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

Planting zone for 97128 — Mcminnville, OR

ZIP code 97128 (Mcminnville, Yamhill County) is in USDA zone 8b: the coldest winter night averages 15 to 20 °F. The median last spring frost is April 5 and the first fall frost November 7.

Where ZIP 97128 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 frostApr 5
First frostNov 7
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 Mcminnville, 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 Mcminnville, OR

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 5median — 50% chance of a later frost
Safe for tender plantsApril 27only 10% chance of frost after
First fall frostNovember 7median — 10% chance by Oct 20
Growing season216 daysfrost-free, median

A hard freeze (28 °F) usually ends around February 20 and returns around November 28.

From the NOAA station Mc Minnville, OR — 6 miles away, elevation 154 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 97128

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Feb 22 – Mar 8
SpinachSow outdoors · Feb 22 – Mar 15
Broccoli, cabbageStart indoors · Jan 25 – Feb 8
Broccoli, cabbageTransplant · Mar 15 – Mar 29
Onion setsPlant outdoors · Mar 8 – Mar 22
PotatoesPlant outdoors · Mar 15 – Mar 29
LettuceSow outdoors · Mar 8 – Mar 22
Carrots, beetsSow outdoors · Mar 15 – Mar 29
TomatoesStart indoors · Feb 8 – Feb 22
TomatoesTransplant · Apr 12 – Apr 26
Peppers, eggplantStart indoors · Jan 25 – Feb 8
Peppers, eggplantTransplant · Apr 19 – May 3
BeansSow outdoors · Apr 12 – Apr 26
Sweet cornSow outdoors · Apr 12 – Apr 26
Cucumbers, squashSow outdoors · Apr 12 – Apr 26
Fall lettuce, spinachSow outdoors · Sep 12 – Sep 26
GarlicPlant cloves · Oct 24 – Nov 28
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 5) and first fall frost (Nov 7) 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 97128 came on Feb 18 — 3 days earlier than the 1991–2020 average (Feb 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 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 Mcminnville, OR.

Soil in Mcminnville, OR

The soil mapped at the center of ZIP 97128 is Gellatly — silty clay loam, well drained.

TextureSilty clay loamholds water and nutrients; slow to drain and warm up
pH6.1slightly acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter5.5%high
Hydrologic groupCwater soaks in slowly
Farmland classFarmland of statewide importanceUSDA classification

Map unit: Gellatly-Dixonville complex, 20 to 30 percent south 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 97128; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Mcminnville, OR

Summer high83 °Faverage high, July
Winter low35 °Faverage low, December
Hot days19days a year at 90 °F or more
Freezing nights46nights a year at 32 °F or less
Growing degree days2,476base 50 °F — the season’s usable heat
Longest day15 h 39 mindaylight on June 21
Shortest day8 h 44 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation57.3 inper year, rain and melted snow

Average high and low, by month

20°30°40°50°60°70°80°90°32 °FJanuary: average high 47 °F, low 36 °F 47°36° JanFebruary: average high 51 °F, low 36 °F 51°36° FebMarch: average high 56 °F, low 38 °F 56°38° MarApril: average high 62 °F, low 41 °F 62°41° AprMay: average high 70 °F, low 46 °F 70°46° MayJune: average high 75 °F, low 50 °F 75°50° JunJuly: average high 83 °F, low 54 °F 83°54° JulAugust: average high 83 °F, low 54 °F 83°54° AugSeptember: average high 77 °F, low 50 °F 77°50° SepOctober: average high 64 °F, low 44 °F 64°44° OctNovember: average high 53 °F, low 39 °F 53°39° NovDecember: average high 46 °F, low 35 °F 46°35° Dec

Precipitation by month inches

0″2″4″6″8″10″12″January: 9.55 in precipitation 9.6 JanFebruary: 6.99 in precipitation 7.0 FebMarch: 5.66 in precipitation 5.7 MarApril: 3.73 in precipitation 3.7 AprMay: 2.69 in precipitation 2.7 MayJune: 1.43 in precipitation 1.4 JunJuly: 0.30 in precipitation 0.3 JulAugust: 0.54 in precipitation 0.5 AugSeptember: 1.52 in precipitation 1.5 SepOctober: 4.92 in precipitation 4.9 OctNovember: 8.83 in precipitation 8.8 NovDecember: 11.09 in precipitation 11.1 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Mc Minnville, OR (6 mi away); precipitation: Miller Woods, OR (2 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 8b.

971118b
Carlton, OR · 7 mi
971278b
Lafayette, OR · 9 mi
971018b
Amity, OR · 9 mi
971148b
Dayton, OR · 10 mi
971488b
Yamhill, OR · 10 mi
973788b
Sheridan, OR · 11 mi
971158b
Dundee, OR · 13 mi
973968b
Willamina, OR · 15 mi

Oregon planting zones →

Questions about 97128

What planting zone is ZIP code 97128?

ZIP code 97128 (Mcminnville, 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 Mcminnville, OR?

The median last spring frost (32 °F) near 97128 is April 5; after April 27 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Mc Minnville station.

When is the first frost in Mcminnville, OR?

The median first fall frost near 97128 is November 7, giving a median frost-free growing season of 216 days.

When should I plant tomatoes in 97128?

Start tomato seeds indoors around Feb 8 – Feb 22 and set transplants outside around Apr 12 – Apr 26, one to three weeks after the median last frost.

How much rain and snow does 97128 get?

About 57.3 inches of precipitation a year (NOAA 1991–2020 normals, Miller Woods station).

How hot do summers get in Mcminnville, OR?

The average high peaks at 83 °F in July, with about 19 days a year at 90 °F or more.

What kind of soil does 97128 have?

The USDA soil survey maps Gellatly at the center of ZIP 97128: silty clay loam, well drained, pH about 6.1 (slightly acidic).

Did spring come early in Mcminnville, OR in 2026?

Spring leaf-out near 97128 came on Feb 18 in 2026, 3 days earlier than the 1991–2020 average (Feb 21), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Mcminnville, OR?

Long-day onions: the longest day near 97128 is 15 h 39 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).