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

Planting zone for 01341 — Conway, MA

ZIP code 01341 (Conway, Franklin County) is in USDA zone 6a: the coldest winter night averages −10 to −5 °F. The median last spring frost is May 1 and the first fall frost October 11.

Where ZIP 01341 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.

Zone6a−10 to −5 °F
Coldest night−23.3 to −20.6 °C
Last frostMay 1
First frostOct 11
2012 zone5b

Was 5b 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 6a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Conway, 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 Conway, MA

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMay 1median — 50% chance of a later frost
Safe for tender plantsMay 15only 10% chance of frost after
First fall frostOctober 11median — 10% chance by Sep 29
Growing season162 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 18 and returns around October 25.

From the NOAA station Greenfield #3, MA — 7 miles away, elevation 131 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 01341

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 20 – Apr 3
SpinachSow outdoors · Mar 20 – Apr 10
Broccoli, cabbageStart indoors · Feb 20 – Mar 6
Broccoli, cabbageTransplant · Apr 10 – Apr 24
Onion setsPlant outdoors · Apr 3 – Apr 17
PotatoesPlant outdoors · Apr 10 – Apr 24
LettuceSow outdoors · Apr 3 – Apr 17
Carrots, beetsSow outdoors · Apr 10 – Apr 24
TomatoesStart indoors · Mar 6 – Mar 20
TomatoesTransplant · May 8 – May 22
Peppers, eggplantStart indoors · Feb 20 – Mar 6
Peppers, eggplantTransplant · May 15 – May 29
BeansSow outdoors · May 8 – May 22
Sweet cornSow outdoors · May 8 – May 22
Cucumbers, squashSow outdoors · May 8 – May 22
Fall lettuce, spinachSow outdoors · Aug 16 – Aug 30
GarlicPlant cloves · Sep 27 – Nov 1
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 1) and first fall frost (Oct 11) 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 01341 came on Apr 12 — 6 days earlier than the 1991–2020 average (Apr 18).

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 Conway, MA

The soil mapped at the center of ZIP 01341 is Poocham — moderately decomposed plant material, well drained.

TextureModerately decomposed plant materialtop layer
DrainageWell drainednatural drainage class
Organic matter85%high
Hydrologic groupCwater soaks in slowly
Farmland classNot prime farmlandUSDA classification

Map unit: Poocham silt loam, 25 to 60 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 01341; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Conway, MA

Summer high83 °Faverage high, July
Winter low14 °Faverage low, February
Hot days10days a year at 90 °F or more
Freezing nights154nights a year at 32 °F or less
Growing degree days2,526base 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)
Precipitation51.4 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 33 °F, low 15 °F 33°15° JanFebruary: average high 37 °F, low 14 °F 37°14° FebMarch: average high 45 °F, low 23 °F 45°23° MarApril: average high 59 °F, low 34 °F 59°34° AprMay: average high 70 °F, low 45 °F 70°45° MayJune: average high 78 °F, low 54 °F 78°54° JunJuly: average high 83 °F, low 59 °F 83°59° JulAugust: average high 81 °F, low 57 °F 81°57° AugSeptember: average high 74 °F, low 50 °F 74°50° SepOctober: average high 62 °F, low 39 °F 62°39° OctNovember: average high 50 °F, low 29 °F 50°29° NovDecember: average high 40 °F, low 21 °F 40°21° Dec

Precipitation by month inches

0″1″2″3″4″5″6″January: 3.72 in precipitation 3.7 JanFebruary: 3.37 in precipitation 3.4 FebMarch: 3.70 in precipitation 3.7 MarApril: 3.99 in precipitation 4.0 AprMay: 4.14 in precipitation 4.1 MayJune: 4.56 in precipitation 4.6 JunJuly: 4.32 in precipitation 4.3 JulAugust: 4.45 in precipitation 4.5 AugSeptember: 4.98 in precipitation 5.0 SepOctober: 5.52 in precipitation 5.5 OctNovember: 3.81 in precipitation 3.8 NovDecember: 4.88 in precipitation 4.9 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Greenfield #3, MA (7 mi away); precipitation: Conway 0.9 Sw, 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.

013026a
Greenfield, MA · 4 mi
013736a
South Deerfield, MA · 5 mi
010936a
Whately, MA · 5 mi
013426a
Deerfield, MA · 5 mi
013705b
Shelburne Falls, MA · 6 mi
013305b
Ashfield, MA · 6 mi
010396a
Haydenville, MA · 7 mi
010326a
Goshen, MA · 7 mi

Massachusetts planting zones →

Questions about 01341

What planting zone is ZIP code 01341?

ZIP code 01341 (Conway, MA) is in USDA hardiness zone 6a on the 2023 map: the coldest night of an average winter reaches −10 to −5 °F (−23.3 to −20.6 °C).

When is the last frost in Conway, MA?

The median last spring frost (32 °F) near 01341 is May 1; after May 15 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Greenfield #3 station.

When is the first frost in Conway, MA?

The median first fall frost near 01341 is October 11, giving a median frost-free growing season of 162 days.

When should I plant tomatoes in 01341?

Start tomato seeds indoors around Mar 6 – Mar 20 and set transplants outside around May 8 – May 22, one to three weeks after the median last frost.

How much rain and snow does 01341 get?

About 51.4 inches of precipitation a year (NOAA 1991–2020 normals, Conway 0.9 Sw station).

How hot do summers get in Conway, MA?

The average high peaks at 83 °F in July, with about 10 days a year at 90 °F or more.

What kind of soil does 01341 have?

The USDA soil survey maps Poocham at the center of ZIP 01341: moderately decomposed plant material, well drained.

Did spring come early in Conway, MA in 2026?

Spring leaf-out near 01341 came on Apr 12 in 2026, 6 days earlier than the 1991–2020 average (Apr 18), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Conway, MA?

Long-day onions: the longest day near 01341 is 15 h 18 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 01341 change?

Yes. The 2012 USDA map put 01341 in zone 5b; the 2023 map puts it in zone 6a. The newer map uses 1991–2020 data and more weather stations.