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

Planting zone for 97267 — Portland, OR

ZIP code 97267 (Portland, Clackamas 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 18.

Where ZIP 97267 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 18

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 Portland, 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 Portland, 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 11only 10% chance of frost after

First fall frostNovember 18median — 10% chance by Oct 30

Growing season244 daysfrost-free, median

A hard freeze (28 °F) usually ends around February 12 and returns around December 8.

From the NOAA station Oregon City, OR — 4 miles away, elevation 167 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 97267

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 23 – Oct 7

GarlicPlant cloves · Nov 4 – Dec 9

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Mar 18) and first fall frost (Nov 18) 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 97267 came on Feb 8 — 8 days earlier than the 1991–2020 average (Feb 16).

average
Feb 162026
Feb 8

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 Portland, OR.

Soil in Portland, OR

The soil mapped at the center of ZIP 97267 is Powell — silt loam, somewhat poorly drained.

TextureSilt loama good balance for most vegetables

pH5.6moderately acidic; most vegetables like 6.0–7.0

DrainageSomewhat poorly drainedconsider raised beds

Organic matter5%high

Hydrologic groupDwater soaks in very slowly

Farmland classPrime farmland if drainedUSDA classification

Map unit: Powell silt loam, 0 to 8 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 97267; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Portland, OR

Summer high84 °Faverage high, July

Winter low36 °Faverage low, December

Hot days20days a year at 90 °F or more

Freezing nights30nights a year at 32 °F or less

Growing degree days2,908base 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: Oregon City, OR (4 mi away); precipitation: West Linn 0.7 Nw, OR (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.

970279a

Gladstone, OR · 2 mi

970369a

Marylhurst, OR · 2 mi

972229a

Portland, OR · 2 mi

970349a

Lake Oswego, OR · 4 mi

Happy Valley, OR · 5 mi

972069a

Portland, OR · 5 mi

All 59 ZIP codes in Portland → · Oregon planting zones →

Questions about 97267

What planting zone is ZIP code 97267?

ZIP code 97267 (Portland, 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 Portland, OR?

The median last spring frost (32 °F) near 97267 is March 18; after April 11 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Oregon City station.

When is the first frost in Portland, OR?

The median first fall frost near 97267 is November 18, giving a median frost-free growing season of 244 days.

When should I plant tomatoes in 97267?

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 97267 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 Portland, OR?

The average high peaks at 84 °F in July, with about 20 days a year at 90 °F or more.

What kind of soil does 97267 have?

The USDA soil survey maps Powell at the center of ZIP 97267: silt loam, somewhat poorly drained, pH about 5.6 (moderately acidic).

Did spring come early in Portland, OR in 2026?

Spring leaf-out near 97267 came on Feb 8 in 2026, 8 days earlier than the 1991–2020 average (Feb 16), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Portland, OR?

Long-day onions: the longest day near 97267 is 15 h 40 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 97267 change?

Yes. The 2012 USDA map put 97267 in zone 8b; the 2023 map puts it in zone 9a. The newer map uses 1991–2020 data and more weather stations.