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

Planting zone for 97911 — Juntura, OR

ZIP code 97911 (Juntura, Malheur County) is in USDA zone 6a: the coldest winter night averages −10 to −5 °F. The median last spring frost is June 5 and the first fall frost September 5.

Where ZIP 97911 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.

Zone6a−10 to −5 °F
Coldest night−23.3 to −20.6 °C
Last frostJun 5
First frostSep 5
2012 zone6a

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 6a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Juntura, 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 Juntura, OR

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostJune 5median — 50% chance of a later frost
Safe for tender plantsJune 26only 10% chance of frost after
First fall frostSeptember 5median — 10% chance by Aug 20
Growing season91 daysfrost-free, median

A hard freeze (28 °F) usually ends around May 18 and returns around September 17.

From the NOAA station Drewsey, OR — 17 miles away, elevation 3,514 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 97911

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Apr 24 – May 8
SpinachSow outdoors · Apr 24 – May 15
Broccoli, cabbageStart indoors · Mar 27 – Apr 10
Broccoli, cabbageTransplant · May 15 – May 29
Onion setsPlant outdoors · May 8 – May 22
PotatoesPlant outdoors · May 15 – May 29
LettuceSow outdoors · May 8 – May 22
Carrots, beetsSow outdoors · May 15 – May 29
TomatoesStart indoors · Apr 10 – Apr 24
TomatoesTransplant · Jun 12 – Jun 26
Peppers, eggplantStart indoors · Mar 27 – Apr 10
Peppers, eggplantTransplant · Jun 19 – Jul 3
BeansSow outdoors · Jun 12 – Jun 26
Sweet cornSow outdoors · Jun 12 – Jun 26
Cucumbers, squashSow outdoors · Jun 12 – Jun 26
Fall lettuce, spinachSow outdoors · Jul 11 – Jul 25
GarlicPlant cloves · Aug 22 – Sep 26
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Jun 5) and first fall frost (Sep 5) 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 97911 came on Mar 21 — 30 days earlier than the 1991–2020 average (Apr 20).

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 6a in Oregon

607 plants native to the lower 48 states, recorded in Oregon, and rated by the USDA to survive −10 °F or colder — the bottom of zone 6a. Each links to its USDA PLANTS profile.

Trees 39

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 113

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 284

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 160

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 Juntura, OR.

Soil in Juntura, OR

The soil mapped at the center of ZIP 97911 is Bocker — very cobbly silt loam, well drained.

TextureVery cobbly silt loama good balance for most vegetables
pH6.4slightly acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter2%moderate
Hydrologic groupDwater soaks in very slowly
Farmland classNot prime farmlandUSDA classification

Map unit: Bocker-Rock outcrop complex, 1 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 97911; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Juntura, OR

Summer high90 °Faverage high, July
Winter low15 °Faverage low, December
Hot days41days a year at 90 °F or more
Freezing nights197nights a year at 32 °F or less
Growing degree days1,897base 50 °F — the season’s usable heat
Longest day15 h 28 mindaylight on June 21
Shortest day8 h 54 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation11.1 inper year, rain and melted snow
Snowfall36 inper year

Average high and low, by month

0°10°20°30°40°50°60°70°80°90°100°32 °FJanuary: average high 35 °F, low 17 °F 35°17° JanFebruary: average high 42 °F, low 20 °F 42°20° FebMarch: average high 52 °F, low 25 °F 52°25° MarApril: average high 60 °F, low 29 °F 60°29° AprMay: average high 70 °F, low 37 °F 70°37° MayJune: average high 78 °F, low 43 °F 78°43° JunJuly: average high 90 °F, low 49 °F 90°49° JulAugust: average high 88 °F, low 46 °F 88°46° AugSeptember: average high 79 °F, low 37 °F 79°37° SepOctober: average high 64 °F, low 27 °F 64°27° OctNovember: average high 46 °F, low 21 °F 46°21° NovDecember: average high 35 °F, low 15 °F 35°15° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″January: 1.52 in precipitation, 10.2 in snowfall 1.5❄10 JanFebruary: 1.03 in precipitation, 7.1 in snowfall 1.0❄7 FebMarch: 1.01 in precipitation, 1.9 in snowfall 1.0❄2 MarApril: 0.90 in precipitation, 0.6 in snowfall 0.9❄1 AprMay: 1.11 in precipitation 1.1 MayJune: 0.90 in precipitation 0.9 JunJuly: 0.37 in precipitation 0.4 JulAugust: 0.28 in precipitation 0.3 AugSeptember: 0.44 in precipitation 0.4 SepOctober: 0.82 in precipitation, 0.1 in snowfall 0.8 OctNovember: 1.17 in precipitation, 3.6 in snowfall 1.2❄4 NovDecember: 1.58 in precipitation, 12.4 in snowfall 1.6❄12 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Drewsey, OR (17 mi away); precipitation: Drewsey, OR (17 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.

979206a
Westfall, OR · 20 mi
979046a
Drewsey, OR · 22 mi
979176a
Riverside, OR · 23 mi
979086a
Ironside, OR · 26 mi
977326a
Crane, OR · 30 mi
979066b
Harper, OR · 31 mi
979036b
Brogan, OR · 35 mi
978846a
Unity, OR · 41 mi

Oregon planting zones →

Questions about 97911

What planting zone is ZIP code 97911?

ZIP code 97911 (Juntura, OR) is in USDA hardiness zone 6a on the 2023 map: the coldest night of an average winter reaches −10 to −5 °F (−23.3 to −20.6 °C).

When is the last frost in Juntura, OR?

The median last spring frost (32 °F) near 97911 is June 5; after June 26 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Drewsey station.

When is the first frost in Juntura, OR?

The median first fall frost near 97911 is September 5, giving a median frost-free growing season of 91 days.

When should I plant tomatoes in 97911?

Start tomato seeds indoors around Apr 10 – Apr 24 and set transplants outside around Jun 12 – Jun 26, one to three weeks after the median last frost.

How much rain and snow does 97911 get?

About 11.1 inches of precipitation a year and 36 inches of snowfall (NOAA 1991–2020 normals, Drewsey station).

How hot do summers get in Juntura, OR?

The average high peaks at 90 °F in July, with about 41 days a year at 90 °F or more.

What kind of soil does 97911 have?

The USDA soil survey maps Bocker at the center of ZIP 97911: very cobbly silt loam, well drained, pH about 6.4 (slightly acidic).

Did spring come early in Juntura, OR in 2026?

Spring leaf-out near 97911 came on Mar 21 in 2026, 30 days earlier than the 1991–2020 average (Apr 20), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Juntura, OR?

Long-day onions: the longest day near 97911 is 15 h 28 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).