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

Planting zone for 97141 — Tillamook, OR

ZIP code 97141 (Tillamook, Tillamook County) is in USDA zone 9a: the coldest winter night averages 20 to 25 °F. The median last spring frost is April 5 and the first fall frost November 4.

Where ZIP 97141 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 frostApr 5

First frostNov 4

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 Tillamook, 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 Tillamook, 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 plantsMay 4only 10% chance of frost after

First fall frostNovember 4median — 10% chance by Oct 13

Growing season219 daysfrost-free, median

A hard freeze (28 °F) usually ends around February 19 and returns around December 4.

From the NOAA station Tillamook 6se, OR — 6 miles away, elevation 141 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 97141

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 9 – Sep 23

GarlicPlant cloves · Oct 21 – Nov 25

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 5) and first fall frost (Nov 4) 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 97141 came on Feb 13 — 9 days earlier than the 1991–2020 average (Feb 22).

average
Feb 222026
Feb 13

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).

Soil in Tillamook, OR

The soil mapped at the center of ZIP 97141 is Necanicum — slightly decomposed plant material, well drained.

TextureSlightly decomposed plant materialtop layer

pH4.5strongly acidic; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter75%high

Hydrologic groupBwater soaks in moderately

Farmland classNot prime farmlandUSDA classification

Map unit: Necanicum-Ascar-Klootchie complex, 60 to 90 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 97141; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Tillamook, OR

Summer high69 °Faverage high, August

Winter low37 °Faverage low, February

Hot days0days a year at 90 °F or more

Freezing nights33nights a year at 32 °F or less

Growing degree days1,227base 50 °F — the season’s usable heat

Longest day15 h 41 mindaylight on June 21

Shortest day8 h 42 mindaylight on December 21

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

Precipitation84.4 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: Tillamook 6se, OR (6 mi away); precipitation: Tillamook 6se, 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.

Oceanside, OR · 12 mi

971369a

Rockaway Beach, OR · 12 mi

Oregon planting zones →

Questions about 97141

What planting zone is ZIP code 97141?

ZIP code 97141 (Tillamook, 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 Tillamook, OR?

The median last spring frost (32 °F) near 97141 is April 5; after May 4 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Tillamook 6se station.

When is the first frost in Tillamook, OR?

The median first fall frost near 97141 is November 4, giving a median frost-free growing season of 219 days.

When should I plant tomatoes in 97141?

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 97141 get?

About 84.4 inches of precipitation a year (NOAA 1991–2020 normals, Tillamook 6se station).

How hot do summers get in Tillamook, OR?

The average high peaks at 69 °F in August, with about 0 days a year at 90 °F or more.

What kind of soil does 97141 have?

The USDA soil survey maps Necanicum at the center of ZIP 97141: slightly decomposed plant material, well drained, pH about 4.5 (strongly acidic).

Did spring come early in Tillamook, OR in 2026?

Spring leaf-out near 97141 came on Feb 13 in 2026, 9 days earlier than the 1991–2020 average (Feb 22), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Tillamook, OR?

Long-day onions: the longest day near 97141 is 15 h 41 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 97141 change?

Yes. The 2012 USDA map put 97141 in zone 8b; the 2023 map puts it in zone 9a. The newer map uses 1991–2020 data and more weather stations.