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

Planting zone for 14770 — Portville, NY

ZIP code 14770 (Portville, Cattaraugus County) is in USDA zone 5b: the coldest winter night averages −15 to −10 °F. The median last spring frost is May 7 and the first fall frost October 11.

Where ZIP 14770 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 7

First frostOct 11

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 Portville, NY…

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 Portville, NY

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostMay 7median — 50% chance of a later frost

Safe for tender plantsMay 22only 10% chance of frost after

First fall frostOctober 11median — 10% chance by Sep 29

Growing season156 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 26 and returns around October 24.

From the NOAA station Olean, NY — 8 miles away, elevation 1,421 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 14770

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Mar 26 – Apr 9

SpinachSow outdoors · Mar 26 – Apr 16

Broccoli, cabbageStart indoors · Feb 26 – Mar 12

Broccoli, cabbageTransplant · Apr 16 – Apr 30

Onion setsPlant outdoors · Apr 9 – Apr 23

PotatoesPlant outdoors · Apr 16 – Apr 30

LettuceSow outdoors · Apr 9 – Apr 23

Carrots, beetsSow outdoors · Apr 16 – Apr 30

TomatoesStart indoors · Mar 12 – Mar 26

TomatoesTransplant · May 14 – May 28

Peppers, eggplantStart indoors · Feb 26 – Mar 12

Peppers, eggplantTransplant · May 21 – Jun 4

BeansSow outdoors · May 14 – May 28

Sweet cornSow outdoors · May 14 – May 28

Cucumbers, squashSow outdoors · May 14 – May 28

Fall lettuce, spinachSow outdoors · Aug 16 – Aug 30

GarlicPlant cloves · Sep 27 – Nov 1

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 7) and first fall frost (Oct 11) 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 14770 came on Apr 5 — 9 days earlier than the 1991–2020 average (Apr 14).

average
Apr 142026
Apr 5

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 Portville, NY

The soil mapped at the center of ZIP 14770 is Ceres — channery silt loam, well drained.

TextureChannery silt loama good balance for most vegetables

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

DrainageWell drainednatural drainage class

Organic matter10%high

Hydrologic groupBwater soaks in moderately

Farmland classFarmland of statewide importanceUSDA classification

Map unit: Ceres channery silt loam, 8 to 15 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 14770; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Portville, NY

Summer high80 °Faverage high, July

Winter low13 °Faverage low, January

Hot days2days a year at 90 °F or more

Freezing nights150nights a year at 32 °F or less

Growing degree days2,261base 50 °F — the season’s usable heat

Longest day15 h 15 mindaylight on June 21

Shortest day9 h 06 mindaylight on December 21

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

Precipitation46.7 inper year, rain and melted snow

Snowfall103 inper year; 89 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: Olean, NY (8 mi away); precipitation: Friendship 7 Sw, NY (7 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 5b.

147215b

Ceres, NY · 2 mi

147885b

Westons Mills, NY · 4 mi

147545b

Little Genesee, NY · 5 mi

West Clarksville, NY · 7 mi

New York planting zones →

Questions about 14770

What planting zone is ZIP code 14770?

ZIP code 14770 (Portville, NY) 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 Portville, NY?

The median last spring frost (32 °F) near 14770 is May 7; after May 22 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Olean station.

When is the first frost in Portville, NY?

The median first fall frost near 14770 is October 11, giving a median frost-free growing season of 156 days.

When should I plant tomatoes in 14770?

Start tomato seeds indoors around Mar 12 – Mar 26 and set transplants outside around May 14 – May 28, one to three weeks after the median last frost.

How much rain and snow does 14770 get?

About 46.7 inches of precipitation a year and 103 inches of snowfall (NOAA 1991–2020 normals, Friendship 7 Sw station).

How hot do summers get in Portville, NY?

The average high peaks at 80 °F in July, with about 2 days a year at 90 °F or more.

What kind of soil does 14770 have?

The USDA soil survey maps Ceres at the center of ZIP 14770: channery silt loam, well drained, pH about 4.6 (strongly acidic).

Did spring come early in Portville, NY in 2026?

Spring leaf-out near 14770 came on Apr 5 in 2026, 9 days earlier than the 1991–2020 average (Apr 14), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Portville, NY?

Long-day onions: the longest day near 14770 is 15 h 15 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 14770 change?

Yes. The 2012 USDA map put 14770 in zone 5a; the 2023 map puts it in zone 5b. The newer map uses 1991–2020 data and more weather stations.