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

Planting zone for 19160 — Philadelphia, PA

ZIP code 19160 (Philadelphia, Philadelphia County) is in USDA zone 7b: the coldest winter night averages 5 to 10 °F. The median last spring frost is March 30 and the first fall frost November 17.

Where ZIP 19160 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.

Zone7b5 to 10 °F
Coldest night−15 to −12.2 °C
Last frostMar 30
First frostNov 17
2012 zone7a

Was 7a 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 7b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Philadelphia, 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 Philadelphia, PA

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMarch 30median — 50% chance of a later frost
Safe for tender plantsApril 12only 10% chance of frost after
First fall frostNovember 17median — 10% chance by Nov 4
Growing season232 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 17 and returns around November 29.

From the NOAA station Phila Franklin Inst, PA — 4 miles away, elevation 59 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 19160

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Feb 16 – Mar 2
SpinachSow outdoors · Feb 16 – Mar 9
Broccoli, cabbageStart indoors · Jan 19 – Feb 2
Broccoli, cabbageTransplant · Mar 9 – Mar 23
Onion setsPlant outdoors · Mar 2 – Mar 16
PotatoesPlant outdoors · Mar 9 – Mar 23
LettuceSow outdoors · Mar 2 – Mar 16
Carrots, beetsSow outdoors · Mar 9 – Mar 23
TomatoesStart indoors · Feb 2 – Feb 16
TomatoesTransplant · Apr 6 – Apr 20
Peppers, eggplantStart indoors · Jan 19 – Feb 2
Peppers, eggplantTransplant · Apr 13 – Apr 27
BeansSow outdoors · Apr 6 – Apr 20
Sweet cornSow outdoors · Apr 6 – Apr 20
Cucumbers, squashSow outdoors · Apr 6 – Apr 20
Fall lettuce, spinachSow outdoors · Sep 22 – Oct 6
GarlicPlant cloves · Nov 3 – Dec 8
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Mar 30) and first fall frost (Nov 17) 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 19160 came on Mar 13 — 4 days earlier than the 1991–2020 average (Mar 17).

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 Philadelphia, PA

The center of ZIP 19160 is mapped as Urban land: built-over ground without natural soil data. Garden soil here is usually imported or disturbed — test before you plant.

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 19160; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Philadelphia, PA

Summer high89 °Faverage high, July
Winter low28 °Faverage low, January
Hot days40days a year at 90 °F or more
Freezing nights62nights a year at 32 °F or less
Growing degree days4,429base 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)
Precipitation50.7 inper year, rain and melted snow
Snowfall16 inper year; 15 days with snow on the ground

Average high and low, by month

20°30°40°50°60°70°80°90°100°32 °FJanuary: average high 42 °F, low 28 °F 42°28° JanFebruary: average high 45 °F, low 30 °F 45°30° FebMarch: average high 54 °F, low 36 °F 54°36° MarApril: average high 66 °F, low 46 °F 66°46° AprMay: average high 76 °F, low 56 °F 76°56° MayJune: average high 85 °F, low 66 °F 85°66° JunJuly: average high 89 °F, low 71 °F 89°71° JulAugust: average high 87 °F, low 70 °F 87°70° AugSeptember: average high 80 °F, low 63 °F 80°63° SepOctober: average high 68 °F, low 51 °F 68°51° OctNovember: average high 56 °F, low 41 °F 56°41° NovDecember: average high 47 °F, low 33 °F 47°33° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″3″4″5″January: 3.61 in precipitation, 6.4 in snowfall 3.6❄6 JanFebruary: 3.34 in precipitation, 4 in snowfall 3.3❄4 FebMarch: 4.54 in precipitation, 2 in snowfall 4.5❄2 MarApril: 4.00 in precipitation, 0.1 in snowfall 4.0 AprMay: 4.06 in precipitation 4.1 MayJune: 4.77 in precipitation 4.8 JunJuly: 4.75 in precipitation 4.8 JulAugust: 4.95 in precipitation 5.0 AugSeptember: 4.88 in precipitation 4.9 SepOctober: 4.15 in precipitation 4.2 OctNovember: 3.37 in precipitation, 0.1 in snowfall 3.4 NovDecember: 4.27 in precipitation, 3.5 in snowfall 4.3❄4 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Phila Franklin Inst, PA (4 mi away); precipitation: Phila Franklin Inst, PA (4 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 7b.

190197b
Philadelphia, PA · <1 mi
190927b
Philadelphia, PA · <1 mi
190937b
Philadelphia, PA · <1 mi
191017b
Philadelphia, PA · <1 mi
191557b
Philadelphia, PA · <1 mi
191617b
Philadelphia, PA · <1 mi
191627b
Philadelphia, PA · <1 mi
191707b
Philadelphia, PA · <1 mi

All 87 ZIP codes in Philadelphia → · Pennsylvania planting zones →

Questions about 19160

What planting zone is ZIP code 19160?

ZIP code 19160 (Philadelphia, PA) is in USDA hardiness zone 7b on the 2023 map: the coldest night of an average winter reaches 5 to 10 °F (−15 to −12.2 °C).

When is the last frost in Philadelphia, PA?

The median last spring frost (32 °F) near 19160 is March 30; after April 12 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Phila Franklin Inst station.

When is the first frost in Philadelphia, PA?

The median first fall frost near 19160 is November 17, giving a median frost-free growing season of 232 days.

When should I plant tomatoes in 19160?

Start tomato seeds indoors around Feb 2 – Feb 16 and set transplants outside around Apr 6 – Apr 20, one to three weeks after the median last frost.

How much rain and snow does 19160 get?

About 50.7 inches of precipitation a year and 16 inches of snowfall (NOAA 1991–2020 normals, Phila Franklin Inst station).

How hot do summers get in Philadelphia, PA?

The average high peaks at 89 °F in July, with about 40 days a year at 90 °F or more.

Did spring come early in Philadelphia, PA in 2026?

Spring leaf-out near 19160 came on Mar 13 in 2026, 4 days earlier than the 1991–2020 average (Mar 17), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Philadelphia, PA?

Long-day onions: the longest day near 19160 is 15 h 01 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 19160 change?

Yes. The 2012 USDA map put 19160 in zone 7a; the 2023 map puts it in zone 7b. The newer map uses 1991–2020 data and more weather stations.