolerance · to −34 °Fbalsam poplar80 ft · blooms late spring · high shade tolerance · to −79 °Fbigleaf maple60 ft · blooms mid spring · medium shade tolerance · to −14 °Fblack locust60 ft · blooms spring · high shade tolerance · to −37 °Fboxelder60 ft · blooms early spring · low shade tolerance · to −46 °F

Shrubs 114

alderleaf buckthorn3 ft · blooms late spring · low shade tolerance · to −33 °FAllegheny serviceberry35 ft · blooms early spring · low shade tolerance · to −38 °Falpine laurel1 ft · blooms late spring · low shade tolerance · to −28 °FAmerican plum24 ft · blooms mid spring · high shade tolerance · to −38 °Fantelope bitterbrush6 ft · blooms early spring · medium shade tolerance · to −36 °FBarclay's willow15 ft · high shade tolerance · to −43 °F

Wildflowers & perennials 293

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 157

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 3

riverbank grape45 ft · blooms late spring · medium shade tolerance · to −33 °Ftrumpet creeper2 ft · blooms summer · high shade tolerance · to −13 °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 Washougal, WA.

Soil in Washougal, WA

The soil mapped at the center of ZIP 98671 is Olympic — clay loam, well drained.

TextureClay loamholds water and nutrients; slow to drain and warm up
pH5.6moderately acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter5.5%high
Hydrologic groupCwater soaks in slowly
Farmland classFarmland of statewide importanceUSDA classification

Map unit: Olympic clay loam, 8 to 20 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 98671; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Washougal, WA

Summer high80 °Faverage high, August
Winter low33 °Faverage low, January
Hot days15days a year at 90 °F or more
Freezing nights81nights a year at 32 °F or less
Growing degree days1,861base 50 °F — the season’s usable heat
Longest day15 h 42 mindaylight on June 21
Shortest day8 h 41 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation83.3 inper year, rain and melted snow
Snowfall6 inper year; 1 days with snow on the ground

Average high and low, by month

20°30°40°50°60°70°80°90°32 °FJanuary: average high 44 °F, low 33 °F 44°33° JanFebruary: average high 49 °F, low 33 °F 49°33° FebMarch: average high 54 °F, low 35 °F 54°35° MarApril: average high 59 °F, low 38 °F 59°38° AprMay: average high 67 °F, low 43 °F 67°43° MayJune: average high 71 °F, low 47 °F 71°47° JunJuly: average high 79 °F, low 50 °F 79°50° JulAugust: average high 80 °F, low 50 °F 80°50° AugSeptember: average high 74 °F, low 46 °F 74°46° SepOctober: average high 62 °F, low 41 °F 62°41° OctNovember: average high 51 °F, low 37 °F 51°37° NovDecember: average high 44 °F, low 33 °F 44°33° Dec

Precipitation by month inches · ❄ = snowfall

0″2″4″6″8″10″12″January: 11.14 in precipitation, 2.1 in snowfall 11.1❄2 JanFebruary: 8.75 in precipitation, 1.9 in snowfall 8.8❄2 FebMarch: 8.86 in precipitation, 0.3 in snowfall 8.9 MarApril: 7.52 in precipitation 7.5 AprMay: 5.19 in precipitation 5.2 MayJune: 4.08 in precipitation 4.1 JunJuly: 0.90 in precipitation 0.9 JulAugust: 1.22 in precipitation 1.2 AugSeptember: 3.19 in precipitation 3.2 SepOctober: 7.82 in precipitation 7.8 OctNovember: 12.37 in precipitation, 0.4 in snowfall 12.4 NovDecember: 12.23 in precipitation, 1.5 in snowfall 12.2❄2 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Skamania Fish Hatchery, WA (3 mi away); precipitation: Skamania Fish Hatchery, WA (3 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.

986078b
Camas, WA · 5 mi
970609a
Troutdale, OR · 7 mi
970249a
Fairview, OR · 9 mi
970198b
Corbett, OR · 10 mi
970309a
Gresham, OR · 10 mi
970808b
Gresham, OR · 11 mi
986828b
Vancouver, WA · 11 mi
986838b
Vancouver, WA · 11 mi

Washington planting zones →

Questions about 98671

What planting zone is ZIP code 98671?

ZIP code 98671 (Washougal, WA) is in USDA hardiness zone 8b on the 2023 map: the coldest night of an average winter reaches 15 to 20 °F (−9.4 to −6.7 °C).

When is the last frost in Washougal, WA?

The median last spring frost (32 °F) near 98671 is April 29; after May 15 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Skamania Fish Hatchery station.

When is the first frost in Washougal, WA?

The median first fall frost near 98671 is October 22, giving a median frost-free growing season of 177 days.

When should I plant tomatoes in 98671?

Start tomato seeds indoors around Mar 4 – Mar 18 and set transplants outside around May 6 – May 20, one to three weeks after the median last frost.

How much rain and snow does 98671 get?

About 83.3 inches of precipitation a year and 6 inches of snowfall (NOAA 1991–2020 normals, Skamania Fish Hatchery station).

How hot do summers get in Washougal, WA?

The average high peaks at 80 °F in August, with about 15 days a year at 90 °F or more.

What kind of soil does 98671 have?

The USDA soil survey maps Olympic at the center of ZIP 98671: clay loam, well drained, pH about 5.6 (moderately acidic).

Did spring come early in Washougal, WA in 2026?

Spring leaf-out near 98671 came on Mar 1 in 2026, about the same as the 1991–2020 average (Feb 28), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Washougal, WA?

Long-day onions: the longest day near 98671 is 15 h 42 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).