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

Planting zone for 19360 — New London, PA

ZIP code 19360 (New London, Chester County) is in USDA zone 7a: the coldest winter night averages 0 to 5 °F. The median last spring frost is April 7 and the first fall frost November 2.

Where ZIP 19360 is

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 7
First frostNov 2
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 New London, 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 New London, PA

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 7median — 50% chance of a later frost
Safe for tender plantsApril 21only 10% chance of frost after
First fall frostNovember 2median — 10% chance by Oct 19
Growing season208 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 27 and returns around November 13.

From the NOAA station Newark Ag Farm, DE — 4 miles away, elevation 105 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 19360

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Feb 24 – Mar 10
SpinachSow outdoors · Feb 24 – Mar 17
Broccoli, cabbageStart indoors · Jan 27 – Feb 10
Broccoli, cabbageTransplant · Mar 17 – Mar 31
Onion setsPlant outdoors · Mar 10 – Mar 24
PotatoesPlant outdoors · Mar 17 – Mar 31
LettuceSow outdoors · Mar 10 – Mar 24
Carrots, beetsSow outdoors · Mar 17 – Mar 31
TomatoesStart indoors · Feb 10 – Feb 24
TomatoesTransplant · Apr 14 – Apr 28
Peppers, eggplantStart indoors · Jan 27 – Feb 10
Peppers, eggplantTransplant · Apr 21 – May 5
BeansSow outdoors · Apr 14 – Apr 28
Sweet cornSow outdoors · Apr 14 – Apr 28
Cucumbers, squashSow outdoors · Apr 14 – Apr 28
Fall lettuce, spinachSow outdoors · Sep 7 – Sep 21
GarlicPlant cloves · Oct 19 – Nov 23
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 7) and first fall frost (Nov 2) 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 19360 came on Mar 22 — about the same time as the 1991–2020 average (Mar 23).

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 New London, PA

The soil mapped at the center of ZIP 19360 is Manor — loam, well drained. Much of the area is built over (urban land); this is the natural soil underneath.

TextureLoama 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 classNot prime farmlandUSDA classification

Map unit: Urban land-Manor complex, 8 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 19360; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in New London, PA

Summer high89 °Faverage high, July
Winter low25 °Faverage low, January
Hot days33days a year at 90 °F or more
Freezing nights97nights a year at 32 °F or less
Growing degree days3,866base 50 °F — the season’s usable heat
Longest day14 h 59 mindaylight on June 21
Shortest day9 h 21 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation47 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 43 °F, low 25 °F 43°25° JanFebruary: average high 46 °F, low 25 °F 46°25° FebMarch: average high 54 °F, low 33 °F 54°33° MarApril: average high 67 °F, low 42 °F 67°42° AprMay: average high 76 °F, low 52 °F 76°52° MayJune: average high 84 °F, low 62 °F 84°62° JunJuly: average high 89 °F, low 66 °F 89°66° JulAugust: average high 87 °F, low 65 °F 87°65° AugSeptember: average high 79 °F, low 58 °F 79°58° SepOctober: average high 69 °F, low 46 °F 69°46° OctNovember: average high 57 °F, low 36 °F 57°36° NovDecember: average high 47 °F, low 30 °F 47°30° Dec

Precipitation by month inches

0″1″2″3″4″5″January: 3.43 in precipitation 3.4 JanFebruary: 2.91 in precipitation 2.9 FebMarch: 4.27 in precipitation 4.3 MarApril: 3.71 in precipitation 3.7 AprMay: 3.63 in precipitation 3.6 MayJune: 3.95 in precipitation 4.0 JunJuly: 4.84 in precipitation 4.8 JulAugust: 3.95 in precipitation 4.0 AugSeptember: 4.87 in precipitation 4.9 SepOctober: 4.00 in precipitation 4.0 OctNovember: 3.36 in precipitation 3.4 NovDecember: 4.04 in precipitation 4.0 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Newark Ag Farm, DE (4 mi away); precipitation: Newark Ag Farm, DE (4 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

193507a
Landenberg, PA · 2 mi
197117b
Newark, DE · 3 mi
193477a
Kemblesville, PA · 3 mi
197177b
Newark, DE · 4 mi
197167b
Newark, DE · 5 mi
193517a
Lewisville, PA · 5 mi
197137b
Newark, DE · 6 mi
219207a
Elk Mills, MD · 6 mi

Pennsylvania planting zones →

Questions about 19360

What planting zone is ZIP code 19360?

ZIP code 19360 (New London, 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 New London, PA?

The median last spring frost (32 °F) near 19360 is April 7; after April 21 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Newark Ag Farm station.

When is the first frost in New London, PA?

The median first fall frost near 19360 is November 2, giving a median frost-free growing season of 208 days.

When should I plant tomatoes in 19360?

Start tomato seeds indoors around Feb 10 – Feb 24 and set transplants outside around Apr 14 – Apr 28, one to three weeks after the median last frost.

How much rain and snow does 19360 get?

About 47 inches of precipitation a year (NOAA 1991–2020 normals, Newark Ag Farm station).

How hot do summers get in New London, PA?

The average high peaks at 89 °F in July, with about 33 days a year at 90 °F or more.

What kind of soil does 19360 have?

The USDA soil survey maps Manor at the center of ZIP 19360: loam, well drained, pH about 5.4 (strongly acidic).

Did spring come early in New London, PA in 2026?

Spring leaf-out near 19360 came on Mar 22 in 2026, about the same as the 1991–2020 average (Mar 23), according to the USA National Phenology Network Spring Index.

What kind of onions grow in New London, PA?

Intermediate onions: the longest day near 19360 is 14 h 59 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 19360 change?

Yes. The 2012 USDA map put 19360 in zone 6b; the 2023 map puts it in zone 7a. The newer map uses 1991–2020 data and more weather stations.