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

Planting zone for 15054 — Langeloth, PA

ZIP code 15054 (Langeloth, Washington County) is in USDA zone 6b: the coldest winter night averages −5 to 0 °F. The median last spring frost is April 29 and the first fall frost October 20.

Where ZIP 15054 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 29
First frostOct 20
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 Langeloth, 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 Langeloth, PA

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 29median — 50% chance of a later frost
Safe for tender plantsMay 15only 10% chance of frost after
First fall frostOctober 20median — 10% chance by Oct 6
Growing season175 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 18 and returns around October 31.

From the NOAA station Steubenville, OH — 12 miles away, elevation 991 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 15054

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 18 – Apr 1
SpinachSow outdoors · Mar 18 – Apr 8
Broccoli, cabbageStart indoors · Feb 18 – Mar 4
Broccoli, cabbageTransplant · Apr 8 – Apr 22
Onion setsPlant outdoors · Apr 1 – Apr 15
PotatoesPlant outdoors · Apr 8 – Apr 22
LettuceSow outdoors · Apr 1 – Apr 15
Carrots, beetsSow outdoors · Apr 8 – Apr 22
TomatoesStart indoors · Mar 4 – Mar 18
TomatoesTransplant · May 6 – May 20
Peppers, eggplantStart indoors · Feb 18 – Mar 4
Peppers, eggplantTransplant · May 13 – May 27
BeansSow outdoors · May 6 – May 20
Sweet cornSow outdoors · May 6 – May 20
Cucumbers, squashSow outdoors · May 6 – May 20
Fall lettuce, spinachSow outdoors · Aug 25 – Sep 8
GarlicPlant cloves · Oct 6 – Nov 10
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 29) and first fall frost (Oct 20) 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 15054 came on Mar 10 — 19 days earlier than the 1991–2020 average (Mar 29).

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.

Trees 76

American basswood100 ft · blooms late spring · low shade tolerance · to −46 °FAmerican beech80 ft · blooms mid spring · low shade tolerance · to −44 °FAmerican chestnut115 ft · blooms early summer · high shade tolerance · to −33 °FAmerican elm120 ft · blooms early spring · medium shade tolerance · to −46 °FAmerican sycamore100 ft · blooms spring · medium shade tolerance · to −34 °Farborvitae50 ft · blooms mid spring · medium shade tolerance · to −33 °F

Shrubs 122

alderleaf buckthorn3 ft · blooms late spring · low shade tolerance · to −33 °FAllegheny serviceberry35 ft · blooms early spring · low shade tolerance · to −38 °Falternateleaf dogwood25 ft · blooms mid spring · low shade tolerance · to −47 °FAmerican black currant3 ft · blooms early spring · to −46 °FAmerican hazelnut10 ft · blooms spring · medium shade tolerance · to −33 °FAmerican holly40 ft · blooms mid spring · low shade tolerance · to −20 °F

Wildflowers & perennials 209

alkali buttercup1 ft · blooms late spring · low shade tolerance · to −38 °FAmerican bur-reed3 ft · blooms indeterminate · medium shade tolerance · to −33 °FAmerican eelgrass1 ft · blooms mid summer · high shade tolerance · to −33 °FAmerican licorice4 ft · blooms late spring · medium shade tolerance · to −38 °FAmerican lotus3 ft · blooms mid summer · high shade tolerance · to −36 °FAmerican pokeweed7 ft · blooms mid summer · low shade tolerance · to −33 °F

Grasses 173

American beachgrass2.5 ft · blooms spring · high shade tolerance · to −28 °Farctic brome3 ft · blooms early summer · low shade tolerance · to −33 °FAtlantic mannagrass3 ft · blooms summer · low shade tolerance · to −8 °Fautumn bluegrass1.5 ft · blooms late spring · medium shade tolerance · to −8 °Fawlfruit sedge4 ft · blooms mid spring · low shade tolerance · to −38 °FBailey's sedge2.1 ft · blooms late spring · low shade tolerance · to −33 °F

Vines 10

American bittersweet15 ft · blooms spring · low shade tolerance · to −38 °Fdevil's darning needles15 ft · blooms mid summer · medium shade tolerance · to −38 °Ffrost grape83 ft · blooms late spring · medium shade tolerance · to −23 °Fgraybark grape50 ft · blooms late spring · medium shade tolerance · to −8 °Friverbank grape45 ft · blooms late spring · medium shade tolerance · to −33 °Fsummer grape30 ft · blooms late spring · low shade tolerance · to −23 °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 Langeloth, PA.

Soil in Langeloth, PA

The soil mapped at the center of ZIP 15054 is Udorthents — very channery silt loam, well drained.

TextureVery channery silt loama good balance for most vegetables
pH6.5neutral; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter3%moderate
Hydrologic groupAwater soaks in fast
Farmland classNot prime farmlandUSDA classification

Map unit: Udorthents, smoothed, gently sloping.

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 15054; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Langeloth, PA

Summer high83 °Faverage high, July
Winter low19 °Faverage low, January
Hot days11days a year at 90 °F or more
Freezing nights116nights a year at 32 °F or less
Growing degree days3,047base 50 °F — the season’s usable heat
Longest day15 h 03 mindaylight on June 21
Shortest day9 h 17 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation43.2 inper year, rain and melted snow

Average high and low, by month

10°20°30°40°50°60°70°80°90°32 °FJanuary: average high 37 °F, low 19 °F 37°19° JanFebruary: average high 40 °F, low 21 °F 40°21° FebMarch: average high 49 °F, low 27 °F 49°27° MarApril: average high 62 °F, low 38 °F 62°38° AprMay: average high 72 °F, low 49 °F 72°49° MayJune: average high 79 °F, low 58 °F 79°58° JunJuly: average high 83 °F, low 63 °F 83°63° JulAugust: average high 82 °F, low 61 °F 82°61° AugSeptember: average high 76 °F, low 54 °F 76°54° SepOctober: average high 64 °F, low 42 °F 64°42° OctNovember: average high 51 °F, low 32 °F 51°32° NovDecember: average high 41 °F, low 25 °F 41°25° Dec

Precipitation by month inches

0″1″2″3″4″5″January: 3.46 in precipitation 3.5 JanFebruary: 2.51 in precipitation 2.5 FebMarch: 3.24 in precipitation 3.2 MarApril: 3.65 in precipitation 3.6 AprMay: 4.29 in precipitation 4.3 MayJune: 4.90 in precipitation 4.9 JunJuly: 4.02 in precipitation 4.0 JulAugust: 3.54 in precipitation 3.5 AugSeptember: 3.81 in precipitation 3.8 SepOctober: 3.42 in precipitation 3.4 OctNovember: 3.17 in precipitation 3.2 NovDecember: 3.15 in precipitation 3.1 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Steubenville, OH (12 mi away); precipitation: Steubenville, OH (12 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 6b.

150786b
Slovan, PA · <1 mi
150046b
Atlasburg, PA · 2 mi
150216b
Burgettstown, PA · 3 mi
150196b
Bulger, PA · 5 mi
150606b
Midway, PA · 6 mi
153406b
Hickory, PA · 7 mi
153616b
Southview, PA · 7 mi
153126b
Avella, PA · 8 mi

Pennsylvania planting zones →

Questions about 15054

What planting zone is ZIP code 15054?

ZIP code 15054 (Langeloth, 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 Langeloth, PA?

The median last spring frost (32 °F) near 15054 is April 29; after May 15 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Steubenville station.

When is the first frost in Langeloth, PA?

The median first fall frost near 15054 is October 20, giving a median frost-free growing season of 175 days.

When should I plant tomatoes in 15054?

Start tomato seeds indoors around Mar 4 – Mar 18 and set transplants outside around May 6 – May 20, one to three weeks after the median last frost.

How much rain and snow does 15054 get?

About 43.2 inches of precipitation a year (NOAA 1991–2020 normals, Steubenville station).

How hot do summers get in Langeloth, PA?

The average high peaks at 83 °F in July, with about 11 days a year at 90 °F or more.

What kind of soil does 15054 have?

The USDA soil survey maps Udorthents at the center of ZIP 15054: very channery silt loam, well drained, pH about 6.5 (neutral).

Did spring come early in Langeloth, PA in 2026?

Spring leaf-out near 15054 came on Mar 10 in 2026, 19 days earlier than the 1991–2020 average (Mar 29), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Langeloth, PA?

Long-day onions: the longest day near 15054 is 15 h 03 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 15054 change?

Yes. The 2012 USDA map put 15054 in zone 6a; the 2023 map puts it in zone 6b. The newer map uses 1991–2020 data and more weather stations.