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

Planting zone for 02071 — South Walpole, MA

ZIP code 02071 (South Walpole, Norfolk County) is in USDA zone 6b: the coldest winter night averages −5 to 0 °F. The median last spring frost is April 27 and the first fall frost October 14.

Where ZIP 02071 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.

Zone6b−5 to 0 °F
Coldest night−20.6 to −17.8 °C
Last frostApr 27
First frostOct 14
2012 zone6a

Was 6a 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 6b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for South Walpole, 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 South Walpole, MA

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 27median — 50% chance of a later frost
Safe for tender plantsMay 11only 10% chance of frost after
First fall frostOctober 14median — 10% chance by Oct 2
Growing season169 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 13 and returns around October 26.

From the NOAA station Walpole 2, MA — 4 miles away, elevation 171 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 02071

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 16 – Mar 30
SpinachSow outdoors · Mar 16 – Apr 6
Broccoli, cabbageStart indoors · Feb 16 – Mar 2
Broccoli, cabbageTransplant · Apr 6 – Apr 20
Onion setsPlant outdoors · Mar 30 – Apr 13
PotatoesPlant outdoors · Apr 6 – Apr 20
LettuceSow outdoors · Mar 30 – Apr 13
Carrots, beetsSow outdoors · Apr 6 – Apr 20
TomatoesStart indoors · Mar 2 – Mar 16
TomatoesTransplant · May 4 – May 18
Peppers, eggplantStart indoors · Feb 16 – Mar 2
Peppers, eggplantTransplant · May 11 – May 25
BeansSow outdoors · May 4 – May 18
Sweet cornSow outdoors · May 4 – May 18
Cucumbers, squashSow outdoors · May 4 – May 18
Fall lettuce, spinachSow outdoors · Aug 19 – Sep 2
GarlicPlant cloves · Sep 30 – Nov 4
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 27) and first fall frost (Oct 14) 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 02071 came on Apr 3 — 4 days earlier than the 1991–2020 average (Apr 7).

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 6b in Massachusetts

548 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 6b. Each links to its USDA PLANTS profile.

Trees 66

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 109

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 188

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 159

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 8

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 creeper2 ft · blooms summer · high shade tolerance · to −13 °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 South Walpole, MA.

Soil in South Walpole, MA

The soil mapped at the center of ZIP 02071 is Canton — slightly decomposed plant material, well drained.

TextureSlightly decomposed plant materialtop layer
DrainageWell drainednatural drainage class
Organic matter95%high
Hydrologic groupBwater soaks in moderately
Farmland classNot prime farmlandUSDA classification

Map unit: Canton fine sandy loam, 0 to 8 percent slopes, extremely stony.

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 02071; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in South Walpole, MA

Summer high83 °Faverage high, July
Winter low20 °Faverage low, January
Hot days13days a year at 90 °F or more
Freezing nights127nights a year at 32 °F or less
Growing degree days2,916base 50 °F — the season’s usable heat
Longest day15 h 15 mindaylight on June 21
Shortest day9 h 06 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation49.6 inper year, rain and melted snow
Snowfall56 inper year; 59 days with snow on the ground

Average high and low, by month

10°20°30°40°50°60°70°80°90°32 °FJanuary: average high 37 °F, low 20 °F 37°20° JanFebruary: average high 40 °F, low 21 °F 40°21° FebMarch: average high 47 °F, low 28 °F 47°28° MarApril: average high 59 °F, low 38 °F 59°38° AprMay: average high 70 °F, low 48 °F 70°48° MayJune: average high 78 °F, low 57 °F 78°57° JunJuly: average high 83 °F, low 63 °F 83°63° JulAugust: average high 82 °F, low 62 °F 82°62° AugSeptember: average high 74 °F, low 54 °F 74°54° SepOctober: average high 63 °F, low 43 °F 63°43° OctNovember: average high 51 °F, low 34 °F 51°34° NovDecember: average high 42 °F, low 25 °F 42°25° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″3″4″5″January: 3.94 in precipitation, 15.1 in snowfall 3.9❄15 JanFebruary: 3.36 in precipitation, 14.1 in snowfall 3.4❄14 FebMarch: 4.77 in precipitation, 11.6 in snowfall 4.8❄12 MarApril: 4.43 in precipitation, 2.5 in snowfall 4.4❄3 AprMay: 3.59 in precipitation 3.6 MayJune: 4.25 in precipitation 4.3 JunJuly: 3.58 in precipitation 3.6 JulAugust: 3.95 in precipitation 4.0 AugSeptember: 3.71 in precipitation 3.7 SepOctober: 4.97 in precipitation, 0.3 in snowfall 5.0 OctNovember: 4.08 in precipitation, 1.7 in snowfall 4.1❄2 NovDecember: 4.96 in precipitation, 10.8 in snowfall 5.0❄11 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Walpole 2, MA (4 mi away); precipitation: Walpole 2, MA (4 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 6b.

020816b
Walpole, MA · 3 mi
020566b
Norfolk, MA · 3 mi
020356b
Foxboro, MA · 3 mi
020326b
East Walpole, MA · 4 mi
020676b
Sharon, MA · 4 mi
020526b
Medfield, MA · 6 mi
020936b
Wrentham, MA · 6 mi
020546b
Millis, MA · 7 mi

Massachusetts planting zones →

Questions about 02071

What planting zone is ZIP code 02071?

ZIP code 02071 (South Walpole, MA) is in USDA hardiness zone 6b on the 2023 map: the coldest night of an average winter reaches −5 to 0 °F (−20.6 to −17.8 °C).

When is the last frost in South Walpole, MA?

The median last spring frost (32 °F) near 02071 is April 27; after May 11 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Walpole 2 station.

When is the first frost in South Walpole, MA?

The median first fall frost near 02071 is October 14, giving a median frost-free growing season of 169 days.

When should I plant tomatoes in 02071?

Start tomato seeds indoors around Mar 2 – Mar 16 and set transplants outside around May 4 – May 18, one to three weeks after the median last frost.

How much rain and snow does 02071 get?

About 49.6 inches of precipitation a year and 56 inches of snowfall (NOAA 1991–2020 normals, Walpole 2 station).

How hot do summers get in South Walpole, MA?

The average high peaks at 83 °F in July, with about 13 days a year at 90 °F or more.

What kind of soil does 02071 have?

The USDA soil survey maps Canton at the center of ZIP 02071: slightly decomposed plant material, well drained.

Did spring come early in South Walpole, MA in 2026?

Spring leaf-out near 02071 came on Apr 3 in 2026, 4 days earlier than the 1991–2020 average (Apr 7), according to the USA National Phenology Network Spring Index.

What kind of onions grow in South Walpole, MA?

Long-day onions: the longest day near 02071 is 15 h 15 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 02071 change?

Yes. The 2012 USDA map put 02071 in zone 6a; the 2023 map puts it in zone 6b. The newer map uses 1991–2020 data and more weather stations.