Data: 2023 USDA zones (PRISM/OSU) · NOAA 1991–2020 normals · updated Oct 29, 2026

Planting zone for 02047 — Humarock, MA

ZIP code 02047 (Humarock, Plymouth County) is in USDA zone 7a: the coldest winter night averages 0 to 5 °F. The median last spring frost is April 15 and the first fall frost November 1.

Where ZIP 02047 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 15

First frostNov 1

2012 zone6b

Was 6b 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 7a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Humarock, 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 Humarock, MA

JanFebMarAprMayJunJulAugSepOctNovDec

Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free

Last spring frostApril 15median — 50% chance of a later frost

Safe for tender plantsApril 28only 10% chance of frost after

First fall frostNovember 1median — 10% chance by Oct 17

Growing season198 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 3 and returns around November 13.

From the NOAA station Plymouth-Kingston, MA — 11 miles away, elevation 46 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 02047

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Mar 4 – Mar 18

SpinachSow outdoors · Mar 4 – Mar 25

Broccoli, cabbageStart indoors · Feb 4 – Feb 18

Broccoli, cabbageTransplant · Mar 25 – Apr 8

Onion setsPlant outdoors · Mar 18 – Apr 1

PotatoesPlant outdoors · Mar 25 – Apr 8

LettuceSow outdoors · Mar 18 – Apr 1

Carrots, beetsSow outdoors · Mar 25 – Apr 8

TomatoesStart indoors · Feb 18 – Mar 4

TomatoesTransplant · Apr 22 – May 6

Peppers, eggplantStart indoors · Feb 4 – Feb 18

Peppers, eggplantTransplant · Apr 29 – May 13

BeansSow outdoors · Apr 22 – May 6

Sweet cornSow outdoors · Apr 22 – May 6

Cucumbers, squashSow outdoors · Apr 22 – May 6

Fall lettuce, spinachSow outdoors · Sep 6 – Sep 20

GarlicPlant cloves · Oct 18 – Nov 22

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 15) and first fall frost (Nov 1) 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 02047 came on Apr 2 — 3 days earlier than the 1991–2020 average (Apr 5).

average
Apr 52026
Apr 2

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 Humarock, MA

The soil mapped at the center of ZIP 02047 is Hooksan — sand, excessively drained. Much of the area is built over (urban land); this is the natural soil underneath.

TextureSanddrains and warms fast; dries out and needs more feeding

pH5.8moderately acidic; most vegetables like 6.0–7.0

DrainageExcessively drainednatural drainage class

Organic matter0.08%low — add compost

Hydrologic groupAwater soaks in fast

Farmland classNot prime farmlandUSDA classification

Map unit: Urban land-Hooksan complex, 0 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 02047; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Humarock, MA

Summer high84 °Faverage high, July

Winter low22 °Faverage low, January

Hot days12days a year at 90 °F or more

Freezing nights120nights a year at 32 °F or less

Growing degree days3,094base 50 °F — the season’s usable heat

Longest day15 h 16 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)

Precipitation52.7 inper year, rain and melted snow

Average high and low, by month

Precipitation by month inches

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Plymouth-Kingston, MA (11 mi away); precipitation: Kingston 3.3 Wnw, MA (10 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.

020517a

Marshfield Hills, MA · 2 mi

020507a

Marshfield, MA · 2 mi

020407a

Greenbush, MA · 4 mi

020597a

North Marshfield, MA · 4 mi

020657a

Ocean Bluff, MA · 4 mi

020667a

Scituate, MA · 5 mi

020417a

Green Harbor, MA · 6 mi

023586b

North Pembroke, MA · 6 mi

Massachusetts planting zones →

Questions about 02047

What planting zone is ZIP code 02047?

ZIP code 02047 (Humarock, 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 Humarock, MA?

The median last spring frost (32 °F) near 02047 is April 15; after April 28 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Plymouth-Kingston station.

When is the first frost in Humarock, MA?

The median first fall frost near 02047 is November 1, giving a median frost-free growing season of 198 days.

When should I plant tomatoes in 02047?

Start tomato seeds indoors around Feb 18 – Mar 4 and set transplants outside around Apr 22 – May 6, one to three weeks after the median last frost.

How much rain and snow does 02047 get?

About 52.7 inches of precipitation a year (NOAA 1991–2020 normals, Kingston 3.3 Wnw station).

How hot do summers get in Humarock, MA?

The average high peaks at 84 °F in July, with about 12 days a year at 90 °F or more.

What kind of soil does 02047 have?

The USDA soil survey maps Hooksan at the center of ZIP 02047: sand, excessively drained, pH about 5.8 (moderately acidic).

Did spring come early in Humarock, MA in 2026?

Spring leaf-out near 02047 came on Apr 2 in 2026, 3 days earlier than the 1991–2020 average (Apr 5), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Humarock, MA?

Long-day onions: the longest day near 02047 is 15 h 16 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 02047 change?

Yes. The 2012 USDA map put 02047 in zone 6b; the 2023 map puts it in zone 7a. The newer map uses 1991–2020 data and more weather stations.