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

Planting zone for 97751 — Paulina, OR

ZIP code 97751 (Paulina, Crook County) is in USDA zone 6a: the coldest winter night averages −10 to −5 °F. The median last spring frost is June 2 and the first fall frost September 17.

Where ZIP 97751 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 2
First frostSep 17
2012 zone5b

Was 5b 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 6a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Paulina, 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 Paulina, OR

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostJune 2median — 50% chance of a later frost
Safe for tender plantsJune 25only 10% chance of frost after
First fall frostSeptember 17median — 10% chance by Aug 30
Growing season104 daysfrost-free, median

A hard freeze (28 °F) usually ends around May 12 and returns around September 30.

From the NOAA station Barnes Stn, OR — 25 miles away, elevation 3,970 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 97751

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Apr 21 – May 5
SpinachSow outdoors · Apr 21 – May 12
Broccoli, cabbageStart indoors · Mar 24 – Apr 7
Broccoli, cabbageTransplant · May 12 – May 26
Onion setsPlant outdoors · May 5 – May 19
PotatoesPlant outdoors · May 12 – May 26
LettuceSow outdoors · May 5 – May 19
Carrots, beetsSow outdoors · May 12 – May 26
TomatoesStart indoors · Apr 7 – Apr 21
TomatoesTransplant · Jun 9 – Jun 23
Peppers, eggplantStart indoors · Mar 24 – Apr 7
Peppers, eggplantTransplant · Jun 16 – Jun 30
BeansSow outdoors · Jun 9 – Jun 23
Sweet cornSow outdoors · Jun 9 – Jun 23
Cucumbers, squashSow outdoors · Jun 9 – Jun 23
Fall lettuce, spinachSow outdoors · Jul 23 – Aug 6
GarlicPlant cloves · Sep 3 – Oct 8
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Jun 2) and first fall frost (Sep 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 97751 came on Mar 23 — 18 days earlier than the 1991–2020 average (Apr 10).

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 Paulina, OR

The soil mapped at the center of ZIP 97751 is Booth — ashy sandy loam, well drained.

TextureAshy sandy loamdrains and warms fast; dries out and needs more feeding
pH7.0neutral; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter2.5%moderate
Hydrologic groupDwater soaks in very slowly
Farmland classFarmland of statewide importanceUSDA classification

Map unit: Booth-Powellbutte complex, 0 to 12 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 97751; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Paulina, OR

Summer high89 °Faverage high, July
Winter low18 °Faverage low, December
Hot days35days a year at 90 °F or more
Freezing nights214nights a year at 32 °F or less
Growing degree days1,627base 50 °F — the season’s usable heat
Longest day15 h 30 mindaylight on June 21
Shortest day8 h 52 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation13.6 inper year, rain and melted snow

Average high and low, by month

10°20°30°40°50°60°70°80°90°100°32 °FJanuary: average high 41 °F, low 21 °F 41°21° JanFebruary: average high 46 °F, low 22 °F 46°22° FebMarch: average high 54 °F, low 25 °F 54°25° MarApril: average high 61 °F, low 28 °F 61°28° AprMay: average high 69 °F, low 36 °F 69°36° MayJune: average high 78 °F, low 39 °F 78°39° JunJuly: average high 89 °F, low 45 °F 89°45° JulAugust: average high 87 °F, low 42 °F 87°42° AugSeptember: average high 79 °F, low 35 °F 79°35° SepOctober: average high 66 °F, low 27 °F 66°27° OctNovember: average high 50 °F, low 22 °F 50°22° NovDecember: average high 40 °F, low 18 °F 40°18° Dec

Precipitation by month inches

0″1″2″January: 1.64 in precipitation 1.6 JanFebruary: 1.07 in precipitation 1.1 FebMarch: 1.12 in precipitation 1.1 MarApril: 1.47 in precipitation 1.5 AprMay: 1.76 in precipitation 1.8 MayJune: 1.34 in precipitation 1.3 JunJuly: 0.34 in precipitation 0.3 JulAugust: 0.37 in precipitation 0.4 AugSeptember: 0.44 in precipitation 0.4 SepOctober: 1.01 in precipitation 1.0 OctNovember: 1.31 in precipitation 1.3 NovDecember: 1.72 in precipitation 1.7 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Paulina, OR (11 mi away); precipitation: Paulina 6.0 Ese, OR (4 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.

977526a
Post, OR · 21 mi
978257a
Dayville, OR · 22 mi
978206b
Canyon City, OR · 29 mi
977546b
Prineville, OR · 36 mi
978656b
Mount Vernon, OR · 37 mi
977126a
Brothers, OR · 40 mi
978487a
Kimberly, OR · 42 mi
978747a
Spray, OR · 43 mi

Oregon planting zones →

Questions about 97751

What planting zone is ZIP code 97751?

ZIP code 97751 (Paulina, 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 Paulina, OR?

The median last spring frost (32 °F) near 97751 is June 2; after June 25 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Barnes Stn station.

When is the first frost in Paulina, OR?

The median first fall frost near 97751 is September 17, giving a median frost-free growing season of 104 days.

When should I plant tomatoes in 97751?

Start tomato seeds indoors around Apr 7 – Apr 21 and set transplants outside around Jun 9 – Jun 23, one to three weeks after the median last frost.

How much rain and snow does 97751 get?

About 13.6 inches of precipitation a year (NOAA 1991–2020 normals, Paulina 6.0 Ese station).

How hot do summers get in Paulina, OR?

The average high peaks at 89 °F in July, with about 35 days a year at 90 °F or more.

What kind of soil does 97751 have?

The USDA soil survey maps Booth at the center of ZIP 97751: ashy sandy loam, well drained, pH about 7.0 (neutral).

Did spring come early in Paulina, OR in 2026?

Spring leaf-out near 97751 came on Mar 23 in 2026, 18 days earlier than the 1991–2020 average (Apr 10), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Paulina, OR?

Long-day onions: the longest day near 97751 is 15 h 30 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 97751 change?

Yes. The 2012 USDA map put 97751 in zone 5b; the 2023 map puts it in zone 6a. The newer map uses 1991–2020 data and more weather stations.