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

Planting zone for 97423 — Coquille, OR

ZIP code 97423 (Coquille, Coos County) is in USDA zone 9a: the coldest winter night averages 20 to 25 °F. The median last spring frost is March 28 and the first fall frost November 6.

Where ZIP 97423 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 28
First frostNov 6
2012 zone9a

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 9a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Coquille, 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 Coquille, OR

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMarch 28median — 50% chance of a later frost
Safe for tender plantsApril 27only 10% chance of frost after
First fall frostNovember 6median — 10% chance by Oct 17
Growing season225 daysfrost-free, median

A hard freeze (28 °F) usually ends around February 16 and returns around December 2.

From the NOAA station Coquille City, OR — within 1 mile, elevation 23 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 97423

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Feb 14 – Feb 28
SpinachSow outdoors · Feb 14 – Mar 7
Broccoli, cabbageStart indoors · Jan 17 – Jan 31
Broccoli, cabbageTransplant · Mar 7 – Mar 21
Onion setsPlant outdoors · Feb 28 – Mar 14
PotatoesPlant outdoors · Mar 7 – Mar 21
LettuceSow outdoors · Feb 28 – Mar 14
Carrots, beetsSow outdoors · Mar 7 – Mar 21
TomatoesStart indoors · Jan 31 – Feb 14
TomatoesTransplant · Apr 4 – Apr 18
Peppers, eggplantStart indoors · Jan 17 – Jan 31
Peppers, eggplantTransplant · Apr 11 – Apr 25
BeansSow outdoors · Apr 4 – Apr 18
Sweet cornSow outdoors · Apr 4 – Apr 18
Cucumbers, squashSow outdoors · Apr 4 – Apr 18
Fall lettuce, spinachSow outdoors · Sep 11 – Sep 25
GarlicPlant cloves · Oct 23 – Nov 27
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Mar 28) and first fall frost (Nov 6) 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 97423 came on Feb 1 — 5 days earlier than the 1991–2020 average (Feb 6).

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.

Trees 44

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 °FBishop pine90 ft · blooms mid spring · low shade tolerance · to 17 °Fblack locust60 ft · blooms spring · high shade tolerance · to −37 °Fboxelder60 ft · blooms early spring · low shade tolerance · to −46 °F

Shrubs 133

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 169

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 Coquille, OR.

Soil in Coquille, OR

The soil mapped at the center of ZIP 97423 is Honeygrove — 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 groupCwater soaks in slowly
Farmland classNot prime farmlandUSDA classification

Map unit: Honeygrove silty clay loam, 3 to 30 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 97423; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Coquille, OR

Summer high74 °Faverage high, August
Winter low36 °Faverage low, December
Hot days1days a year at 90 °F or more
Freezing nights38nights a year at 32 °F or less
Growing degree days1,858base 50 °F — the season’s usable heat
Longest day15 h 23 mindaylight on June 21
Shortest day8 h 59 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation54.9 inper year, rain and melted snow

Average high and low, by month

30°40°50°60°70°80°32 °FJanuary: average high 55 °F, low 37 °F 55°37° JanFebruary: average high 57 °F, low 37 °F 57°37° FebMarch: average high 58 °F, low 39 °F 58°39° MarApril: average high 60 °F, low 41 °F 60°41° AprMay: average high 65 °F, low 45 °F 65°45° MayJune: average high 68 °F, low 48 °F 68°48° JunJuly: average high 72 °F, low 52 °F 72°52° JulAugust: average high 74 °F, low 51 °F 74°51° AugSeptember: average high 73 °F, low 48 °F 73°48° SepOctober: average high 67 °F, low 43 °F 67°43° OctNovember: average high 59 °F, low 40 °F 59°40° NovDecember: average high 54 °F, low 36 °F 54°36° Dec

Precipitation by month inches

0″2″4″6″8″10″January: 8.72 in precipitation, 0.1 in snowfall 8.7 JanFebruary: 6.61 in precipitation 6.6 FebMarch: 7.06 in precipitation 7.1 MarApril: 5.01 in precipitation 5.0 AprMay: 2.73 in precipitation 2.7 MayJune: 1.44 in precipitation 1.4 JunJuly: 0.34 in precipitation 0.3 JulAugust: 0.37 in precipitation 0.4 AugSeptember: 1.26 in precipitation 1.3 SepOctober: 3.65 in precipitation 3.6 OctNovember: 7.66 in precipitation 7.7 NovDecember: 10.01 in precipitation, 0.1 in snowfall 10.0 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Coquille City, OR (within 1 mile); precipitation: Coquille City, OR (within 1 mile). 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.

974209a
Coos Bay, OR · 12 mi
974119b
Bandon, OR · 12 mi
974589a
Myrtle Point, OR · 13 mi
974149a
Broadbent, OR · 15 mi
974079a
Allegany, OR · 18 mi
974599a
North Bend, OR · 21 mi
974509a
Langlois, OR · 22 mi
974669a
Powers, OR · 24 mi

Oregon planting zones →

Questions about 97423

What planting zone is ZIP code 97423?

ZIP code 97423 (Coquille, 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 Coquille, OR?

The median last spring frost (32 °F) near 97423 is March 28; after April 27 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Coquille City station.

When is the first frost in Coquille, OR?

The median first fall frost near 97423 is November 6, giving a median frost-free growing season of 225 days.

When should I plant tomatoes in 97423?

Start tomato seeds indoors around Jan 31 – Feb 14 and set transplants outside around Apr 4 – Apr 18, one to three weeks after the median last frost.

How much rain and snow does 97423 get?

About 54.9 inches of precipitation a year (NOAA 1991–2020 normals, Coquille City station).

How hot do summers get in Coquille, OR?

The average high peaks at 74 °F in August, with about 1 days a year at 90 °F or more.

What kind of soil does 97423 have?

The USDA soil survey maps Honeygrove at the center of ZIP 97423: slightly decomposed plant material, well drained, pH about 4.5 (strongly acidic).

Did spring come early in Coquille, OR in 2026?

Spring leaf-out near 97423 came on Feb 1 in 2026, 5 days earlier than the 1991–2020 average (Feb 6), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Coquille, OR?

Long-day onions: the longest day near 97423 is 15 h 23 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).