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

Planting zone for 01070 — Plainfield, MA

ZIP code 01070 (Plainfield, Hampshire County) is in USDA zone 5b: the coldest winter night averages −15 to −10 °F. The median last spring frost is May 17 and the first fall frost October 1.

Where ZIP 01070 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 17
First frostOct 1
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 Plainfield, 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 Plainfield, MA

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMay 17median — 50% chance of a later frost
Safe for tender plantsMay 30only 10% chance of frost after
First fall frostOctober 1median — 10% chance by Sep 18
Growing season136 daysfrost-free, median

A hard freeze (28 °F) usually ends around May 4 and returns around October 10.

From the NOAA station E Hawley, MA — 5 miles away, elevation 1,647 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 01070

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Apr 5 – Apr 19
SpinachSow outdoors · Apr 5 – Apr 26
Broccoli, cabbageStart indoors · Mar 8 – Mar 22
Broccoli, cabbageTransplant · Apr 26 – May 10
Onion setsPlant outdoors · Apr 19 – May 3
PotatoesPlant outdoors · Apr 26 – May 10
LettuceSow outdoors · Apr 19 – May 3
Carrots, beetsSow outdoors · Apr 26 – May 10
TomatoesStart indoors · Mar 22 – Apr 5
TomatoesTransplant · May 24 – Jun 7
Peppers, eggplantStart indoors · Mar 8 – Mar 22
Peppers, eggplantTransplant · May 31 – Jun 14
BeansSow outdoors · May 24 – Jun 7
Sweet cornSow outdoors · May 24 – Jun 7
Cucumbers, squashSow outdoors · May 24 – Jun 7
Fall lettuce, spinachSow outdoors · Aug 6 – Aug 20
GarlicPlant cloves · Sep 17 – Oct 22
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 17) and first fall frost (Oct 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 01070 came on Apr 12 — 9 days earlier than the 1991–2020 average (Apr 21).

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 5b in Massachusetts

527 plants native to the lower 48 states, recorded in Massachusetts, and rated by the USDA to survive −15 °F or colder — the bottom of zone 5b. 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 104

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 181

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 154

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 °Fawlfruit sedge4 ft · blooms mid spring · low shade tolerance · to −38 °FBailey's sedge2.1 ft · blooms late spring · low shade tolerance · to −33 °Fbeaked spikerush3 ft · blooms late spring · high shade tolerance · to −28 °F

Vines 7

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 honeysuckle16 ft · blooms late summer · low shade tolerance · to −33 °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 Plainfield, MA.

Soil in Plainfield, MA

The soil mapped at the center of ZIP 01070 is Marlow — slightly decomposed plant material, well drained.

TextureSlightly decomposed plant materialtop layer
pH3.5strongly acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter85%high
Hydrologic groupCwater soaks in slowly
Farmland classNot prime farmlandUSDA classification

Map unit: Marlow-Berkshire association, 35 to 60 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 01070; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Plainfield, MA

Summer high75 °Faverage high, July
Winter low9 °Faverage low, January
Hot days0days a year at 90 °F or more
Freezing nights179nights a year at 32 °F or less
Growing degree days1,552base 50 °F — the season’s usable heat
Longest day15 h 18 mindaylight on June 21
Shortest day9 h 03 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation50.3 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 9 °F 28°9° JanFebruary: average high 31 °F, low 11 °F 31°11° FebMarch: average high 39 °F, low 19 °F 39°19° MarApril: average high 51 °F, low 30 °F 51°30° AprMay: average high 63 °F, low 40 °F 63°40° MayJune: average high 70 °F, low 50 °F 70°50° JunJuly: average high 75 °F, low 53 °F 75°53° JulAugust: average high 74 °F, low 52 °F 74°52° AugSeptember: average high 68 °F, low 46 °F 68°46° SepOctober: average high 56 °F, low 35 °F 56°35° OctNovember: average high 45 °F, low 27 °F 45°27° NovDecember: average high 34 °F, low 18 °F 34°18° Dec

Precipitation by month inches

0″1″2″3″4″5″6″January: 3.62 in precipitation 3.6 JanFebruary: 3.17 in precipitation 3.2 FebMarch: 3.74 in precipitation 3.7 MarApril: 4.06 in precipitation 4.1 AprMay: 4.12 in precipitation 4.1 MayJune: 5.13 in precipitation 5.1 JunJuly: 4.29 in precipitation 4.3 JulAugust: 4.18 in precipitation 4.2 AugSeptember: 4.18 in precipitation 4.2 SepOctober: 5.42 in precipitation 5.4 OctNovember: 4.05 in precipitation 4.0 NovDecember: 4.32 in precipitation 4.3 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: E Hawley, MA (5 mi away); precipitation: Plainfield 2, MA (within 1 mile). Daylight is calculated from latitude.

Nearby ZIP codes

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

010265b
Cummington, MA · 3 mi
013305b
Ashfield, MA · 5 mi
012705b
Windsor, MA · 6 mi
013395b
Charlemont, MA · 7 mi
010326a
Goshen, MA · 7 mi
012565b
Savoy, MA · 7 mi
013385b
Buckland, MA · 7 mi
010986a
Worthington, MA · 9 mi

Massachusetts planting zones →

Questions about 01070

What planting zone is ZIP code 01070?

ZIP code 01070 (Plainfield, MA) 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 Plainfield, MA?

The median last spring frost (32 °F) near 01070 is May 17; after May 30 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, E Hawley station.

When is the first frost in Plainfield, MA?

The median first fall frost near 01070 is October 1, giving a median frost-free growing season of 136 days.

When should I plant tomatoes in 01070?

Start tomato seeds indoors around Mar 22 – Apr 5 and set transplants outside around May 24 – Jun 7, one to three weeks after the median last frost.

How much rain and snow does 01070 get?

About 50.3 inches of precipitation a year (NOAA 1991–2020 normals, Plainfield 2 station).

How hot do summers get in Plainfield, MA?

The average high peaks at 75 °F in July, with about 0 days a year at 90 °F or more.

What kind of soil does 01070 have?

The USDA soil survey maps Marlow at the center of ZIP 01070: slightly decomposed plant material, well drained, pH about 3.5 (strongly acidic).

Did spring come early in Plainfield, MA in 2026?

Spring leaf-out near 01070 came on Apr 12 in 2026, 9 days earlier than the 1991–2020 average (Apr 21), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Plainfield, MA?

Long-day onions: the longest day near 01070 is 15 h 18 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).