Data: 2023 USDA zones (PRISM/OSU) · NOAA 1991–2020 normals · updated Oct 29, 2026

Planting zone for 16733 — Hazel Hurst, PA

ZIP code 16733 (Hazel Hurst, McKean County) is in USDA zone 5b: the coldest winter night averages −15 to −10 °F. The median last spring frost is May 15 and the first fall frost October 3.

Where ZIP 16733 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.

Zone5b−15 to −10 °F

Coldest night−26.1 to −23.3 °C

Last frostMay 15

First frostOct 3

2012 zone5a

Was 5a 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 5b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Hazel Hurst, 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 Hazel Hurst, PA

JanFebMarAprMayJunJulAugSepOctNovDec

Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free

Last spring frostMay 15median — 50% chance of a later frost

Safe for tender plantsMay 31only 10% chance of frost after

First fall frostOctober 3median — 10% chance by Sep 21

Growing season140 daysfrost-free, median

A hard freeze (28 °F) usually ends around May 4 and returns around October 16.

From the NOAA station Clermont 1 Nw, PA — 4 miles away, elevation 2,080 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 16733

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Apr 3 – Apr 17

SpinachSow outdoors · Apr 3 – Apr 24

Broccoli, cabbageStart indoors · Mar 6 – Mar 20

Broccoli, cabbageTransplant · Apr 24 – May 8

Onion setsPlant outdoors · Apr 17 – May 1

PotatoesPlant outdoors · Apr 24 – May 8

LettuceSow outdoors · Apr 17 – May 1

Carrots, beetsSow outdoors · Apr 24 – May 8

TomatoesStart indoors · Mar 20 – Apr 3

TomatoesTransplant · May 22 – Jun 5

Peppers, eggplantStart indoors · Mar 6 – Mar 20

Peppers, eggplantTransplant · May 29 – Jun 12

BeansSow outdoors · May 22 – Jun 5

Sweet cornSow outdoors · May 22 – Jun 5

Cucumbers, squashSow outdoors · May 22 – Jun 5

Fall lettuce, spinachSow outdoors · Aug 8 – Aug 22

GarlicPlant cloves · Sep 19 – Oct 24

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 15) and first fall frost (Oct 3) 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 16733 came on Apr 4 — 10 days earlier than the 1991–2020 average (Apr 14).

average
Apr 142026
Apr 4

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 Hazel Hurst, PA

The soil mapped at the center of ZIP 16733 is Hazleton — channery loam, well drained.

TextureChannery loama good balance for most vegetables

pH4.6strongly acidic; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter3%moderate

Hydrologic groupAwater soaks in fast

Farmland classNot prime farmlandUSDA classification

Map unit: Hazleton channery loam, 8 to 25 percent slopes, very stony.

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 16733; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Hazel Hurst, PA

Summer high76 °Faverage high, July

Winter low13 °Faverage low, January

Hot days0days a year at 90 °F or more

Freezing nights166nights a year at 32 °F or less

Growing degree days1,804base 50 °F — the season’s usable heat

Longest day15 h 12 mindaylight on June 21

Shortest day9 h 09 mindaylight on December 21

Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)

Precipitation50.8 inper year, rain and melted snow

Snowfall80 inper year; 90 days with snow on the ground

Average high and low, by month

Precipitation by month inches · ❄ = snowfall

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Clermont 1 Nw, PA (4 mi away); precipitation: Clermont 1 Nw, PA (4 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 5b.

167405b

Mount Jewett, PA · 5 mi

Lewis Run, PA · 11 mi

167325b

Gifford, PA · 11 mi

167305b

East Smethport, PA · 11 mi

167445b

Rew, PA · 12 mi

Pennsylvania planting zones →

Questions about 16733

What planting zone is ZIP code 16733?

ZIP code 16733 (Hazel Hurst, PA) is in USDA hardiness zone 5b on the 2023 map: the coldest night of an average winter reaches −15 to −10 °F (−26.1 to −23.3 °C).

When is the last frost in Hazel Hurst, PA?

The median last spring frost (32 °F) near 16733 is May 15; after May 31 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Clermont 1 Nw station.

When is the first frost in Hazel Hurst, PA?

The median first fall frost near 16733 is October 3, giving a median frost-free growing season of 140 days.

When should I plant tomatoes in 16733?

Start tomato seeds indoors around Mar 20 – Apr 3 and set transplants outside around May 22 – Jun 5, one to three weeks after the median last frost.

How much rain and snow does 16733 get?

About 50.8 inches of precipitation a year and 80 inches of snowfall (NOAA 1991–2020 normals, Clermont 1 Nw station).

How hot do summers get in Hazel Hurst, PA?

The average high peaks at 76 °F in July, with about 0 days a year at 90 °F or more.

What kind of soil does 16733 have?

The USDA soil survey maps Hazleton at the center of ZIP 16733: channery loam, well drained, pH about 4.6 (strongly acidic).

Did spring come early in Hazel Hurst, PA in 2026?

Spring leaf-out near 16733 came on Apr 4 in 2026, 10 days earlier than the 1991–2020 average (Apr 14), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Hazel Hurst, PA?

Long-day onions: the longest day near 16733 is 15 h 12 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 16733 change?

Yes. The 2012 USDA map put 16733 in zone 5a; the 2023 map puts it in zone 5b. The newer map uses 1991–2020 data and more weather stations.