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

Planting zone for 97406 — Agness, OR

ZIP code 97406 (Agness, Curry County) is in USDA zone 9a: the coldest winter night averages 20 to 25 °F. The median last spring frost is March 30 and the first fall frost November 17.

Where ZIP 97406 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 30
First frostNov 17
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 Agness, 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 Agness, OR

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMarch 30median — 50% chance of a later frost
Safe for tender plantsMay 2only 10% chance of frost after
First fall frostNovember 17median — 10% chance by Oct 20
Growing season233 daysfrost-free, median

A hard freeze (28 °F) usually ends around February 1 and returns around December 10.

From the NOAA station Illahe, OR — 2 miles away, elevation 348 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 97406

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Feb 16 – Mar 2
SpinachSow outdoors · Feb 16 – Mar 9
Broccoli, cabbageStart indoors · Jan 19 – Feb 2
Broccoli, cabbageTransplant · Mar 9 – Mar 23
Onion setsPlant outdoors · Mar 2 – Mar 16
PotatoesPlant outdoors · Mar 9 – Mar 23
LettuceSow outdoors · Mar 2 – Mar 16
Carrots, beetsSow outdoors · Mar 9 – Mar 23
TomatoesStart indoors · Feb 2 – Feb 16
TomatoesTransplant · Apr 6 – Apr 20
Peppers, eggplantStart indoors · Jan 19 – Feb 2
Peppers, eggplantTransplant · Apr 13 – Apr 27
BeansSow outdoors · Apr 6 – Apr 20
Sweet cornSow outdoors · Apr 6 – Apr 20
Cucumbers, squashSow outdoors · Apr 6 – Apr 20
Fall lettuce, spinachSow outdoors · Sep 22 – Oct 6
GarlicPlant cloves · Nov 3 – Dec 8
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Mar 30) and first fall frost (Nov 17) 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 97406 came on Feb 2 — 7 days earlier than the 1991–2020 average (Feb 9).

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 Agness, OR

The soil mapped at the center of ZIP 97406 is Brandypeak — 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: Brandypeak-Bearcamp-Woodseye complex, 60 to 90 percent north 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 97406; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Agness, OR

Summer high91 °Faverage high, August
Winter low36 °Faverage low, December
Hot days49days a year at 90 °F or more
Freezing nights19nights a year at 32 °F or less
Growing degree days2,984base 50 °F — the season’s usable heat
Longest day15 h 19 mindaylight on June 21
Shortest day9 h 03 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation58.6 inper year, rain and melted snow
Snowfall1 inper year

Average high and low, by month

30°40°50°60°70°80°90°100°32 °FJanuary: average high 51 °F, low 37 °F 51°37° JanFebruary: average high 54 °F, low 38 °F 54°38° FebMarch: average high 59 °F, low 39 °F 59°39° MarApril: average high 65 °F, low 40 °F 65°40° AprMay: average high 75 °F, low 43 °F 75°43° MayJune: average high 81 °F, low 49 °F 81°49° JunJuly: average high 90 °F, low 52 °F 90°52° JulAugust: average high 91 °F, low 52 °F 91°52° AugSeptember: average high 86 °F, low 48 °F 86°48° SepOctober: average high 69 °F, low 44 °F 69°44° OctNovember: average high 55 °F, low 40 °F 55°40° NovDecember: average high 51 °F, low 36 °F 51°36° Dec

Precipitation by month inches · ❄ = snowfall

0″2″4″6″8″10″January: 9.37 in precipitation, 0.3 in snowfall 9.4 JanFebruary: 7.49 in precipitation, 0.2 in snowfall 7.5 FebMarch: 7.88 in precipitation 7.9 MarApril: 5.42 in precipitation 5.4 AprMay: 2.90 in precipitation 2.9 MayJune: 1.31 in precipitation 1.3 JunJuly: 0.29 in precipitation 0.3 JulAugust: 0.32 in precipitation 0.3 AugSeptember: 1.13 in precipitation 1.1 SepOctober: 3.76 in precipitation 3.8 OctNovember: 7.93 in precipitation 7.9 NovDecember: 10.82 in precipitation, 0.1 in snowfall 10.8 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Illahe, OR (2 mi away); precipitation: Powers, OR (19 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

6 of the 8 nearest ZIP codes are in a different zone — elevation and distance from water change winter lows quickly.

974669a
Powers, OR · 16 mi
974919b
Wedderburn, OR · 19 mi
974649b
Ophir, OR · 19 mi
974659b
Port Orford, OR · 19 mi
974449b
Gold Beach, OR · 20 mi
975328b
Merlin, OR · 20 mi
974769b
Sixes, OR · 25 mi
974149a
Broadbent, OR · 25 mi

Oregon planting zones →

Questions about 97406

What planting zone is ZIP code 97406?

ZIP code 97406 (Agness, 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 Agness, OR?

The median last spring frost (32 °F) near 97406 is March 30; after May 2 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Illahe station.

When is the first frost in Agness, OR?

The median first fall frost near 97406 is November 17, giving a median frost-free growing season of 233 days.

When should I plant tomatoes in 97406?

Start tomato seeds indoors around Feb 2 – Feb 16 and set transplants outside around Apr 6 – Apr 20, one to three weeks after the median last frost.

How much rain and snow does 97406 get?

About 58.6 inches of precipitation a year and 1 inches of snowfall (NOAA 1991–2020 normals, Powers station).

How hot do summers get in Agness, OR?

The average high peaks at 91 °F in August, with about 49 days a year at 90 °F or more.

What kind of soil does 97406 have?

The USDA soil survey maps Brandypeak at the center of ZIP 97406: slightly decomposed plant material, well drained, pH about 4.5 (strongly acidic).

Did spring come early in Agness, OR in 2026?

Spring leaf-out near 97406 came on Feb 2 in 2026, 7 days earlier than the 1991–2020 average (Feb 9), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Agness, OR?

Long-day onions: the longest day near 97406 is 15 h 19 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).