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

Planting zone for 17739 — Jersey Mills, PA

ZIP code 17739 (Jersey Mills, Lycoming County) is in USDA zone 6a: the coldest winter night averages −10 to −5 °F. The median last spring frost is April 30 and the first fall frost October 22.

Where ZIP 17739 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.

Zone6a−10 to −5 °F
Coldest night−23.3 to −20.6 °C
Last frostApr 30
First frostOct 22
2012 zone6a

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 6a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Jersey Mills, 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 Jersey Mills, PA

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 30median — 50% chance of a later frost
Safe for tender plantsMay 17only 10% chance of frost after
First fall frostOctober 22median — 10% chance by Oct 6
Growing season173 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 18 and returns around November 2.

From the NOAA station Renovo, PA — 19 miles away, elevation 659 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 17739

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 19 – Apr 2
SpinachSow outdoors · Mar 19 – Apr 9
Broccoli, cabbageStart indoors · Feb 19 – Mar 5
Broccoli, cabbageTransplant · Apr 9 – Apr 23
Onion setsPlant outdoors · Apr 2 – Apr 16
PotatoesPlant outdoors · Apr 9 – Apr 23
LettuceSow outdoors · Apr 2 – Apr 16
Carrots, beetsSow outdoors · Apr 9 – Apr 23
TomatoesStart indoors · Mar 5 – Mar 19
TomatoesTransplant · May 7 – May 21
Peppers, eggplantStart indoors · Feb 19 – Mar 5
Peppers, eggplantTransplant · May 14 – May 28
BeansSow outdoors · May 7 – May 21
Sweet cornSow outdoors · May 7 – May 21
Cucumbers, squashSow outdoors · May 7 – May 21
Fall lettuce, spinachSow outdoors · Aug 27 – Sep 10
GarlicPlant cloves · Oct 8 – Nov 12
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 30) and first fall frost (Oct 22) 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 17739 came on Apr 3 — 11 days earlier than the 1991–2020 average (Apr 14).

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 Jersey Mills, PA

The soil mapped at the center of ZIP 17739 is Leck Kill — channery silt loam, well drained.

TextureChannery silt loama good balance for most vegetables
pH5.9moderately acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter2%moderate
Hydrologic groupAwater soaks in fast
Farmland classprime farmlandUSDA classification

Map unit: Leck kill channery 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 17739; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Jersey Mills, PA

Summer high83 °Faverage high, July
Winter low19 °Faverage low, January
Hot days13days a year at 90 °F or more
Freezing nights138nights a year at 32 °F or less
Growing degree days2,752base 50 °F — the season’s usable heat
Longest day15 h 10 mindaylight on June 21
Shortest day9 h 11 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation41.2 inper year, rain and melted snow
Snowfall33 inper year; 43 days with snow on the ground

Average high and low, by month

10°20°30°40°50°60°70°80°90°32 °FJanuary: average high 34 °F, low 19 °F 34°19° JanFebruary: average high 38 °F, low 20 °F 38°20° FebMarch: average high 47 °F, low 26 °F 47°26° MarApril: average high 61 °F, low 36 °F 61°36° AprMay: average high 72 °F, low 46 °F 72°46° MayJune: average high 79 °F, low 56 °F 79°56° JunJuly: average high 83 °F, low 60 °F 83°60° JulAugust: average high 81 °F, low 59 °F 81°59° AugSeptember: average high 75 °F, low 52 °F 75°52° SepOctober: average high 62 °F, low 41 °F 62°41° OctNovember: average high 50 °F, low 32 °F 50°32° NovDecember: average high 39 °F, low 25 °F 39°25° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″3″4″5″January: 2.74 in precipitation, 9 in snowfall 2.7❄9 JanFebruary: 2.21 in precipitation, 9.5 in snowfall 2.2❄10 FebMarch: 3.06 in precipitation, 5.2 in snowfall 3.1❄5 MarApril: 3.61 in precipitation, 0.7 in snowfall 3.6❄1 AprMay: 3.85 in precipitation 3.9 MayJune: 4.02 in precipitation 4.0 JunJuly: 3.95 in precipitation 4.0 JulAugust: 3.72 in precipitation 3.7 AugSeptember: 4.30 in precipitation 4.3 SepOctober: 3.51 in precipitation, 0.1 in snowfall 3.5 OctNovember: 3.12 in precipitation, 1.5 in snowfall 3.1❄2 NovDecember: 3.13 in precipitation, 6.7 in snowfall 3.1❄7 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Renovo, PA (19 mi away); precipitation: Renovo, PA (19 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 6a.

177236a
Jersey Shore, PA · 4 mi
177766a
Waterville, PA · 5 mi
177696a
Slate Run, PA · 8 mi
177276a
Cedar Run, PA · 9 mi
177456a
Lock Haven, PA · 10 mi
169386a
Morris, PA · 12 mi
177606a
North Bend, PA · 14 mi
177406a
Jersey Shore, PA · 14 mi

Pennsylvania planting zones →

Questions about 17739

What planting zone is ZIP code 17739?

ZIP code 17739 (Jersey Mills, PA) is in USDA hardiness zone 6a on the 2023 map: the coldest night of an average winter reaches −10 to −5 °F (−23.3 to −20.6 °C).

When is the last frost in Jersey Mills, PA?

The median last spring frost (32 °F) near 17739 is April 30; after May 17 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Renovo station.

When is the first frost in Jersey Mills, PA?

The median first fall frost near 17739 is October 22, giving a median frost-free growing season of 173 days.

When should I plant tomatoes in 17739?

Start tomato seeds indoors around Mar 5 – Mar 19 and set transplants outside around May 7 – May 21, one to three weeks after the median last frost.

How much rain and snow does 17739 get?

About 41.2 inches of precipitation a year and 33 inches of snowfall (NOAA 1991–2020 normals, Renovo station).

How hot do summers get in Jersey Mills, PA?

The average high peaks at 83 °F in July, with about 13 days a year at 90 °F or more.

What kind of soil does 17739 have?

The USDA soil survey maps Leck Kill at the center of ZIP 17739: channery silt loam, well drained, pH about 5.9 (moderately acidic).

Did spring come early in Jersey Mills, PA in 2026?

Spring leaf-out near 17739 came on Apr 3 in 2026, 11 days earlier than the 1991–2020 average (Apr 14), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Jersey Mills, PA?

Long-day onions: the longest day near 17739 is 15 h 10 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).