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

Planting zone for 17771 — Trout Run, PA

ZIP code 17771 (Trout Run, Lycoming County) is in USDA zone 6a: the coldest winter night averages −10 to −5 °F. The median last spring frost is April 25 and the first fall frost October 24.

Where ZIP 17771 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 frostApr 25

First frostOct 24

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 Trout Run, 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 Trout Run, PA

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostApril 25median — 50% chance of a later frost

Safe for tender plantsMay 12only 10% chance of frost after

First fall frostOctober 24median — 10% chance by Oct 8

Growing season181 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 10 and returns around November 4.

From the NOAA station Williamsport 2, PA — 13 miles away, elevation 525 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 17771

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Mar 14 – Mar 28

SpinachSow outdoors · Mar 14 – Apr 4

Broccoli, cabbageStart indoors · Feb 14 – Feb 28

Broccoli, cabbageTransplant · Apr 4 – Apr 18

Onion setsPlant outdoors · Mar 28 – Apr 11

PotatoesPlant outdoors · Apr 4 – Apr 18

LettuceSow outdoors · Mar 28 – Apr 11

Carrots, beetsSow outdoors · Apr 4 – Apr 18

TomatoesStart indoors · Feb 28 – Mar 14

TomatoesTransplant · May 2 – May 16

Peppers, eggplantStart indoors · Feb 14 – Feb 28

Peppers, eggplantTransplant · May 9 – May 23

BeansSow outdoors · May 2 – May 16

Sweet cornSow outdoors · May 2 – May 16

Cucumbers, squashSow outdoors · May 2 – May 16

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 25) 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 17771 came on Apr 3 — 9 days earlier than the 1991–2020 average (Apr 12).

average
Apr 122026
Apr 3

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 Trout Run, PA

The soil mapped at the center of ZIP 17771 is Dekalb — very channery loam, well drained.

TextureVery channery loama good balance for most vegetables

pH5.1strongly acidic; 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: Dekalb very stony sandy loam, 0 to 8 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 17771; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Trout Run, PA

Summer high86 °Faverage high, July

Winter low21 °Faverage low, January

Hot days25days a year at 90 °F or more

Freezing nights118nights a year at 32 °F or less

Growing degree days3,226base 50 °F — the season’s usable heat

Longest day15 h 11 mindaylight on June 21

Shortest day9 h 10 mindaylight on December 21

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

Precipitation43.6 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: Williamsport 2, PA (13 mi away); precipitation: Williamsport 2.0 Ne, PA (12 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.

177056b

Williamsport, PA · 7 mi

177286a

Cogan Station, PA · 7 mi

177636a

Ralston, PA · 8 mi

177656a

Roaring Branch, PA · 10 mi

177016a

Williamsport, PA · 11 mi

169306a

Liberty, PA · 11 mi

177546b

Montoursville, PA · 12 mi

177766a

Waterville, PA · 13 mi

Pennsylvania planting zones →

Questions about 17771

What planting zone is ZIP code 17771?

ZIP code 17771 (Trout Run, PA) 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 Trout Run, PA?

The median last spring frost (32 °F) near 17771 is April 25; after May 12 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Williamsport 2 station.

When is the first frost in Trout Run, PA?

The median first fall frost near 17771 is October 24, giving a median frost-free growing season of 181 days.

When should I plant tomatoes in 17771?

Start tomato seeds indoors around Feb 28 – Mar 14 and set transplants outside around May 2 – May 16, one to three weeks after the median last frost.

How much rain and snow does 17771 get?

About 43.6 inches of precipitation a year (NOAA 1991–2020 normals, Williamsport 2.0 Ne station).

How hot do summers get in Trout Run, PA?

The average high peaks at 86 °F in July, with about 25 days a year at 90 °F or more.

What kind of soil does 17771 have?

The USDA soil survey maps Dekalb at the center of ZIP 17771: very channery loam, well drained, pH about 5.1 (strongly acidic).

Did spring come early in Trout Run, PA in 2026?

Spring leaf-out near 17771 came on Apr 3 in 2026, 9 days earlier than the 1991–2020 average (Apr 12), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Trout Run, PA?

Long-day onions: the longest day near 17771 is 15 h 11 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).