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

Planting zone for 02539 — Edgartown, MA

ZIP code 02539 (Edgartown, Dukes County) is in USDA zone 7b: the coldest winter night averages 5 to 10 °F. The median last spring frost is April 17 and the first fall frost November 3.

Where ZIP 02539 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.

Zone7b5 to 10 °F
Coldest night−15 to −12.2 °C
Last frostApr 17
First frostNov 3
2012 zone7a

Was 7a 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 7b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Edgartown, MA…

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 Edgartown, MA

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 17median — 50% chance of a later frost
Safe for tender plantsMay 3only 10% chance of frost after
First fall frostNovember 3median — 10% chance by Oct 20
Growing season199 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 2 and returns around November 16.

From the NOAA station Edgartown, MA — within 1 mile, elevation 30 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 02539

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 6 – Mar 20
SpinachSow outdoors · Mar 6 – Mar 27
Broccoli, cabbageStart indoors · Feb 6 – Feb 20
Broccoli, cabbageTransplant · Mar 27 – Apr 10
Onion setsPlant outdoors · Mar 20 – Apr 3
PotatoesPlant outdoors · Mar 27 – Apr 10
LettuceSow outdoors · Mar 20 – Apr 3
Carrots, beetsSow outdoors · Mar 27 – Apr 10
TomatoesStart indoors · Feb 20 – Mar 6
TomatoesTransplant · Apr 24 – May 8
Peppers, eggplantStart indoors · Feb 6 – Feb 20
Peppers, eggplantTransplant · May 1 – May 15
BeansSow outdoors · Apr 24 – May 8
Sweet cornSow outdoors · Apr 24 – May 8
Cucumbers, squashSow outdoors · Apr 24 – May 8
Fall lettuce, spinachSow outdoors · Sep 8 – Sep 22
GarlicPlant cloves · Oct 20 – Nov 24
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 17) and first fall frost (Nov 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 02539 came on Apr 4 — 3 days later than the 1991–2020 average (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 7b in Massachusetts

563 plants native to the lower 48 states, recorded in Massachusetts, and rated by the USDA to survive 5 °F or colder — the bottom of zone 7b. Each links to its USDA PLANTS profile.

Trees 67

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 110

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 194

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 165

American beachgrass2.5 ft · blooms spring · high shade tolerance · to −28 °FAmerican cupscale3 ft · blooms early summer · high shade tolerance · to −18 °Farctic brome3 ft · blooms early summer · low shade tolerance · to −33 °FAtlantic mannagrass3 ft · blooms summer · low shade tolerance · to −8 °Fawlfruit sedge4 ft · blooms mid spring · low shade tolerance · to −38 °FBailey's sedge2.1 ft · blooms late spring · low shade tolerance · to −33 °F

Vines 9

American bittersweet15 ft · blooms spring · low shade tolerance · to −38 °FAmerican wisteria50 ft · blooms spring · low shade tolerance · to −3 °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 °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 Edgartown, MA.

Soil in Edgartown, MA

The soil mapped at the center of ZIP 02539 is Carver — slightly decomposed plant material, excessively drained.

TextureSlightly decomposed plant materialtop layer
DrainageExcessively drainednatural drainage class
Organic matter80%high
Hydrologic groupAwater soaks in fast
Farmland classNot prime farmlandUSDA classification

Map unit: Carver loamy coarse sand, 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 02539; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Edgartown, MA

Summer high80 °Faverage high, July
Winter low26 °Faverage low, January
Hot days2days a year at 90 °F or more
Freezing nights95nights a year at 32 °F or less
Growing degree days2,867base 50 °F — the season’s usable heat
Longest day15 h 10 mindaylight on June 21
Shortest day9 h 11 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation47.7 inper year, rain and melted snow
Snowfall25 inper year; 20 days with snow on the ground

Average high and low, by month

20°30°40°50°60°70°80°90°32 °FJanuary: average high 40 °F, low 26 °F 40°26° JanFebruary: average high 42 °F, low 27 °F 42°27° FebMarch: average high 46 °F, low 32 °F 46°32° MarApril: average high 55 °F, low 40 °F 55°40° AprMay: average high 65 °F, low 49 °F 65°49° MayJune: average high 74 °F, low 58 °F 74°58° JunJuly: average high 80 °F, low 64 °F 80°64° JulAugust: average high 80 °F, low 64 °F 80°64° AugSeptember: average high 74 °F, low 58 °F 74°58° SepOctober: average high 64 °F, low 48 °F 64°48° OctNovember: average high 54 °F, low 40 °F 54°40° NovDecember: average high 46 °F, low 31 °F 46°31° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″3″4″5″January: 4.10 in precipitation, 8.8 in snowfall 4.1❄9 JanFebruary: 3.57 in precipitation, 8.1 in snowfall 3.6❄8 FebMarch: 4.80 in precipitation, 4.7 in snowfall 4.8❄5 MarApril: 4.18 in precipitation, 0.3 in snowfall 4.2 AprMay: 3.74 in precipitation 3.7 MayJune: 3.39 in precipitation 3.4 JunJuly: 2.64 in precipitation 2.6 JulAugust: 3.72 in precipitation 3.7 AugSeptember: 3.89 in precipitation 3.9 SepOctober: 4.63 in precipitation 4.6 OctNovember: 4.21 in precipitation 4.2 NovDecember: 4.84 in precipitation, 3.4 in snowfall 4.8❄3 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Edgartown, MA (within 1 mile); precipitation: Edgartown, MA (within 1 mile). Daylight is calculated from latitude.

Nearby ZIP codes

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

025577a
Oak Bluffs, MA · 5 mi
025527b
Menemsha, MA · 6 mi
025687a
Vineyard Haven, MA · 7 mi
025757a
West Tisbury, MA · 7 mi
025357b
Chilmark, MA · 13 mi
025417a
Falmouth, MA · 13 mi
025407a
Falmouth, MA · 14 mi
025437b
Woods Hole, MA · 15 mi

Massachusetts planting zones →

Questions about 02539

What planting zone is ZIP code 02539?

ZIP code 02539 (Edgartown, MA) is in USDA hardiness zone 7b on the 2023 map: the coldest night of an average winter reaches 5 to 10 °F (−15 to −12.2 °C).

When is the last frost in Edgartown, MA?

The median last spring frost (32 °F) near 02539 is April 17; after May 3 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Edgartown station.

When is the first frost in Edgartown, MA?

The median first fall frost near 02539 is November 3, giving a median frost-free growing season of 199 days.

When should I plant tomatoes in 02539?

Start tomato seeds indoors around Feb 20 – Mar 6 and set transplants outside around Apr 24 – May 8, one to three weeks after the median last frost.

How much rain and snow does 02539 get?

About 47.7 inches of precipitation a year and 25 inches of snowfall (NOAA 1991–2020 normals, Edgartown station).

How hot do summers get in Edgartown, MA?

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 02539 have?

The USDA soil survey maps Carver at the center of ZIP 02539: slightly decomposed plant material, excessively drained.

Did spring come early in Edgartown, MA in 2026?

Spring leaf-out near 02539 came on Apr 4 in 2026, 3 days later than the 1991–2020 average (Apr 1), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Edgartown, MA?

Long-day onions: the longest day near 02539 is 15 h 10 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 02539 change?

Yes. The 2012 USDA map put 02539 in zone 7a; the 2023 map puts it in zone 7b. The newer map uses 1991–2020 data and more weather stations.