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

Planting zone for 10984 — Thiells, NY

ZIP code 10984 (Thiells, Rockland County) is in USDA zone 7a: the coldest winter night averages 0 to 5 °F. The median last spring frost is April 25 and the first fall frost October 19.

Where ZIP 10984 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 25

First frostOct 19

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 Thiells, 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 Thiells, NY

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostApril 25median — 50% chance of a later frost

Safe for tender plantsMay 8only 10% chance of frost after

First fall frostOctober 19median — 10% chance by Oct 4

Growing season174 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 13 and returns around November 1.

From the NOAA station Yorktown Hts 1w, NY — 12 miles away, elevation 669 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 10984

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Mar 14 – Mar 28

SpinachSow outdoors · Mar 14 – Apr 4

Broccoli, cabbageStart indoors · Feb 14 – Feb 28

Broccoli, cabbageTransplant · Apr 4 – Apr 18

Onion setsPlant outdoors · Mar 28 – Apr 11

PotatoesPlant outdoors · Apr 4 – Apr 18

LettuceSow outdoors · Mar 28 – Apr 11

Carrots, beetsSow outdoors · Apr 4 – Apr 18

TomatoesStart indoors · Feb 28 – Mar 14

TomatoesTransplant · May 2 – May 16

Peppers, eggplantStart indoors · Feb 14 – Feb 28

Peppers, eggplantTransplant · May 9 – May 23

BeansSow outdoors · May 2 – May 16

Sweet cornSow outdoors · May 2 – May 16

Cucumbers, squashSow outdoors · May 2 – May 16

Fall lettuce, spinachSow outdoors · Aug 24 – Sep 7

GarlicPlant cloves · Oct 5 – Nov 9

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 25) and first fall frost (Oct 19) 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 10984 came on Apr 1 — 3 days earlier than the 1991–2020 average (Apr 4).

average
Apr 42026
Apr 1

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).

Native plants for zone 7a in New York

656 plants native to the lower 48 states, recorded in New York, and rated by the USDA to survive 0 °F or colder — the bottom of zone 7a. Each links to its USDA PLANTS profile.

Source: USDA, NRCS. 2026. The PLANTS Database (plants.usda.gov), National Plant Data Team — state distribution, native status and the “Temperature, Minimum” characteristic. Check light, moisture and soil needs before buying; local nurseries and your state native plant society can confirm what thrives in Thiells, NY.

Soil in Thiells, NY

The soil mapped at the center of ZIP 10984 is Wethersfield — gravelly silt loam, well drained.

TextureGravelly silt loama good balance for most vegetables

pH5.3strongly acidic; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter3.5%moderate

Hydrologic groupCwater soaks in slowly

Farmland classNot prime farmlandUSDA classification

Map unit: Wethersfield gravelly silt loam, 15 to 25 percent slope s.

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 10984; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Thiells, NY

Summer high83 °Faverage high, July

Winter low17 °Faverage low, January

Hot days10days a year at 90 °F or more

Freezing nights116nights a year at 32 °F or less

Growing degree days2,692base 50 °F — the season’s usable heat

Longest day15 h 09 mindaylight on June 21

Shortest day9 h 12 mindaylight on December 21

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

Precipitation49.3 inper year, rain and melted snow

Average high and low, by month

Precipitation by month inches

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Yorktown Hts 1w, NY (12 mi away); precipitation: Peekskill 0.4 N, NY (8 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

1 of the 8 nearest ZIP codes are in a different zone — elevation and distance from water change winter lows quickly.

109237a

Garnerville, NY · 1 mi

109707a

Pomona, NY · 2 mi

109937a

West Haverstraw, NY · 3 mi

109277a

Haverstraw, NY · 3 mi

109806b

Stony Point, NY · 3 mi

New York planting zones →

Questions about 10984

What planting zone is ZIP code 10984?

ZIP code 10984 (Thiells, NY) 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 Thiells, NY?

The median last spring frost (32 °F) near 10984 is April 25; after May 8 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Yorktown Hts 1w station.

When is the first frost in Thiells, NY?

The median first fall frost near 10984 is October 19, giving a median frost-free growing season of 174 days.

When should I plant tomatoes in 10984?

Start tomato seeds indoors around Feb 28 – Mar 14 and set transplants outside around May 2 – May 16, one to three weeks after the median last frost.

How much rain and snow does 10984 get?

About 49.3 inches of precipitation a year (NOAA 1991–2020 normals, Peekskill 0.4 N station).

How hot do summers get in Thiells, NY?

The average high peaks at 83 °F in July, with about 10 days a year at 90 °F or more.

What kind of soil does 10984 have?

The USDA soil survey maps Wethersfield at the center of ZIP 10984: gravelly silt loam, well drained, pH about 5.3 (strongly acidic).

Did spring come early in Thiells, NY in 2026?

Spring leaf-out near 10984 came on Apr 1 in 2026, 3 days earlier than the 1991–2020 average (Apr 4), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Thiells, NY?

Long-day onions: the longest day near 10984 is 15 h 09 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 10984 change?

Yes. The 2012 USDA map put 10984 in zone 6b; the 2023 map puts it in zone 7a. The newer map uses 1991–2020 data and more weather stations.