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

Planting zone for 97062 — Tualatin, OR

ZIP code 97062 (Tualatin, Washington County) is in USDA zone 9a: the coldest winter night averages 20 to 25 °F. The median last spring frost is March 18 and the first fall frost November 13.

Where ZIP 97062 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 18

First frostNov 13

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 Tualatin, OR…

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 Tualatin, OR

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostMarch 18median — 50% chance of a later frost

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

First fall frostNovember 13median — 10% chance by Oct 27

Growing season243 daysfrost-free, median

A hard freeze (28 °F) usually ends around February 13 and returns around December 1.

From the NOAA station N Willamette Exp Stn, OR — 6 miles away, elevation 151 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 97062

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Feb 4 – Feb 18

SpinachSow outdoors · Feb 4 – Feb 25

Broccoli, cabbageStart indoors · Jan 7 – Jan 21

Broccoli, cabbageTransplant · Feb 25 – Mar 11

Onion setsPlant outdoors · Feb 18 – Mar 4

PotatoesPlant outdoors · Feb 25 – Mar 11

LettuceSow outdoors · Feb 18 – Mar 4

Carrots, beetsSow outdoors · Feb 25 – Mar 11

TomatoesStart indoors · Jan 21 – Feb 4

TomatoesTransplant · Mar 25 – Apr 8

Peppers, eggplantStart indoors · Jan 7 – Jan 21

Peppers, eggplantTransplant · Apr 1 – Apr 15

BeansSow outdoors · Mar 25 – Apr 8

Sweet cornSow outdoors · Mar 25 – Apr 8

Cucumbers, squashSow outdoors · Mar 25 – Apr 8

Fall lettuce, spinachSow outdoors · Sep 18 – Oct 2

GarlicPlant cloves · Oct 30 – Dec 4

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Mar 18) and first fall frost (Nov 13) 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 97062 came on Feb 12 — 4 days earlier than the 1991–2020 average (Feb 16).

average
Feb 162026
Feb 12

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 9a in Oregon

666 plants native to the lower 48 states, recorded in Oregon, and rated by the USDA to survive 20 °F or colder — the bottom of zone 9a. 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 Tualatin, OR.

Soil in Tualatin, OR

The soil mapped at the center of ZIP 97062 is Huberly — silt loam, poorly drained.

TextureSilt loama good balance for most vegetables

pH6.0slightly acidic; most vegetables like 6.0–7.0

DrainagePoorly drainedconsider raised beds

Organic matter2.5%moderate

Hydrologic groupC/Dslow when drained; wet otherwise

Farmland classPrime farmland if drainedUSDA classification

Map unit: Huberly silt loam, 0 to 3 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 97062; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Tualatin, OR

Summer high82 °Faverage high, July

Winter low36 °Faverage low, January

Hot days16days a year at 90 °F or more

Freezing nights45nights a year at 32 °F or less

Growing degree days2,490base 50 °F — the season’s usable heat

Longest day15 h 40 mindaylight on June 21

Shortest day8 h 43 mindaylight on December 21

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

Precipitation50.4 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: N Willamette Exp Stn, OR (6 mi away); precipitation: West Linn 0.7 Nw, OR (6 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

972249a

Portland, OR · 3 mi

970359a

Lake Oswego, OR · 4 mi

970708b

Wilsonville, OR · 4 mi

970689a

West Linn, OR · 5 mi

970349a

Lake Oswego, OR · 5 mi

Marylhurst, OR · 6 mi

Oregon planting zones →

Questions about 97062

What planting zone is ZIP code 97062?

ZIP code 97062 (Tualatin, OR) 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 Tualatin, OR?

The median last spring frost (32 °F) near 97062 is March 18; after April 10 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, N Willamette Exp Stn station.

When is the first frost in Tualatin, OR?

The median first fall frost near 97062 is November 13, giving a median frost-free growing season of 243 days.

When should I plant tomatoes in 97062?

Start tomato seeds indoors around Jan 21 – Feb 4 and set transplants outside around Mar 25 – Apr 8, one to three weeks after the median last frost.

How much rain and snow does 97062 get?

About 50.4 inches of precipitation a year (NOAA 1991–2020 normals, West Linn 0.7 Nw station).

How hot do summers get in Tualatin, OR?

The average high peaks at 82 °F in July, with about 16 days a year at 90 °F or more.

What kind of soil does 97062 have?

The USDA soil survey maps Huberly at the center of ZIP 97062: silt loam, poorly drained, pH about 6.0 (slightly acidic).

Did spring come early in Tualatin, OR in 2026?

Spring leaf-out near 97062 came on Feb 12 in 2026, 4 days earlier than the 1991–2020 average (Feb 16), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Tualatin, OR?

Long-day onions: the longest day near 97062 is 15 h 40 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 97062 change?

Yes. The 2012 USDA map put 97062 in zone 8b; the 2023 map puts it in zone 9a. The newer map uses 1991–2020 data and more weather stations.