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

Planting zone for 97374 — Scio, OR

ZIP code 97374 (Scio, Linn County) is in USDA zone 8b: the coldest winter night averages 15 to 20 °F. The median last spring frost is April 26 and the first fall frost October 24.

Where ZIP 97374 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.

Zone8b15 to 20 °F
Coldest night−9.4 to −6.7 °C
Last frostApr 26
First frostOct 24
2012 zone8b

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 8b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Scio, 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 Scio, OR

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 26median — 50% chance of a later frost
Safe for tender plantsMay 11only 10% chance of frost after
First fall frostOctober 24median — 10% chance by Oct 5
Growing season184 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 24 and returns around November 12.

From the NOAA station Lacomb 3 Nne, OR — 6 miles away, elevation 522 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 97374

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 15 – Mar 29
SpinachSow outdoors · Mar 15 – Apr 5
Broccoli, cabbageStart indoors · Feb 15 – Mar 1
Broccoli, cabbageTransplant · Apr 5 – Apr 19
Onion setsPlant outdoors · Mar 29 – Apr 12
PotatoesPlant outdoors · Apr 5 – Apr 19
LettuceSow outdoors · Mar 29 – Apr 12
Carrots, beetsSow outdoors · Apr 5 – Apr 19
TomatoesStart indoors · Mar 1 – Mar 15
TomatoesTransplant · May 3 – May 17
Peppers, eggplantStart indoors · Feb 15 – Mar 1
Peppers, eggplantTransplant · May 10 – May 24
BeansSow outdoors · May 3 – May 17
Sweet cornSow outdoors · May 3 – May 17
Cucumbers, squashSow outdoors · May 3 – May 17
Fall lettuce, spinachSow outdoors · Aug 29 – Sep 12
GarlicPlant cloves · Oct 10 – Nov 14
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 26) and first fall frost (Oct 24) 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 97374 came on Feb 22 — about the same time as the 1991–2020 average (Feb 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).

Soil in Scio, OR

The soil mapped at the center of ZIP 97374 is Nekia — silty clay loam, well drained.

TextureSilty clay loamholds water and nutrients; slow to drain and warm up
pH5.6moderately acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter5.5%high
Hydrologic groupCwater soaks in slowly
Farmland classFarmland of statewide importanceUSDA classification

Map unit: Nekia silty clay loam, 20 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 97374; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Scio, OR

Summer high82 °Faverage high, August
Winter low33 °Faverage low, January
Hot days13days a year at 90 °F or more
Freezing nights69nights a year at 32 °F or less
Growing degree days1,935base 50 °F — the season’s usable heat
Longest day15 h 35 mindaylight on June 21
Shortest day8 h 48 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation51.3 inper year, rain and melted snow

Average high and low, by month

20°30°40°50°60°70°80°90°32 °FJanuary: average high 47 °F, low 33 °F 47°33° JanFebruary: average high 50 °F, low 34 °F 50°34° FebMarch: average high 55 °F, low 35 °F 55°35° MarApril: average high 60 °F, low 38 °F 60°38° AprMay: average high 67 °F, low 43 °F 67°43° MayJune: average high 72 °F, low 47 °F 72°47° JunJuly: average high 81 °F, low 50 °F 81°50° JulAugust: average high 82 °F, low 49 °F 82°49° AugSeptember: average high 76 °F, low 46 °F 76°46° SepOctober: average high 63 °F, low 41 °F 63°41° OctNovember: average high 52 °F, low 37 °F 52°37° NovDecember: average high 45 °F, low 33 °F 45°33° Dec

Precipitation by month inches

0″2″4″6″8″January: 6.37 in precipitation 6.4 JanFebruary: 5.56 in precipitation 5.6 FebMarch: 6.03 in precipitation 6.0 MarApril: 4.34 in precipitation 4.3 AprMay: 3.66 in precipitation 3.7 MayJune: 2.47 in precipitation 2.5 JunJuly: 0.50 in precipitation 0.5 JulAugust: 0.67 in precipitation 0.7 AugSeptember: 1.88 in precipitation 1.9 SepOctober: 4.67 in precipitation 4.7 OctNovember: 7.13 in precipitation 7.1 NovDecember: 8.04 in precipitation 8.0 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Lacomb 3 Nne, OR (6 mi away); precipitation: Scio 7.3 Sse, OR (6 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 8b.

973358b
Crabtree, OR · 6 mi
973838b
Stayton, OR · 8 mi
973848b
Mehama, OR · 10 mi
973928b
Turner, OR · 10 mi
973258b
Aumsville, OR · 10 mi
973558b
Lebanon, OR · 11 mi
973858b
Sublimity, OR · 12 mi
973228b
Albany, OR · 13 mi

Oregon planting zones →

Questions about 97374

What planting zone is ZIP code 97374?

ZIP code 97374 (Scio, OR) is in USDA hardiness zone 8b on the 2023 map: the coldest night of an average winter reaches 15 to 20 °F (−9.4 to −6.7 °C).

When is the last frost in Scio, OR?

The median last spring frost (32 °F) near 97374 is April 26; after May 11 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Lacomb 3 Nne station.

When is the first frost in Scio, OR?

The median first fall frost near 97374 is October 24, giving a median frost-free growing season of 184 days.

When should I plant tomatoes in 97374?

Start tomato seeds indoors around Mar 1 – Mar 15 and set transplants outside around May 3 – May 17, one to three weeks after the median last frost.

How much rain and snow does 97374 get?

About 51.3 inches of precipitation a year (NOAA 1991–2020 normals, Scio 7.3 Sse station).

How hot do summers get in Scio, OR?

The average high peaks at 82 °F in August, with about 13 days a year at 90 °F or more.

What kind of soil does 97374 have?

The USDA soil survey maps Nekia at the center of ZIP 97374: silty clay loam, well drained, pH about 5.6 (moderately acidic).

Did spring come early in Scio, OR in 2026?

Spring leaf-out near 97374 came on Feb 22 in 2026, about the same as the 1991–2020 average (Feb 20), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Scio, OR?

Long-day onions: the longest day near 97374 is 15 h 35 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).