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

Planting zone for 97071 — Woodburn, OR

ZIP code 97071 (Woodburn, Marion County) is in USDA zone 8b: the coldest winter night averages 15 to 20 °F. The median last spring frost is March 16 and the first fall frost November 14.

Where ZIP 97071 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 frostMar 16
First frostNov 14
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 Woodburn, 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 Woodburn, OR

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMarch 16median — 50% chance of a later frost
Safe for tender plantsApril 7only 10% chance of frost after
First fall frostNovember 14median — 10% chance by Oct 27
Growing season242 daysfrost-free, median

A hard freeze (28 °F) usually ends around February 15 and returns around December 1.

From the NOAA station Aurora State Airport, OR — 9 miles away, elevation 197 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 97071

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Feb 2 – Feb 16
SpinachSow outdoors · Feb 2 – Feb 23
Broccoli, cabbageStart indoors · Jan 5 – Jan 19
Broccoli, cabbageTransplant · Feb 23 – Mar 9
Onion setsPlant outdoors · Feb 16 – Mar 2
PotatoesPlant outdoors · Feb 23 – Mar 9
LettuceSow outdoors · Feb 16 – Mar 2
Carrots, beetsSow outdoors · Feb 23 – Mar 9
TomatoesStart indoors · Jan 19 – Feb 2
TomatoesTransplant · Mar 23 – Apr 6
Peppers, eggplantStart indoors · Jan 5 – Jan 19
Peppers, eggplantTransplant · Mar 30 – Apr 13
BeansSow outdoors · Mar 23 – Apr 6
Sweet cornSow outdoors · Mar 23 – Apr 6
Cucumbers, squashSow outdoors · Mar 23 – Apr 6
Fall lettuce, spinachSow outdoors · Sep 19 – Oct 3
GarlicPlant cloves · Oct 31 – Dec 5
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Mar 16) and first fall frost (Nov 14) 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 97071 came on Feb 19 — about the same time as the 1991–2020 average (Feb 17).

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 Oregon

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

Trees 43

Alaska cedar75 ft · blooms mid spring · low shade tolerance · to −22 °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 °FBrewer spruce100 ft · blooms early summer · low shade tolerance · to −13 °F

Shrubs 132

alderleaf buckthorn3 ft · blooms late spring · low shade tolerance · to −33 °Falderleaf mountain mahogany15 ft · blooms late spring · medium shade tolerance · to −41 °Falpine laurel1 ft · blooms late spring · low shade tolerance · to −28 °Fantelope bitterbrush6 ft · blooms early spring · medium shade tolerance · to −36 °Fbeaked hazelnut15 ft · blooms early spring · low shade tolerance · to −47 °Fbig sagebrush4 ft · blooms mid summer · high shade tolerance · to −43 °F

Wildflowers & perennials 305

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 166

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 2

riverbank grape45 ft · blooms late spring · medium shade tolerance · to −33 °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 Woodburn, OR.

Soil in Woodburn, OR

The soil mapped at the center of ZIP 97071 is Woodburn — silt loam, moderately well drained.

TextureSilt loama good balance for most vegetables
pH6.1slightly acidic; most vegetables like 6.0–7.0
DrainageModerately well drainednatural drainage class
Organic matter4%moderate
Hydrologic groupCwater soaks in slowly
Farmland classprime farmlandUSDA classification

Map unit: Woodburn 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 97071; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Woodburn, OR

Summer high83 °Faverage high, July
Winter low36 °Faverage low, January
Hot days18days a year at 90 °F or more
Freezing nights39nights a year at 32 °F or less
Growing degree days2,707base 50 °F — the season’s usable heat
Longest day15 h 38 mindaylight on June 21
Shortest day8 h 45 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation39.5 inper year, rain and melted snow

Average high and low, by month

30°40°50°60°70°80°90°32 °FJanuary: average high 49 °F, low 36 °F 49°36° JanFebruary: average high 53 °F, low 37 °F 53°37° FebMarch: average high 57 °F, low 39 °F 57°39° MarApril: average high 62 °F, low 43 °F 62°43° AprMay: average high 69 °F, low 48 °F 69°48° MayJune: average high 75 °F, low 52 °F 75°52° JunJuly: average high 83 °F, low 56 °F 83°56° JulAugust: average high 83 °F, low 56 °F 83°56° AugSeptember: average high 77 °F, low 52 °F 77°52° SepOctober: average high 64 °F, low 46 °F 64°46° OctNovember: average high 54 °F, low 40 °F 54°40° NovDecember: average high 48 °F, low 36 °F 48°36° Dec

Precipitation by month inches

0″2″4″6″January: 5.48 in precipitation 5.5 JanFebruary: 4.03 in precipitation 4.0 FebMarch: 4.39 in precipitation 4.4 MarApril: 3.37 in precipitation 3.4 AprMay: 2.55 in precipitation 2.5 MayJune: 1.47 in precipitation 1.5 JunJuly: 0.43 in precipitation 0.4 JulAugust: 0.52 in precipitation 0.5 AugSeptember: 1.58 in precipitation 1.6 SepOctober: 3.70 in precipitation 3.7 OctNovember: 5.80 in precipitation 5.8 NovDecember: 6.23 in precipitation 6.2 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Aurora State Airport, OR (9 mi away); precipitation: Aurora State Airport, OR (9 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 8b.

970328b
Hubbard, OR · 4 mi
970268b
Gervais, OR · 6 mi
973738b
Saint Benedict, OR · 6 mi
973628b
Mount Angel, OR · 6 mi
970208b
Donald, OR · 6 mi
970028b
Aurora, OR · 8 mi
971378b
Saint Paul, OR · 8 mi
973058b
Salem, OR · 10 mi

Oregon planting zones →

Questions about 97071

What planting zone is ZIP code 97071?

ZIP code 97071 (Woodburn, OR) 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 Woodburn, OR?

The median last spring frost (32 °F) near 97071 is March 16; after April 7 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Aurora State Airport station.

When is the first frost in Woodburn, OR?

The median first fall frost near 97071 is November 14, giving a median frost-free growing season of 242 days.

When should I plant tomatoes in 97071?

Start tomato seeds indoors around Jan 19 – Feb 2 and set transplants outside around Mar 23 – Apr 6, one to three weeks after the median last frost.

How much rain and snow does 97071 get?

About 39.5 inches of precipitation a year (NOAA 1991–2020 normals, Aurora State Airport station).

How hot do summers get in Woodburn, OR?

The average high peaks at 83 °F in July, with about 18 days a year at 90 °F or more.

What kind of soil does 97071 have?

The USDA soil survey maps Woodburn at the center of ZIP 97071: silt loam, moderately well drained, pH about 6.1 (slightly acidic).

Did spring come early in Woodburn, OR in 2026?

Spring leaf-out near 97071 came on Feb 19 in 2026, about the same as the 1991–2020 average (Feb 17), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Woodburn, OR?

Long-day onions: the longest day near 97071 is 15 h 38 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).