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

Planting zone for 13339 — Fort Plain, NY

ZIP code 13339 (Fort Plain, Montgomery County) is in USDA zone 5b: the coldest winter night averages −15 to −10 °F. The median last spring frost is May 6 and the first fall frost October 6.

Where ZIP 13339 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 6
First frostOct 6
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 Fort Plain, 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 Fort Plain, NY

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMay 6median — 50% chance of a later frost
Safe for tender plantsMay 24only 10% chance of frost after
First fall frostOctober 6median — 10% chance by Sep 24
Growing season152 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 25 and returns around October 20.

From the NOAA station Cherry Valley 2 Nne, NY — 9 miles away, elevation 1,362 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 13339

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 25 – Apr 8
SpinachSow outdoors · Mar 25 – Apr 15
Broccoli, cabbageStart indoors · Feb 25 – Mar 11
Broccoli, cabbageTransplant · Apr 15 – Apr 29
Onion setsPlant outdoors · Apr 8 – Apr 22
PotatoesPlant outdoors · Apr 15 – Apr 29
LettuceSow outdoors · Apr 8 – Apr 22
Carrots, beetsSow outdoors · Apr 15 – Apr 29
TomatoesStart indoors · Mar 11 – Mar 25
TomatoesTransplant · May 13 – May 27
Peppers, eggplantStart indoors · Feb 25 – Mar 11
Peppers, eggplantTransplant · May 20 – Jun 3
BeansSow outdoors · May 13 – May 27
Sweet cornSow outdoors · May 13 – May 27
Cucumbers, squashSow outdoors · May 13 – May 27
Fall lettuce, spinachSow outdoors · Aug 11 – Aug 25
GarlicPlant cloves · Sep 22 – Oct 27
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 6) and first fall frost (Oct 6) 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 13339 came on Apr 10 — 5 days earlier than the 1991–2020 average (Apr 15).

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 Fort Plain, NY

The soil mapped at the center of ZIP 13339 is Churchville — silty clay loam, somewhat poorly drained.

TextureSilty clay loamholds water and nutrients; slow to drain and warm up
pH6.5neutral; most vegetables like 6.0–7.0
DrainageSomewhat poorly drainedconsider raised beds
Organic matter4%moderate
Hydrologic groupC/Dslow when drained; wet otherwise
Farmland classPrime farmland if drainedUSDA classification

Map unit: Churchville silty clay 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 13339; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Fort Plain, NY

Summer high78 °Faverage high, July
Winter low13 °Faverage low, January
Hot days1days a year at 90 °F or more
Freezing nights154nights a year at 32 °F or less
Growing degree days2,117base 50 °F — the season’s usable heat
Longest day15 h 21 mindaylight on June 21
Shortest day9 h 00 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation40.8 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 28 °F, low 13 °F 28°13° JanFebruary: average high 31 °F, low 14 °F 31°14° FebMarch: average high 40 °F, low 22 °F 40°22° MarApril: average high 54 °F, low 33 °F 54°33° AprMay: average high 66 °F, low 45 °F 66°45° MayJune: average high 74 °F, low 54 °F 74°54° JunJuly: average high 78 °F, low 58 °F 78°58° JulAugust: average high 76 °F, low 56 °F 76°56° AugSeptember: average high 69 °F, low 50 °F 69°50° SepOctober: average high 58 °F, low 39 °F 58°39° OctNovember: average high 45 °F, low 29 °F 45°29° NovDecember: average high 34 °F, low 20 °F 34°20° Dec

Precipitation by month inches

0″1″2″3″4″5″January: 2.90 in precipitation 2.9 JanFebruary: 2.56 in precipitation 2.6 FebMarch: 3.02 in precipitation 3.0 MarApril: 3.14 in precipitation 3.1 AprMay: 3.68 in precipitation 3.7 MayJune: 3.96 in precipitation 4.0 JunJuly: 4.11 in precipitation 4.1 JulAugust: 4.52 in precipitation 4.5 AugSeptember: 3.34 in precipitation 3.3 SepOctober: 3.93 in precipitation 3.9 OctNovember: 2.87 in precipitation 2.9 NovDecember: 2.79 in precipitation 2.8 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Cherry Valley 2 Nne, NY (9 mi away); precipitation: Fort Plain 0.2 Se, NY (2 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.

134105b
Nelliston, NY · 2 mi
134285b
Palatine Bridge, NY · 7 mi
133175b
Canajoharie, NY · 7 mi
134525a
Saint Johnsville, NY · 7 mi
134755b
Van Hornesville, NY · 8 mi
133615b
Jordanville, NY · 11 mi
133335b
East Springfield, NY · 12 mi
134595b
Sharon Springs, NY · 12 mi

New York planting zones →

Questions about 13339

What planting zone is ZIP code 13339?

ZIP code 13339 (Fort Plain, 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 Fort Plain, NY?

The median last spring frost (32 °F) near 13339 is May 6; after May 24 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Cherry Valley 2 Nne station.

When is the first frost in Fort Plain, NY?

The median first fall frost near 13339 is October 6, giving a median frost-free growing season of 152 days.

When should I plant tomatoes in 13339?

Start tomato seeds indoors around Mar 11 – Mar 25 and set transplants outside around May 13 – May 27, one to three weeks after the median last frost.

How much rain and snow does 13339 get?

About 40.8 inches of precipitation a year (NOAA 1991–2020 normals, Fort Plain 0.2 Se station).

How hot do summers get in Fort Plain, NY?

The average high peaks at 78 °F in July, with about 1 days a year at 90 °F or more.

What kind of soil does 13339 have?

The USDA soil survey maps Churchville at the center of ZIP 13339: silty clay loam, somewhat poorly drained, pH about 6.5 (neutral).

Did spring come early in Fort Plain, NY in 2026?

Spring leaf-out near 13339 came on Apr 10 in 2026, 5 days earlier than the 1991–2020 average (Apr 15), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Fort Plain, NY?

Long-day onions: the longest day near 13339 is 15 h 21 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).