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

Planting zone for 97115 — Dundee, OR

ZIP code 97115 (Dundee, Yamhill County) is in USDA zone 8b: the coldest winter night averages 15 to 20 °F. The median last spring frost is March 21 and the first fall frost November 22.

Where ZIP 97115 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 21
First frostNov 22
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 Dundee, 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 Dundee, OR

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMarch 21median — 50% chance of a later frost
Safe for tender plantsApril 19only 10% chance of frost after
First fall frostNovember 22median — 10% chance by Nov 4
Growing season241 daysfrost-free, median

A hard freeze (28 °F) usually ends around February 15 and returns around December 10.

From the NOAA station Rex 1 S, OR — 6 miles away, elevation 515 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 97115

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Feb 7 – Feb 21
SpinachSow outdoors · Feb 7 – Feb 28
Broccoli, cabbageStart indoors · Jan 10 – Jan 24
Broccoli, cabbageTransplant · Feb 28 – Mar 14
Onion setsPlant outdoors · Feb 21 – Mar 7
PotatoesPlant outdoors · Feb 28 – Mar 14
LettuceSow outdoors · Feb 21 – Mar 7
Carrots, beetsSow outdoors · Feb 28 – Mar 14
TomatoesStart indoors · Jan 24 – Feb 7
TomatoesTransplant · Mar 28 – Apr 11
Peppers, eggplantStart indoors · Jan 10 – Jan 24
Peppers, eggplantTransplant · Apr 4 – Apr 18
BeansSow outdoors · Mar 28 – Apr 11
Sweet cornSow outdoors · Mar 28 – Apr 11
Cucumbers, squashSow outdoors · Mar 28 – Apr 11
Fall lettuce, spinachSow outdoors · Sep 27 – Oct 11
GarlicPlant cloves · Nov 8 – Dec 13
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Mar 21) and first fall frost (Nov 22) 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 97115 came on Feb 22 — about the same time as the 1991–2020 average (Feb 23).

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 Dundee, OR.

Soil in Dundee, OR

The soil mapped at the center of ZIP 97115 is Jory — silty clay loam, well drained.

TextureSilty clay loamholds water and nutrients; slow to drain and warm up
pH5.6moderately acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter5%high
Hydrologic groupCwater soaks in slowly
Farmland classFarmland of statewide importanceUSDA classification

Map unit: Jory silty clay loam, 12 to 20 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 97115; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Dundee, OR

Summer high81 °Faverage high, July
Winter low34 °Faverage low, December
Hot days15days a year at 90 °F or more
Freezing nights43nights a year at 32 °F or less
Growing degree days2,381base 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)
Precipitation44.2 inper year, rain and melted snow
Snowfall1 inper year

Average high and low, by month

20°30°40°50°60°70°80°90°32 °FJanuary: average high 45 °F, low 35 °F 45°35° JanFebruary: average high 50 °F, low 36 °F 50°36° FebMarch: average high 55 °F, low 38 °F 55°38° MarApril: average high 61 °F, low 41 °F 61°41° AprMay: average high 66 °F, low 47 °F 66°47° MayJune: average high 72 °F, low 51 °F 72°51° JunJuly: average high 81 °F, low 56 °F 81°56° JulAugust: average high 81 °F, low 56 °F 81°56° AugSeptember: average high 75 °F, low 52 °F 75°52° SepOctober: average high 62 °F, low 45 °F 62°45° OctNovember: average high 51 °F, low 39 °F 51°39° NovDecember: average high 44 °F, low 34 °F 44°34° Dec

Precipitation by month inches · ❄ = snowfall

0″2″4″6″8″January: 6.38 in precipitation, 0.6 in snowfall 6.4❄1 JanFebruary: 4.56 in precipitation, 0.1 in snowfall 4.6 FebMarch: 4.77 in precipitation, 0.2 in snowfall 4.8 MarApril: 3.56 in precipitation 3.6 AprMay: 2.57 in precipitation 2.6 MayJune: 1.58 in precipitation 1.6 JunJuly: 0.43 in precipitation 0.4 JulAugust: 0.55 in precipitation 0.6 AugSeptember: 1.63 in precipitation 1.6 SepOctober: 4.17 in precipitation 4.2 OctNovember: 6.65 in precipitation 6.7 NovDecember: 7.37 in precipitation, 0.1 in snowfall 7.4 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Rex 1 S, OR (6 mi away); precipitation: Rex 1 S, OR (6 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 8b.

971328b
Newberg, OR · 4 mi
971278b
Lafayette, OR · 5 mi
971378b
Saint Paul, OR · 6 mi
971148b
Dayton, OR · 7 mi
971118b
Carlton, OR · 8 mi
971408b
Sherwood, OR · 9 mi
970208b
Donald, OR · 10 mi
970028b
Aurora, OR · 12 mi

Oregon planting zones →

Questions about 97115

What planting zone is ZIP code 97115?

ZIP code 97115 (Dundee, 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 Dundee, OR?

The median last spring frost (32 °F) near 97115 is March 21; after April 19 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Rex 1 S station.

When is the first frost in Dundee, OR?

The median first fall frost near 97115 is November 22, giving a median frost-free growing season of 241 days.

When should I plant tomatoes in 97115?

Start tomato seeds indoors around Jan 24 – Feb 7 and set transplants outside around Mar 28 – Apr 11, one to three weeks after the median last frost.

How much rain and snow does 97115 get?

About 44.2 inches of precipitation a year and 1 inches of snowfall (NOAA 1991–2020 normals, Rex 1 S station).

How hot do summers get in Dundee, OR?

The average high peaks at 81 °F in July, with about 15 days a year at 90 °F or more.

What kind of soil does 97115 have?

The USDA soil survey maps Jory at the center of ZIP 97115: silty clay loam, well drained, pH about 5.6 (moderately acidic).

Did spring come early in Dundee, OR in 2026?

Spring leaf-out near 97115 came on Feb 22 in 2026, about the same as the 1991–2020 average (Feb 23), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Dundee, OR?

Long-day onions: the longest day near 97115 is 15 h 39 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).