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

Planting zone for 18930 — Kintnersville, PA

ZIP code 18930 (Kintnersville, Bucks 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 16.

Where ZIP 18930 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 16

2012 zone6b

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 6b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Kintnersville, 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 Kintnersville, 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 16median — 10% chance by Oct 4

Growing season170 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 17 and returns around October 28.

From the NOAA station Bucksville, PA — 2 miles away, elevation 387 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 18930

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 21 – Sep 4

GarlicPlant cloves · Oct 2 – Nov 6

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 29) and first fall frost (Oct 16) 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 18930 came on Mar 27 — 4 days earlier than the 1991–2020 average (Mar 31).

average
Mar 312026
Mar 27

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 Kintnersville, PA

The soil mapped at the center of ZIP 18930 is Klinesville — channery silt loam, somewhat excessively drained.

TextureChannery silt loama good balance for most vegetables

pH5.3strongly acidic; most vegetables like 6.0–7.0

DrainageSomewhat excessively drainednatural drainage class

Organic matter1.5%low — add compost

Hydrologic groupDwater soaks in very slowly

Farmland classNot prime farmlandUSDA classification

Map unit: Klinesville very channery silt loam, 15 to 25 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 18930; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Kintnersville, PA

Summer high85 °Faverage high, July

Winter low19 °Faverage low, January

Hot days17days a year at 90 °F or more

Freezing nights139nights a year at 32 °F or less

Growing degree days3,107base 50 °F — the season’s usable heat

Longest day15 h 04 mindaylight on June 21

Shortest day9 h 16 mindaylight on December 21

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

Precipitation51 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: Bucksville, PA (2 mi away); precipitation: Bucksville, PA (2 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

189216b

Ferndale, PA · 2 mi

180777a

Riegelsville, PA · 3 mi

Springtown, PA · 4 mi

189726b

Upper Black Eddy, PA · 5 mi

189426b

Ottsville, PA · 5 mi

189556b

Richlandtown, PA · 6 mi

Pennsylvania planting zones →

Questions about 18930

What planting zone is ZIP code 18930?

ZIP code 18930 (Kintnersville, 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 Kintnersville, PA?

The median last spring frost (32 °F) near 18930 is April 29; after May 15 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Bucksville station.

When is the first frost in Kintnersville, PA?

The median first fall frost near 18930 is October 16, giving a median frost-free growing season of 170 days.

When should I plant tomatoes in 18930?

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 18930 get?

About 51 inches of precipitation a year (NOAA 1991–2020 normals, Bucksville station).

How hot do summers get in Kintnersville, PA?

The average high peaks at 85 °F in July, with about 17 days a year at 90 °F or more.

What kind of soil does 18930 have?

The USDA soil survey maps Klinesville at the center of ZIP 18930: channery silt loam, somewhat excessively drained, pH about 5.3 (strongly acidic).

Did spring come early in Kintnersville, PA in 2026?

Spring leaf-out near 18930 came on Mar 27 in 2026, 4 days earlier than the 1991–2020 average (Mar 31), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Kintnersville, PA?

Long-day onions: the longest day near 18930 is 15 h 04 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).