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

Planting zone for 98620 — Goldendale, WA

ZIP code 98620 (Goldendale, Klickitat County) is in USDA zone 7a: the coldest winter night averages 0 to 5 °F. The median last spring frost is May 19 and the first fall frost September 25.

Where ZIP 98620 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.

Zone7a0 to 5 °F

Coldest night−17.8 to −15 °C

Last frostMay 19

First frostSep 25

2012 zone6b

Was 6b 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 7a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Goldendale, 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 Goldendale, WA

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostMay 19median — 50% chance of a later frost

Safe for tender plantsJune 9only 10% chance of frost after

First fall frostSeptember 25median — 10% chance by Sep 8

Growing season126 daysfrost-free, median

A hard freeze (28 °F) usually ends around May 1 and returns around October 7.

From the NOAA station Goldendale, WA — 6 miles away, elevation 1,641 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 98620

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Apr 7 – Apr 21

SpinachSow outdoors · Apr 7 – Apr 28

Broccoli, cabbageStart indoors · Mar 10 – Mar 24

Broccoli, cabbageTransplant · Apr 28 – May 12

Onion setsPlant outdoors · Apr 21 – May 5

PotatoesPlant outdoors · Apr 28 – May 12

LettuceSow outdoors · Apr 21 – May 5

Carrots, beetsSow outdoors · Apr 28 – May 12

TomatoesStart indoors · Mar 24 – Apr 7

TomatoesTransplant · May 26 – Jun 9

Peppers, eggplantStart indoors · Mar 10 – Mar 24

Peppers, eggplantTransplant · Jun 2 – Jun 16

BeansSow outdoors · May 26 – Jun 9

Sweet cornSow outdoors · May 26 – Jun 9

Cucumbers, squashSow outdoors · May 26 – Jun 9

Fall lettuce, spinachSow outdoors · Jul 31 – Aug 14

GarlicPlant cloves · Sep 11 – Oct 16

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 19) and first fall frost (Sep 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 98620 came on Mar 21 — 12 days earlier than the 1991–2020 average (Apr 2).

average
Apr 22026
Mar 21

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 7a in Washington

590 plants native to the lower 48 states, recorded in Washington, and rated by the USDA to survive 0 °F or colder — the bottom of zone 7a. 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 Goldendale, WA.

Soil in Goldendale, WA

The soil mapped at the center of ZIP 98620 is Lyville — bouldery loam, well drained.

TextureBouldery loama good balance for most vegetables

pH6.7neutral; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter3%moderate

Hydrologic groupBwater soaks in moderately

Farmland classNot prime farmlandUSDA classification

Map unit: Lyville bouldery loam, 2 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 98620; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Goldendale, WA

Summer high86 °Faverage high, July

Winter low24 °Faverage low, January

Hot days35days a year at 90 °F or more

Freezing nights144nights a year at 32 °F or less

Growing degree days1,953base 50 °F — the season’s usable heat

Longest day15 h 44 mindaylight on June 21

Shortest day8 h 39 mindaylight on December 21

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

Precipitation17.9 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: Goldendale, WA (6 mi away); precipitation: Goldendale 4.2 Nnw, WA (3 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

986137b

Centerville, WA · 12 mi

970508a

Rufus, OR · 14 mi

986287b

Klickitat, WA · 14 mi

986737b

Wishram, WA · 16 mi

986707b

Wahkiacus, WA · 18 mi

Dallesport, WA · 23 mi

Washington planting zones →

Questions about 98620

What planting zone is ZIP code 98620?

ZIP code 98620 (Goldendale, WA) is in USDA hardiness zone 7a on the 2023 map: the coldest night of an average winter reaches 0 to 5 °F (−17.8 to −15 °C).

When is the last frost in Goldendale, WA?

The median last spring frost (32 °F) near 98620 is May 19; after June 9 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Goldendale station.

When is the first frost in Goldendale, WA?

The median first fall frost near 98620 is September 25, giving a median frost-free growing season of 126 days.

When should I plant tomatoes in 98620?

Start tomato seeds indoors around Mar 24 – Apr 7 and set transplants outside around May 26 – Jun 9, one to three weeks after the median last frost.

How much rain and snow does 98620 get?

About 17.9 inches of precipitation a year (NOAA 1991–2020 normals, Goldendale 4.2 Nnw station).

How hot do summers get in Goldendale, WA?

The average high peaks at 86 °F in July, with about 35 days a year at 90 °F or more.

What kind of soil does 98620 have?

The USDA soil survey maps Lyville at the center of ZIP 98620: bouldery loam, well drained, pH about 6.7 (neutral).

Did spring come early in Goldendale, WA in 2026?

Spring leaf-out near 98620 came on Mar 21 in 2026, 12 days earlier than the 1991–2020 average (Apr 2), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Goldendale, WA?

Long-day onions: the longest day near 98620 is 15 h 44 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 98620 change?

Yes. The 2012 USDA map put 98620 in zone 6b; the 2023 map puts it in zone 7a. The newer map uses 1991–2020 data and more weather stations.