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

Planting zone for 98650 — Trout Lake, WA

ZIP code 98650 (Trout Lake, Klickitat County) is in USDA zone 7a: the coldest winter night averages 0 to 5 °F. The median last spring frost is May 18 and the first fall frost September 25.

Where ZIP 98650 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 18
First frostSep 25
2012 zone7a

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 7a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Trout Lake, 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 Trout Lake, WA

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMay 18median — 50% chance of a later frost
Safe for tender plantsJune 12only 10% chance of frost after
First fall frostSeptember 25median — 10% chance by Sep 4
Growing season125 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 29 and returns around October 9.

From the NOAA station Mt Adams Rs, WA — 4 miles away, elevation 1,949 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 98650

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Apr 6 – Apr 20
SpinachSow outdoors · Apr 6 – Apr 27
Broccoli, cabbageStart indoors · Mar 9 – Mar 23
Broccoli, cabbageTransplant · Apr 27 – May 11
Onion setsPlant outdoors · Apr 20 – May 4
PotatoesPlant outdoors · Apr 27 – May 11
LettuceSow outdoors · Apr 20 – May 4
Carrots, beetsSow outdoors · Apr 27 – May 11
TomatoesStart indoors · Mar 23 – Apr 6
TomatoesTransplant · May 25 – Jun 8
Peppers, eggplantStart indoors · Mar 9 – Mar 23
Peppers, eggplantTransplant · Jun 1 – Jun 15
BeansSow outdoors · May 25 – Jun 8
Sweet cornSow outdoors · May 25 – Jun 8
Cucumbers, squashSow outdoors · May 25 – Jun 8
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 18) 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 98650 came on Apr 2 — 8 days earlier than the 1991–2020 average (Apr 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).

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.

Trees 31

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 105

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 282

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 Trout Lake, WA.

Soil in Trout Lake, WA

The soil mapped at the center of ZIP 98650 is Kingtain — cobbly ashy loam, well drained.

TextureCobbly ashy loama good balance for most vegetables
pH6.5neutral; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter4%moderate
Hydrologic groupBwater soaks in moderately
Farmland classNot prime farmlandUSDA classification

Map unit: Kingtain cobbly ashy 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 98650; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Trout Lake, WA

Summer high84 °Faverage high, July
Winter low25 °Faverage low, December
Hot days19days a year at 90 °F or more
Freezing nights163nights a year at 32 °F or less
Growing degree days1,829base 50 °F — the season’s usable heat
Longest day15 h 45 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)
Precipitation29.8 inper year, rain and melted snow
Snowfall65 inper year; 42 days with snow on the ground

Average high and low, by month

10°20°30°40°50°60°70°80°90°32 °FJanuary: average high 39 °F, low 26 °F 39°26° JanFebruary: average high 43 °F, low 27 °F 43°27° FebMarch: average high 49 °F, low 29 °F 49°29° MarApril: average high 58 °F, low 33 °F 58°33° AprMay: average high 68 °F, low 40 °F 68°40° MayJune: average high 74 °F, low 45 °F 74°45° JunJuly: average high 84 °F, low 50 °F 84°50° JulAugust: average high 84 °F, low 49 °F 84°49° AugSeptember: average high 75 °F, low 42 °F 75°42° SepOctober: average high 60 °F, low 35 °F 60°35° OctNovember: average high 45 °F, low 30 °F 45°30° NovDecember: average high 37 °F, low 25 °F 37°25° Dec

Precipitation by month inches · ❄ = snowfall

0″2″4″6″January: 5.25 in precipitation, 22.2 in snowfall 5.3❄22 JanFebruary: 3.50 in precipitation, 7.1 in snowfall 3.5❄7 FebMarch: 3.08 in precipitation, 6 in snowfall 3.1❄6 MarApril: 1.28 in precipitation, 0.1 in snowfall 1.3 AprMay: 1.41 in precipitation 1.4 MayJune: 0.58 in precipitation 0.6 JunJuly: 0.27 in precipitation 0.3 JulAugust: 0.46 in precipitation 0.5 AugSeptember: 0.91 in precipitation 0.9 SepOctober: 2.79 in precipitation, 0.3 in snowfall 2.8 OctNovember: 4.18 in precipitation, 6.2 in snowfall 4.2❄6 NovDecember: 6.09 in precipitation, 23.4 in snowfall 6.1❄23 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Mt Adams Rs, WA (4 mi away); precipitation: Glenwood #2, WA (14 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

986727b
White Salmon, WA · 9 mi
986238a
Husum, WA · 10 mi
986197a
Glenwood, WA · 13 mi
986027a
Appleton, WA · 13 mi
986057b
Bingen, WA · 13 mi
986518a
Underwood, WA · 14 mi
970317b
Hood River, OR · 23 mi
970407b
Mosier, OR · 24 mi

Washington planting zones →

Questions about 98650

What planting zone is ZIP code 98650?

ZIP code 98650 (Trout Lake, 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 Trout Lake, WA?

The median last spring frost (32 °F) near 98650 is May 18; after June 12 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Mt Adams Rs station.

When is the first frost in Trout Lake, WA?

The median first fall frost near 98650 is September 25, giving a median frost-free growing season of 125 days.

When should I plant tomatoes in 98650?

Start tomato seeds indoors around Mar 23 – Apr 6 and set transplants outside around May 25 – Jun 8, one to three weeks after the median last frost.

How much rain and snow does 98650 get?

About 29.8 inches of precipitation a year and 65 inches of snowfall (NOAA 1991–2020 normals, Glenwood #2 station).

How hot do summers get in Trout Lake, WA?

The average high peaks at 84 °F in July, with about 19 days a year at 90 °F or more.

What kind of soil does 98650 have?

The USDA soil survey maps Kingtain at the center of ZIP 98650: cobbly ashy loam, well drained, pH about 6.5 (neutral).

Did spring come early in Trout Lake, WA in 2026?

Spring leaf-out near 98650 came on Apr 2 in 2026, 8 days earlier than the 1991–2020 average (Apr 10), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Trout Lake, WA?

Long-day onions: the longest day near 98650 is 15 h 45 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).