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

Planting zone for 12055 — Dormansville, NY

ZIP code 12055 (Dormansville, Albany County) is in USDA zone 5b: the coldest winter night averages −15 to −10 °F. The median last spring frost is May 3 and the first fall frost October 12.

Where ZIP 12055 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.

Zone5b−15 to −10 °F
Coldest night−26.1 to −23.3 °C
Last frostMay 3
First frostOct 12
2012 zone5b

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 5b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Dormansville, 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 Dormansville, NY

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMay 3median — 50% chance of a later frost
Safe for tender plantsMay 18only 10% chance of frost after
First fall frostOctober 12median — 10% chance by Oct 1
Growing season160 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 21 and returns around October 25.

From the NOAA station Alcove Dam, NY — 11 miles away, elevation 607 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 12055

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 22 – Apr 5
SpinachSow outdoors · Mar 22 – Apr 12
Broccoli, cabbageStart indoors · Feb 22 – Mar 8
Broccoli, cabbageTransplant · Apr 12 – Apr 26
Onion setsPlant outdoors · Apr 5 – Apr 19
PotatoesPlant outdoors · Apr 12 – Apr 26
LettuceSow outdoors · Apr 5 – Apr 19
Carrots, beetsSow outdoors · Apr 12 – Apr 26
TomatoesStart indoors · Mar 8 – Mar 22
TomatoesTransplant · May 10 – May 24
Peppers, eggplantStart indoors · Feb 22 – Mar 8
Peppers, eggplantTransplant · May 17 – May 31
BeansSow outdoors · May 10 – May 24
Sweet cornSow outdoors · May 10 – May 24
Cucumbers, squashSow outdoors · May 10 – May 24
Fall lettuce, spinachSow outdoors · Aug 17 – Aug 31
GarlicPlant cloves · Sep 28 – Nov 2
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 3) and first fall frost (Oct 12) 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 12055 came on Apr 11 — about the same time as the 1991–2020 average (Apr 12).

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 5b in New York

609 plants native to the lower 48 states, recorded in New York, and rated by the USDA to survive −15 °F or colder — the bottom of zone 5b. Each links to its USDA PLANTS profile.

Trees 75

American basswood100 ft · blooms late spring · low shade tolerance · to −46 °FAmerican beech80 ft · blooms mid spring · low shade tolerance · to −44 °FAmerican chestnut115 ft · blooms early summer · high shade tolerance · to −33 °FAmerican elm120 ft · blooms early spring · medium shade tolerance · to −46 °FAmerican sycamore100 ft · blooms spring · medium shade tolerance · to −34 °Farborvitae50 ft · blooms mid spring · medium shade tolerance · to −33 °F

Shrubs 120

alderleaf buckthorn3 ft · blooms late spring · low shade tolerance · to −33 °FAllegheny serviceberry35 ft · blooms early spring · low shade tolerance · to −38 °Falternateleaf dogwood25 ft · blooms mid spring · low shade tolerance · to −47 °FAmerican black currant3 ft · blooms early spring · to −46 °FAmerican hazelnut10 ft · blooms spring · medium shade tolerance · to −33 °FAmerican holly40 ft · blooms mid spring · low shade tolerance · to −20 °F

Wildflowers & perennials 208

alkali buttercup1 ft · blooms late spring · low shade tolerance · to −38 °FAmerican bur-reed3 ft · blooms indeterminate · medium shade tolerance · to −33 °FAmerican eelgrass1 ft · blooms mid summer · high shade tolerance · to −33 °FAmerican licorice4 ft · blooms late spring · medium shade tolerance · to −38 °FAmerican lotus3 ft · blooms mid summer · high shade tolerance · to −36 °FAmerican pokeweed7 ft · blooms mid summer · low shade tolerance · to −33 °F

Grasses 185

alkali sacaton3 ft · blooms mid summer · high shade tolerance · to −38 °FAmerican beachgrass2.5 ft · blooms spring · high shade tolerance · to −28 °Farctic brome3 ft · blooms early summer · low shade tolerance · to −33 °Fawlfruit sedge4 ft · blooms mid spring · low shade tolerance · to −38 °FBailey's sedge2.1 ft · blooms late spring · low shade tolerance · to −33 °Fbeaked sedge4 ft · blooms late spring · low shade tolerance · to −38 °F

Vines 7

American bittersweet15 ft · blooms spring · low shade tolerance · to −38 °Fdevil's darning needles15 ft · blooms mid summer · medium shade tolerance · to −38 °Ffrost grape83 ft · blooms late spring · medium shade tolerance · to −23 °Friverbank grape45 ft · blooms late spring · medium shade tolerance · to −33 °Fsummer grape30 ft · blooms late spring · low shade tolerance · to −23 °Ftrumpet honeysuckle16 ft · blooms late summer · low shade tolerance · to −33 °F

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 Dormansville, NY.

Soil in Dormansville, NY

The soil mapped at the center of ZIP 12055 is Nunda — silt loam, moderately well drained.

TextureSilt loama good balance for most vegetables
pH6.6neutral; most vegetables like 6.0–7.0
DrainageModerately well drainednatural drainage class
Organic matter5%high
Hydrologic groupC/Dslow when drained; wet otherwise
Farmland classNot prime farmlandUSDA classification

Map unit: Nunda silt loam, 25 to 35 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 12055; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Dormansville, NY

Summer high80 °Faverage high, July
Winter low13 °Faverage low, January
Hot days4days a year at 90 °F or more
Freezing nights156nights a year at 32 °F or less
Growing degree days2,281base 50 °F — the season’s usable heat
Longest day15 h 19 mindaylight on June 21
Shortest day9 h 03 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation45 inper year, rain and melted snow

Average high and low, by month

0°10°20°30°40°50°60°70°80°90°32 °FJanuary: average high 32 °F, low 13 °F 32°13° JanFebruary: average high 34 °F, low 13 °F 34°13° FebMarch: average high 43 °F, low 22 °F 43°22° MarApril: average high 56 °F, low 34 °F 56°34° AprMay: average high 68 °F, low 45 °F 68°45° MayJune: average high 75 °F, low 54 °F 75°54° JunJuly: average high 80 °F, low 59 °F 80°59° JulAugust: average high 78 °F, low 58 °F 78°58° AugSeptember: average high 71 °F, low 50 °F 71°50° SepOctober: average high 59 °F, low 39 °F 59°39° OctNovember: average high 47 °F, low 29 °F 47°29° NovDecember: average high 37 °F, low 21 °F 37°21° Dec

Precipitation by month inches

0″1″2″3″4″5″January: 2.89 in precipitation 2.9 JanFebruary: 2.78 in precipitation 2.8 FebMarch: 3.59 in precipitation 3.6 MarApril: 3.63 in precipitation 3.6 AprMay: 3.63 in precipitation 3.6 MayJune: 4.53 in precipitation 4.5 JunJuly: 4.79 in precipitation 4.8 JulAugust: 4.20 in precipitation 4.2 AugSeptember: 3.77 in precipitation 3.8 SepOctober: 4.72 in precipitation 4.7 OctNovember: 3.03 in precipitation 3.0 NovDecember: 3.47 in precipitation 3.5 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Alcove Dam, NY (11 mi away); precipitation: Altamont 2.7 Ssw, NY (6 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

121865b
Voorheesville, NY · 1 mi
120595b
East Berne, NY · 5 mi
120676a
Feura Bush, NY · 5 mi
120415b
Clarksville, NY · 5 mi
121596a
Slingerlands, NY · 5 mi
120546a
Delmar, NY · 5 mi
120856a
Guilderland Center, NY · 6 mi
120095b
Altamont, NY · 7 mi

New York planting zones →

Questions about 12055

What planting zone is ZIP code 12055?

ZIP code 12055 (Dormansville, 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 Dormansville, NY?

The median last spring frost (32 °F) near 12055 is May 3; after May 18 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Alcove Dam station.

When is the first frost in Dormansville, NY?

The median first fall frost near 12055 is October 12, giving a median frost-free growing season of 160 days.

When should I plant tomatoes in 12055?

Start tomato seeds indoors around Mar 8 – Mar 22 and set transplants outside around May 10 – May 24, one to three weeks after the median last frost.

How much rain and snow does 12055 get?

About 45 inches of precipitation a year (NOAA 1991–2020 normals, Altamont 2.7 Ssw station).

How hot do summers get in Dormansville, NY?

The average high peaks at 80 °F in July, with about 4 days a year at 90 °F or more.

What kind of soil does 12055 have?

The USDA soil survey maps Nunda at the center of ZIP 12055: silt loam, moderately well drained, pH about 6.6 (neutral).

Did spring come early in Dormansville, NY in 2026?

Spring leaf-out near 12055 came on Apr 11 in 2026, about the same as the 1991–2020 average (Apr 12), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Dormansville, NY?

Long-day onions: the longest day near 12055 is 15 h 19 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).