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

Planting zone for 02673 — West Yarmouth, MA

ZIP code 02673 (West Yarmouth, Barnstable County) is in USDA zone 7a: the coldest winter night averages 0 to 5 °F. The median last spring frost is April 22 and the first fall frost October 28.

Where ZIP 02673 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 22
First frostOct 28
2012 zone7a

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 7a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for West Yarmouth, 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 West Yarmouth, MA

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 22median — 50% chance of a later frost
Safe for tender plantsMay 5only 10% chance of frost after
First fall frostOctober 28median — 10% chance by Oct 13
Growing season188 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 7 and returns around November 9.

From the NOAA station Hyannis Barnstable Municipal Airport, MA — 2 miles away, elevation 56 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 02673

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 11 – Mar 25
SpinachSow outdoors · Mar 11 – Apr 1
Broccoli, cabbageStart indoors · Feb 11 – Feb 25
Broccoli, cabbageTransplant · Apr 1 – Apr 15
Onion setsPlant outdoors · Mar 25 – Apr 8
PotatoesPlant outdoors · Apr 1 – Apr 15
LettuceSow outdoors · Mar 25 – Apr 8
Carrots, beetsSow outdoors · Apr 1 – Apr 15
TomatoesStart indoors · Feb 25 – Mar 11
TomatoesTransplant · Apr 29 – May 13
Peppers, eggplantStart indoors · Feb 11 – Feb 25
Peppers, eggplantTransplant · May 6 – May 20
BeansSow outdoors · Apr 29 – May 13
Sweet cornSow outdoors · Apr 29 – May 13
Cucumbers, squashSow outdoors · Apr 29 – May 13
Fall lettuce, spinachSow outdoors · Sep 2 – Sep 16
GarlicPlant cloves · Oct 14 – Nov 18
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 22) and first fall frost (Oct 28) 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 02673 came on Apr 6 — about the same time as the 1991–2020 average (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).

Native plants for zone 7a in Massachusetts

561 plants native to the lower 48 states, recorded in Massachusetts, and rated by the USDA to survive 0 °F or colder — the bottom of zone 7a. 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 192

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 West Yarmouth, MA.

Soil in West Yarmouth, MA

The soil mapped at the center of ZIP 02673 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 coarse sand, 0 to 3 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 02673; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in West Yarmouth, MA

Summer high81 °Faverage high, July
Winter low24 °Faverage low, January
Hot days2days a year at 90 °F or more
Freezing nights109nights a year at 32 °F or less
Growing degree days2,764base 50 °F — the season’s usable heat
Longest day15 h 12 mindaylight on June 21
Shortest day9 h 09 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation44.7 inper year, rain and melted snow

Average high and low, by month

10°20°30°40°50°60°70°80°90°32 °FJanuary: average high 40 °F, low 24 °F 40°24° JanFebruary: average high 41 °F, low 25 °F 41°25° FebMarch: average high 46 °F, low 30 °F 46°30° MarApril: average high 55 °F, low 39 °F 55°39° AprMay: average high 65 °F, low 48 °F 65°48° MayJune: average high 74 °F, low 58 °F 74°58° JunJuly: average high 81 °F, low 65 °F 81°65° JulAugust: average high 80 °F, low 63 °F 80°63° AugSeptember: average high 73 °F, low 56 °F 73°56° SepOctober: average high 63 °F, low 46 °F 63°46° OctNovember: average high 54 °F, low 37 °F 54°37° NovDecember: average high 45 °F, low 29 °F 45°29° Dec

Precipitation by month inches

0″1″2″3″4″5″January: 3.90 in precipitation 3.9 JanFebruary: 3.17 in precipitation 3.2 FebMarch: 4.25 in precipitation 4.3 MarApril: 3.90 in precipitation 3.9 AprMay: 3.42 in precipitation 3.4 MayJune: 3.14 in precipitation 3.1 JunJuly: 2.68 in precipitation 2.7 JulAugust: 3.25 in precipitation 3.3 AugSeptember: 3.85 in precipitation 3.9 SepOctober: 4.33 in precipitation 4.3 OctNovember: 4.13 in precipitation 4.1 NovDecember: 4.68 in precipitation 4.7 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Hyannis Barnstable Municipal Airport, MA (2 mi away); precipitation: Hyannis Barnstable Municipal Airport, MA (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.

026017a
Hyannis, MA · 2 mi
026647a
South Yarmouth, MA · 3 mi
026477a
Hyannis Port, MA · 4 mi
026757a
Yarmouth Port, MA · 4 mi
026727a
West Hyannisport, MA · 4 mi
026377a
Cummaquid, MA · 4 mi
026707b
West Dennis, MA · 4 mi
026307a
Barnstable, MA · 5 mi

Massachusetts planting zones →

Questions about 02673

What planting zone is ZIP code 02673?

ZIP code 02673 (West Yarmouth, MA) 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 West Yarmouth, MA?

The median last spring frost (32 °F) near 02673 is April 22; after May 5 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Hyannis Barnstable Municipal Airport station.

When is the first frost in West Yarmouth, MA?

The median first fall frost near 02673 is October 28, giving a median frost-free growing season of 188 days.

When should I plant tomatoes in 02673?

Start tomato seeds indoors around Feb 25 – Mar 11 and set transplants outside around Apr 29 – May 13, one to three weeks after the median last frost.

How much rain and snow does 02673 get?

About 44.7 inches of precipitation a year (NOAA 1991–2020 normals, Hyannis Barnstable Municipal Airport station).

How hot do summers get in West Yarmouth, MA?

The average high peaks at 81 °F in July, with about 2 days a year at 90 °F or more.

What kind of soil does 02673 have?

The USDA soil survey maps Carver at the center of ZIP 02673: slightly decomposed plant material, excessively drained.

Did spring come early in West Yarmouth, MA in 2026?

Spring leaf-out near 02673 came on Apr 6 in 2026, about the same as the 1991–2020 average (Apr 5), according to the USA National Phenology Network Spring Index.

What kind of onions grow in West Yarmouth, MA?

Long-day onions: the longest day near 02673 is 15 h 12 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).