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

Planting zone for 97476 — Sixes, OR

ZIP code 97476 (Sixes, Curry County) is in USDA zone 9b: the coldest winter night averages 25 to 30 °F. The median last spring frost is March 16 and the first fall frost November 29.

Where ZIP 97476 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.

Zone9b25 to 30 °F
Coldest night−3.9 to −1.1 °C
Last frostMar 16
First frostNov 29
2012 zone9b

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 9b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Sixes, 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 Sixes, OR

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMarch 16median — 50% chance of a later frost
Safe for tender plantsApril 15only 10% chance of frost after
First fall frostNovember 29median — 10% chance by Nov 1
Growing season258 daysfrost-free, median

A hard freeze (28 °F) usually ends around January 29 and returns around December 21.

From the NOAA station Langlois #2, OR — 6 miles away, elevation 89 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 97476

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Feb 2 – Feb 16
SpinachSow outdoors · Feb 2 – Feb 23
Broccoli, cabbageStart indoors · Jan 5 – Jan 19
Broccoli, cabbageTransplant · Feb 23 – Mar 9
Onion setsPlant outdoors · Feb 16 – Mar 2
PotatoesPlant outdoors · Feb 23 – Mar 9
LettuceSow outdoors · Feb 16 – Mar 2
Carrots, beetsSow outdoors · Feb 23 – Mar 9
TomatoesStart indoors · Jan 19 – Feb 2
TomatoesTransplant · Mar 23 – Apr 6
Peppers, eggplantStart indoors · Jan 5 – Jan 19
Peppers, eggplantTransplant · Mar 30 – Apr 13
BeansSow outdoors · Mar 23 – Apr 6
Sweet cornSow outdoors · Mar 23 – Apr 6
Cucumbers, squashSow outdoors · Mar 23 – Apr 6
Fall lettuce, spinachSow outdoors · Oct 4 – Oct 18
GarlicPlant cloves · Nov 15 – Dec 20
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Mar 16) and first fall frost (Nov 29) 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 97476 came on Jan 29 — 5 days earlier than the 1991–2020 average (Feb 3).

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 Sixes, OR

The soil mapped at the center of ZIP 97476 is Deadline — 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: Deadline-Nailkeg complex, cool, 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 97476; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Sixes, OR

Summer high70 °Faverage high, August
Winter low39 °Faverage low, February
Hot days0days a year at 90 °F or more
Freezing nights15nights a year at 32 °F or less
Growing degree days1,611base 50 °F — the season’s usable heat
Longest day15 h 21 mindaylight on June 21
Shortest day9 h 01 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation70.3 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 40 °F 55°40° JanFebruary: average high 55 °F, low 39 °F 55°39° FebMarch: average high 56 °F, low 40 °F 56°40° MarApril: average high 58 °F, low 42 °F 58°42° AprMay: average high 62 °F, low 46 °F 62°46° MayJune: average high 65 °F, low 49 °F 65°49° JunJuly: average high 69 °F, low 52 °F 69°52° JulAugust: average high 70 °F, low 52 °F 70°52° AugSeptember: average high 69 °F, low 49 °F 69°49° SepOctober: average high 65 °F, low 45 °F 65°45° OctNovember: average high 58 °F, low 42 °F 58°42° NovDecember: average high 54 °F, low 39 °F 54°39° Dec

Precipitation by month inches

0″2″4″6″8″10″12″January: 11.83 in precipitation 11.8 JanFebruary: 8.76 in precipitation 8.8 FebMarch: 9.15 in precipitation 9.2 MarApril: 6.97 in precipitation 7.0 AprMay: 3.52 in precipitation 3.5 MayJune: 1.79 in precipitation 1.8 JunJuly: 0.34 in precipitation 0.3 JulAugust: 0.50 in precipitation 0.5 AugSeptember: 1.54 in precipitation 1.5 SepOctober: 4.13 in precipitation 4.1 OctNovember: 9.65 in precipitation 9.7 NovDecember: 12.17 in precipitation 12.2 Dec

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

Nearby ZIP codes

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

974509a
Langlois, OR · 5 mi
974659b
Port Orford, OR · 6 mi
974149a
Broadbent, OR · 15 mi
974119b
Bandon, OR · 15 mi
974669a
Powers, OR · 16 mi
974919b
Wedderburn, OR · 16 mi
974649b
Ophir, OR · 19 mi
974589a
Myrtle Point, OR · 25 mi

Oregon planting zones →

Questions about 97476

What planting zone is ZIP code 97476?

ZIP code 97476 (Sixes, OR) is in USDA hardiness zone 9b on the 2023 map: the coldest night of an average winter reaches 25 to 30 °F (−3.9 to −1.1 °C).

When is the last frost in Sixes, OR?

The median last spring frost (32 °F) near 97476 is March 16; after April 15 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Langlois #2 station.

When is the first frost in Sixes, OR?

The median first fall frost near 97476 is November 29, giving a median frost-free growing season of 258 days.

When should I plant tomatoes in 97476?

Start tomato seeds indoors around Jan 19 – Feb 2 and set transplants outside around Mar 23 – Apr 6, one to three weeks after the median last frost.

How much rain and snow does 97476 get?

About 70.3 inches of precipitation a year (NOAA 1991–2020 normals, Langlois #2 station).

How hot do summers get in Sixes, OR?

The average high peaks at 70 °F in August, with about 0 days a year at 90 °F or more.

What kind of soil does 97476 have?

The USDA soil survey maps Deadline at the center of ZIP 97476: slightly decomposed plant material, well drained, pH about 4.5 (strongly acidic).

Did spring come early in Sixes, OR in 2026?

Spring leaf-out near 97476 came on Jan 29 in 2026, 5 days earlier than the 1991–2020 average (Feb 3), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Sixes, OR?

Long-day onions: the longest day near 97476 is 15 h 21 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).