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

Planting zone for 17019 — Dillsburg, PA

ZIP code 17019 (Dillsburg, York County) is in USDA zone 7a: the coldest winter night averages 0 to 5 °F. The median last spring frost is April 9 and the first fall frost November 1.

Where ZIP 17019 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 9
First frostNov 1
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 Dillsburg, 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 Dillsburg, PA

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 9median — 50% chance of a later frost
Safe for tender plantsApril 25only 10% chance of frost after
First fall frostNovember 1median — 10% chance by Oct 16
Growing season205 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 29 and returns around November 12.

From the NOAA station Harrisburg Cptl Cy Airport, PA — 12 miles away, elevation 341 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 17019

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Feb 26 – Mar 12
SpinachSow outdoors · Feb 26 – Mar 19
Broccoli, cabbageStart indoors · Jan 29 – Feb 12
Broccoli, cabbageTransplant · Mar 19 – Apr 2
Onion setsPlant outdoors · Mar 12 – Mar 26
PotatoesPlant outdoors · Mar 19 – Apr 2
LettuceSow outdoors · Mar 12 – Mar 26
Carrots, beetsSow outdoors · Mar 19 – Apr 2
TomatoesStart indoors · Feb 12 – Feb 26
TomatoesTransplant · Apr 16 – Apr 30
Peppers, eggplantStart indoors · Jan 29 – Feb 12
Peppers, eggplantTransplant · Apr 23 – May 7
BeansSow outdoors · Apr 16 – Apr 30
Sweet cornSow outdoors · Apr 16 – Apr 30
Cucumbers, squashSow outdoors · Apr 16 – Apr 30
Fall lettuce, spinachSow outdoors · Sep 6 – Sep 20
GarlicPlant cloves · Oct 18 – Nov 22
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 9) and first fall frost (Nov 1) 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 17019 came on Mar 21 — 9 days earlier than the 1991–2020 average (Mar 30).

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 Dillsburg, PA

The soil mapped at the center of ZIP 17019 is Mount Lucas — silt loam, moderately well drained.

TextureSilt loama good balance for most vegetables
pH6.0slightly acidic; most vegetables like 6.0–7.0
DrainageModerately well drainednatural drainage class
Organic matter1.5%low — add compost
Hydrologic groupCwater soaks in slowly
Farmland classprime farmlandUSDA classification

Map unit: Mount Lucas 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 17019; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Dillsburg, PA

Summer high88 °Faverage high, July
Winter low25 °Faverage low, January
Hot days26days a year at 90 °F or more
Freezing nights102nights a year at 32 °F or less
Growing degree days3,840base 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)
Precipitation46.6 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 40 °F, low 25 °F 40°25° JanFebruary: average high 43 °F, low 26 °F 43°26° FebMarch: average high 53 °F, low 34 °F 53°34° MarApril: average high 65 °F, low 43 °F 65°43° AprMay: average high 75 °F, low 53 °F 75°53° MayJune: average high 83 °F, low 63 °F 83°63° JunJuly: average high 88 °F, low 67 °F 88°67° JulAugust: average high 85 °F, low 66 °F 85°66° AugSeptember: average high 79 °F, low 58 °F 79°58° SepOctober: average high 67 °F, low 47 °F 67°47° OctNovember: average high 55 °F, low 37 °F 55°37° NovDecember: average high 44 °F, low 30 °F 44°30° Dec

Precipitation by month inches

0″1″2″3″4″5″6″January: 3.45 in precipitation 3.5 JanFebruary: 2.71 in precipitation 2.7 FebMarch: 3.97 in precipitation 4.0 MarApril: 3.80 in precipitation 3.8 AprMay: 4.28 in precipitation 4.3 MayJune: 4.15 in precipitation 4.2 JunJuly: 4.32 in precipitation 4.3 JulAugust: 3.99 in precipitation 4.0 AugSeptember: 5.21 in precipitation 5.2 SepOctober: 4.01 in precipitation 4.0 OctNovember: 3.22 in precipitation 3.2 NovDecember: 3.54 in precipitation 3.5 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Harrisburg Cptl Cy Airport, PA (12 mi away); precipitation: York Springs 0.7 Se, PA (8 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 7a.

173237a
Franklintown, PA · 1 mi
170277a
Grantham, PA · 5 mi
173657a
Wellsville, PA · 5 mi
170557a
Mechanicsburg, PA · 6 mi
170077a
Boiling Springs, PA · 6 mi
173397a
Lewisberry, PA · 8 mi
173727a
York Springs, PA · 8 mi
173167a
East Berlin, PA · 9 mi

Pennsylvania planting zones →

Questions about 17019

What planting zone is ZIP code 17019?

ZIP code 17019 (Dillsburg, 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 Dillsburg, PA?

The median last spring frost (32 °F) near 17019 is April 9; after April 25 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Harrisburg Cptl Cy Airport station.

When is the first frost in Dillsburg, PA?

The median first fall frost near 17019 is November 1, giving a median frost-free growing season of 205 days.

When should I plant tomatoes in 17019?

Start tomato seeds indoors around Feb 12 – Feb 26 and set transplants outside around Apr 16 – Apr 30, one to three weeks after the median last frost.

How much rain and snow does 17019 get?

About 46.6 inches of precipitation a year (NOAA 1991–2020 normals, York Springs 0.7 Se station).

How hot do summers get in Dillsburg, PA?

The average high peaks at 88 °F in July, with about 26 days a year at 90 °F or more.

What kind of soil does 17019 have?

The USDA soil survey maps Mount Lucas at the center of ZIP 17019: silt loam, moderately well drained, pH about 6.0 (slightly acidic).

Did spring come early in Dillsburg, PA in 2026?

Spring leaf-out near 17019 came on Mar 21 in 2026, 9 days earlier than the 1991–2020 average (Mar 30), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Dillsburg, PA?

Long-day onions: the longest day near 17019 is 15 h 02 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 17019 change?

Yes. The 2012 USDA map put 17019 in zone 6b; the 2023 map puts it in zone 7a. The newer map uses 1991–2020 data and more weather stations.