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

Planting zone for 17307 — Biglerville, PA

ZIP code 17307 (Biglerville, Adams County) is in USDA zone 7a: the coldest winter night averages 0 to 5 °F. The median last spring frost is April 15 and the first fall frost October 27.

Where ZIP 17307 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.

Zone7a0 to 5 °F
Coldest night−17.8 to −15 °C
Last frostApr 15
First frostOct 27
2012 zone6b

Was 6b 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 7a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Biglerville, 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 Biglerville, PA

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 15median — 50% chance of a later frost
Safe for tender plantsMay 4only 10% chance of frost after
First fall frostOctober 27median — 10% chance by Oct 11
Growing season194 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 3 and returns around November 8.

From the NOAA station Biglerville, PA — 4 miles away, elevation 722 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 17307

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 4 – Mar 18
SpinachSow outdoors · Mar 4 – Mar 25
Broccoli, cabbageStart indoors · Feb 4 – Feb 18
Broccoli, cabbageTransplant · Mar 25 – Apr 8
Onion setsPlant outdoors · Mar 18 – Apr 1
PotatoesPlant outdoors · Mar 25 – Apr 8
LettuceSow outdoors · Mar 18 – Apr 1
Carrots, beetsSow outdoors · Mar 25 – Apr 8
TomatoesStart indoors · Feb 18 – Mar 4
TomatoesTransplant · Apr 22 – May 6
Peppers, eggplantStart indoors · Feb 4 – Feb 18
Peppers, eggplantTransplant · Apr 29 – May 13
BeansSow outdoors · Apr 22 – May 6
Sweet cornSow outdoors · Apr 22 – May 6
Cucumbers, squashSow outdoors · Apr 22 – May 6
Fall lettuce, spinachSow outdoors · Sep 1 – Sep 15
GarlicPlant cloves · Oct 13 – Nov 17
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 15) and first fall frost (Oct 27) 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 17307 came on Mar 22 — 9 days earlier than the 1991–2020 average (Mar 31).

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 Biglerville, PA

The soil mapped at the center of ZIP 17307 is Highfield — channery silt loam, well drained.

TextureChannery silt loama good balance for most vegetables
pH5.4strongly acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter2%moderate
Hydrologic groupBwater soaks in moderately
Farmland classprime farmlandUSDA classification

Map unit: Highfield channery silt loam, 3 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 17307; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Biglerville, PA

Summer high86 °Faverage high, July
Winter low22 °Faverage low, January
Hot days21days a year at 90 °F or more
Freezing nights115nights a year at 32 °F or less
Growing degree days3,368base 50 °F — the season’s usable heat
Longest day15 h 01 mindaylight on June 21
Shortest day9 h 20 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation45.7 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 38 °F, low 22 °F 38°22° JanFebruary: average high 41 °F, low 23 °F 41°23° FebMarch: average high 50 °F, low 30 °F 50°30° MarApril: average high 62 °F, low 41 °F 62°41° AprMay: average high 72 °F, low 51 °F 72°51° MayJune: average high 81 °F, low 60 °F 81°60° JunJuly: average high 86 °F, low 65 °F 86°65° JulAugust: average high 84 °F, low 63 °F 84°63° AugSeptember: average high 77 °F, low 56 °F 77°56° SepOctober: average high 65 °F, low 44 °F 65°44° OctNovember: average high 53 °F, low 35 °F 53°35° NovDecember: average high 43 °F, low 27 °F 43°27° Dec

Precipitation by month inches

0″1″2″3″4″5″January: 3.27 in precipitation 3.3 JanFebruary: 2.77 in precipitation 2.8 FebMarch: 3.83 in precipitation 3.8 MarApril: 3.84 in precipitation 3.8 AprMay: 4.63 in precipitation 4.6 MayJune: 4.19 in precipitation 4.2 JunJuly: 3.87 in precipitation 3.9 JulAugust: 3.85 in precipitation 3.9 AugSeptember: 4.82 in precipitation 4.8 SepOctober: 3.91 in precipitation 3.9 OctNovember: 3.18 in precipitation 3.2 NovDecember: 3.53 in precipitation 3.5 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Biglerville, PA (4 mi away); precipitation: Biglerville 3.0 Wsw, PA (2 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 7a.

173037a
Arendtsville, PA · 2 mi
173067a
Bendersville, PA · 4 mi
173047a
Aspers, PA · 5 mi
173107a
Cashtown, PA · 5 mi
173437a
Mc Knightstown, PA · 6 mi
173537a
Orrtanna, PA · 6 mi
173247a
Gardners, PA · 7 mi
173757a
Peach Glen, PA · 7 mi

Pennsylvania planting zones →

Questions about 17307

What planting zone is ZIP code 17307?

ZIP code 17307 (Biglerville, PA) is in USDA hardiness zone 7a on the 2023 map: the coldest night of an average winter reaches 0 to 5 °F (−17.8 to −15 °C).

When is the last frost in Biglerville, PA?

The median last spring frost (32 °F) near 17307 is April 15; after May 4 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Biglerville station.

When is the first frost in Biglerville, PA?

The median first fall frost near 17307 is October 27, giving a median frost-free growing season of 194 days.

When should I plant tomatoes in 17307?

Start tomato seeds indoors around Feb 18 – Mar 4 and set transplants outside around Apr 22 – May 6, one to three weeks after the median last frost.

How much rain and snow does 17307 get?

About 45.7 inches of precipitation a year (NOAA 1991–2020 normals, Biglerville 3.0 Wsw station).

How hot do summers get in Biglerville, PA?

The average high peaks at 86 °F in July, with about 21 days a year at 90 °F or more.

What kind of soil does 17307 have?

The USDA soil survey maps Highfield at the center of ZIP 17307: channery silt loam, well drained, pH about 5.4 (strongly acidic).

Did spring come early in Biglerville, PA in 2026?

Spring leaf-out near 17307 came on Mar 22 in 2026, 9 days earlier than the 1991–2020 average (Mar 31), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Biglerville, PA?

Long-day onions: the longest day near 17307 is 15 h 01 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 17307 change?

Yes. The 2012 USDA map put 17307 in zone 6b; the 2023 map puts it in zone 7a. The newer map uses 1991–2020 data and more weather stations.