Data: 2023 USDA zones (PRISM/OSU) · NOAA 1991–2020 normals · updated Oct 29, 2026

Planting zone for 15323 — Claysville, PA

ZIP code 15323 (Claysville, Washington County) is in USDA zone 6b: the coldest winter night averages −5 to 0 °F. The median last spring frost is April 23 and the first fall frost October 25.

Where ZIP 15323 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.

Zone6b−5 to 0 °F

Coldest night−20.6 to −17.8 °C

Last frostApr 23

First frostOct 25

2012 zone6a

Was 6a 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 6b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Claysville, PA…

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 Claysville, PA

JanFebMarAprMayJunJulAugSepOctNovDec

Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free

Last spring frostApril 23median — 50% chance of a later frost

Safe for tender plantsMay 10only 10% chance of frost after

First fall frostOctober 25median — 10% chance by Oct 10

Growing season185 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 8 and returns around November 5.

From the NOAA station Wheeling Ohio Co. Airport, WV — 13 miles away, elevation 1,178 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 15323

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Mar 12 – Mar 26

SpinachSow outdoors · Mar 12 – Apr 2

Broccoli, cabbageStart indoors · Feb 12 – Feb 26

Broccoli, cabbageTransplant · Apr 2 – Apr 16

Onion setsPlant outdoors · Mar 26 – Apr 9

PotatoesPlant outdoors · Apr 2 – Apr 16

LettuceSow outdoors · Mar 26 – Apr 9

Carrots, beetsSow outdoors · Apr 2 – Apr 16

TomatoesStart indoors · Feb 26 – Mar 12

TomatoesTransplant · Apr 30 – May 14

Peppers, eggplantStart indoors · Feb 12 – Feb 26

Peppers, eggplantTransplant · May 7 – May 21

BeansSow outdoors · Apr 30 – May 14

Sweet cornSow outdoors · Apr 30 – May 14

Cucumbers, squashSow outdoors · Apr 30 – May 14

Fall lettuce, spinachSow outdoors · Aug 30 – Sep 13

GarlicPlant cloves · Oct 11 – Nov 15

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 23) and first fall frost (Oct 25) 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 15323 came on Mar 10 — 20 days earlier than the 1991–2020 average (Mar 30).

average
Mar 302026
Mar 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).

Native plants for zone 6b in Pennsylvania

605 plants native to the lower 48 states, recorded in Pennsylvania, and rated by the USDA to survive −5 °F or colder — the bottom of zone 6b. Each links to its USDA PLANTS profile.

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 Claysville, PA.

Soil in Claysville, PA

The soil mapped at the center of ZIP 15323 is Fluvaquents — silt loam, poorly drained.

TextureSilt loama good balance for most vegetables

pH5.5moderately acidic; most vegetables like 6.0–7.0

DrainagePoorly drainedconsider raised beds

Organic matter2.5%moderate

Hydrologic groupB/Dmoderate when drained; wet otherwise

Farmland classNot prime farmlandUSDA classification

Map unit: Fluvaquents, loamy.

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 15323; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Claysville, PA

Summer high83 °Faverage high, July

Winter low22 °Faverage low, January

Hot days8days a year at 90 °F or more

Freezing nights108nights a year at 32 °F or less

Growing degree days3,229base 50 °F — the season’s usable heat

Longest day15 h 02 mindaylight on June 21

Shortest day9 h 19 mindaylight on December 21

Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)

Precipitation37.5 inper year, rain and melted snow

Average high and low, by month

Precipitation by month inches

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Wheeling Ohio Co. Airport, WV (13 mi away); precipitation: Wheeling Ohio Co. Airport, WV (13 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

153766b

West Alexander, PA · 3 mi

153656b

Taylorstown, PA · 4 mi

260606b

Valley Grove, WV · 7 mi

153776b

West Finley, PA · 8 mi

153296a

Prosperity, PA · 9 mi

260326b

Bethany, WV · 9 mi

153796b

West Middletown, PA · 10 mi

153016b

Washington, PA · 10 mi

Pennsylvania planting zones →

Questions about 15323

What planting zone is ZIP code 15323?

ZIP code 15323 (Claysville, PA) is in USDA hardiness zone 6b on the 2023 map: the coldest night of an average winter reaches −5 to 0 °F (−20.6 to −17.8 °C).

When is the last frost in Claysville, PA?

The median last spring frost (32 °F) near 15323 is April 23; after May 10 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Wheeling Ohio Co. Airport station.

When is the first frost in Claysville, PA?

The median first fall frost near 15323 is October 25, giving a median frost-free growing season of 185 days.

When should I plant tomatoes in 15323?

Start tomato seeds indoors around Feb 26 – Mar 12 and set transplants outside around Apr 30 – May 14, one to three weeks after the median last frost.

How much rain and snow does 15323 get?

About 37.5 inches of precipitation a year (NOAA 1991–2020 normals, Wheeling Ohio Co. Airport station).

How hot do summers get in Claysville, PA?

The average high peaks at 83 °F in July, with about 8 days a year at 90 °F or more.

What kind of soil does 15323 have?

The USDA soil survey maps Fluvaquents at the center of ZIP 15323: silt loam, poorly drained, pH about 5.5 (moderately acidic).

Did spring come early in Claysville, PA in 2026?

Spring leaf-out near 15323 came on Mar 10 in 2026, 20 days earlier than the 1991–2020 average (Mar 30), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Claysville, PA?

Long-day onions: the longest day near 15323 is 15 h 02 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 15323 change?

Yes. The 2012 USDA map put 15323 in zone 6a; the 2023 map puts it in zone 6b. The newer map uses 1991–2020 data and more weather stations.