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

Planting zone for 19345 — Immaculata, PA

ZIP code 19345 (Immaculata, Chester County) is in USDA zone 7a: the coldest winter night averages 0 to 5 °F. The median last spring frost is April 26 and the first fall frost October 18.

Where ZIP 19345 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 26
First frostOct 18
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 Immaculata, 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 Immaculata, PA

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 26median — 50% chance of a later frost
Safe for tender plantsMay 11only 10% chance of frost after
First fall frostOctober 18median — 10% chance by Oct 4
Growing season174 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 11 and returns around October 30.

From the NOAA station W Chester 2 Nw, PA — 6 miles away, elevation 374 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 19345

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 15 – Mar 29
SpinachSow outdoors · Mar 15 – Apr 5
Broccoli, cabbageStart indoors · Feb 15 – Mar 1
Broccoli, cabbageTransplant · Apr 5 – Apr 19
Onion setsPlant outdoors · Mar 29 – Apr 12
PotatoesPlant outdoors · Apr 5 – Apr 19
LettuceSow outdoors · Mar 29 – Apr 12
Carrots, beetsSow outdoors · Apr 5 – Apr 19
TomatoesStart indoors · Mar 1 – Mar 15
TomatoesTransplant · May 3 – May 17
Peppers, eggplantStart indoors · Feb 15 – Mar 1
Peppers, eggplantTransplant · May 10 – May 24
BeansSow outdoors · May 3 – May 17
Sweet cornSow outdoors · May 3 – May 17
Cucumbers, squashSow outdoors · May 3 – May 17
Fall lettuce, spinachSow outdoors · Aug 23 – Sep 6
GarlicPlant cloves · Oct 4 – Nov 8
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 26) and first fall frost (Oct 18) 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 19345 came on Mar 24 — 3 days earlier than the 1991–2020 average (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 Immaculata, PA

The soil mapped at the center of ZIP 19345 is Udorthents — loam, well drained. Much of the area is built over (urban land); this is the natural soil underneath.

TextureLoama good balance for most vegetables
pH5.8moderately acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter1.5%low — add compost
Hydrologic groupCwater soaks in slowly
Farmland classNot prime farmlandUSDA classification

Map unit: Urban land-Udorthents, schist and gneiss complex, 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 19345; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Immaculata, PA

Summer high86 °Faverage high, July
Winter low20 °Faverage low, January
Hot days27days a year at 90 °F or more
Freezing nights131nights a year at 32 °F or less
Growing degree days3,270base 50 °F — the season’s usable heat
Longest day15 h 01 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)
Precipitation50.9 inper year, rain and melted snow
Snowfall31 inper year; 34 days with snow on the ground

Average high and low, by month

10°20°30°40°50°60°70°80°90°100°32 °FJanuary: average high 40 °F, low 20 °F 40°20° JanFebruary: average high 43 °F, low 21 °F 43°21° FebMarch: average high 51 °F, low 29 °F 51°29° MarApril: average high 63 °F, low 38 °F 63°38° AprMay: average high 73 °F, low 49 °F 73°49° MayJune: average high 82 °F, low 59 °F 82°59° JunJuly: average high 86 °F, low 64 °F 86°64° JulAugust: average high 84 °F, low 62 °F 84°62° AugSeptember: average high 78 °F, low 54 °F 78°54° SepOctober: average high 66 °F, low 41 °F 66°41° OctNovember: average high 55 °F, low 32 °F 55°32° NovDecember: average high 44 °F, low 25 °F 44°25° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″3″4″5″6″January: 3.65 in precipitation, 7.9 in snowfall 3.6❄8 JanFebruary: 3.12 in precipitation, 13.2 in snowfall 3.1❄13 FebMarch: 4.61 in precipitation, 4.1 in snowfall 4.6❄4 MarApril: 3.78 in precipitation, 0.4 in snowfall 3.8 AprMay: 3.81 in precipitation 3.8 MayJune: 4.01 in precipitation 4.0 JunJuly: 4.41 in precipitation 4.4 JulAugust: 4.79 in precipitation 4.8 AugSeptember: 5.65 in precipitation 5.7 SepOctober: 4.83 in precipitation 4.8 OctNovember: 3.55 in precipitation, 0.5 in snowfall 3.5❄1 NovDecember: 4.72 in precipitation, 4.4 in snowfall 4.7❄4 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: W Chester 2 Nw, PA (6 mi away); precipitation: W Chester 2 Nw, PA (6 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 7a.

193557a
Malvern, PA · 2 mi
193807a
West Chester, PA · 3 mi
194327a
Devault, PA · 3 mi
193417a
Exton, PA · 4 mi
193537a
Lionville, PA · 4 mi
193017a
Paoli, PA · 5 mi
193817a
West Chester, PA · 5 mi
193127a
Berwyn, PA · 6 mi

Pennsylvania planting zones →

Questions about 19345

What planting zone is ZIP code 19345?

ZIP code 19345 (Immaculata, 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 Immaculata, PA?

The median last spring frost (32 °F) near 19345 is April 26; after May 11 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, W Chester 2 Nw station.

When is the first frost in Immaculata, PA?

The median first fall frost near 19345 is October 18, giving a median frost-free growing season of 174 days.

When should I plant tomatoes in 19345?

Start tomato seeds indoors around Mar 1 – Mar 15 and set transplants outside around May 3 – May 17, one to three weeks after the median last frost.

How much rain and snow does 19345 get?

About 50.9 inches of precipitation a year and 31 inches of snowfall (NOAA 1991–2020 normals, W Chester 2 Nw station).

How hot do summers get in Immaculata, PA?

The average high peaks at 86 °F in July, with about 27 days a year at 90 °F or more.

What kind of soil does 19345 have?

The USDA soil survey maps Udorthents at the center of ZIP 19345: loam, well drained, pH about 5.8 (moderately acidic).

Did spring come early in Immaculata, PA in 2026?

Spring leaf-out near 19345 came on Mar 24 in 2026, 3 days earlier than the 1991–2020 average (Mar 27), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Immaculata, PA?

Long-day onions: the longest day near 19345 is 15 h 01 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 19345 change?

Yes. The 2012 USDA map put 19345 in zone 6b; the 2023 map puts it in zone 7a. The newer map uses 1991–2020 data and more weather stations.