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

Planting zone for 02134 — Allston, MA

ZIP code 02134 (Allston, Suffolk County) is in USDA zone 6b: the coldest winter night averages −5 to 0 °F. The median last spring frost is April 19 and the first fall frost October 23.

Where ZIP 02134 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 19
First frostOct 23
2012 zone6b

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 6b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Allston, 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 Allston, MA

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 19median — 50% chance of a later frost
Safe for tender plantsMay 3only 10% chance of frost after
First fall frostOctober 23median — 10% chance by Oct 8
Growing season185 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 5 and returns around November 3.

From the NOAA station Jamaica Plain, MA — 4 miles away, elevation 95 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 02134

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 8 – Mar 22
SpinachSow outdoors · Mar 8 – Mar 29
Broccoli, cabbageStart indoors · Feb 8 – Feb 22
Broccoli, cabbageTransplant · Mar 29 – Apr 12
Onion setsPlant outdoors · Mar 22 – Apr 5
PotatoesPlant outdoors · Mar 29 – Apr 12
LettuceSow outdoors · Mar 22 – Apr 5
Carrots, beetsSow outdoors · Mar 29 – Apr 12
TomatoesStart indoors · Feb 22 – Mar 8
TomatoesTransplant · Apr 26 – May 10
Peppers, eggplantStart indoors · Feb 8 – Feb 22
Peppers, eggplantTransplant · May 3 – May 17
BeansSow outdoors · Apr 26 – May 10
Sweet cornSow outdoors · Apr 26 – May 10
Cucumbers, squashSow outdoors · Apr 26 – May 10
Fall lettuce, spinachSow outdoors · Aug 28 – Sep 11
GarlicPlant cloves · Oct 9 – Nov 13
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 19) and first fall frost (Oct 23) 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 02134 came on Apr 1 — 4 days earlier than 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).

Soil in Allston, MA

The center of ZIP 02134 is mapped as Urban land, 0 to 15 percent slopes: built-over ground without natural soil data. Garden soil here is usually imported or disturbed — test before you plant.

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 02134; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Allston, MA

Summer high85 °Faverage high, July
Winter low19 °Faverage low, January
Hot days20days a year at 90 °F or more
Freezing nights121nights a year at 32 °F or less
Growing degree days3,047base 50 °F — the season’s usable heat
Longest day15 h 17 mindaylight on June 21
Shortest day9 h 04 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation49.3 inper year, rain and melted snow

Average high and low, by month

10°20°30°40°50°60°70°80°90°100°32 °FJanuary: average high 37 °F, low 19 °F 37°19° 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 69 °F, low 48 °F 69°48° MayJune: average high 79 °F, low 58 °F 79°58° JunJuly: average high 85 °F, low 64 °F 85°64° JulAugust: average high 83 °F, low 63 °F 83°63° AugSeptember: average high 76 °F, low 55 °F 76°55° SepOctober: average high 64 °F, low 43 °F 64°43° OctNovember: average high 53 °F, low 34 °F 53°34° NovDecember: average high 42 °F, low 26 °F 42°26° Dec

Precipitation by month inches

0″1″2″3″4″5″January: 3.72 in precipitation 3.7 JanFebruary: 3.74 in precipitation 3.7 FebMarch: 4.52 in precipitation 4.5 MarApril: 4.37 in precipitation 4.4 AprMay: 3.66 in precipitation 3.7 MayJune: 4.38 in precipitation 4.4 JunJuly: 3.46 in precipitation 3.5 JulAugust: 3.72 in precipitation 3.7 AugSeptember: 3.92 in precipitation 3.9 SepOctober: 4.78 in precipitation 4.8 OctNovember: 4.05 in precipitation 4.0 NovDecember: 4.97 in precipitation 5.0 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Jamaica Plain, MA (4 mi away); precipitation: Cambridge 0.9 Nnw, MA (2 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 6b.

021636b
Boston, MA · <1 mi
024466b
Brookline, MA · 1 mi
021356b
Brighton, MA · 1 mi
021396b
Cambridge, MA · 1 mi
021386b
Cambridge, MA · 1 mi
022156b
Boston, MA · 2 mi
022386b
Cambridge, MA · 2 mi
024476b
Brookline Village, MA · 2 mi

Massachusetts planting zones →

Questions about 02134

What planting zone is ZIP code 02134?

ZIP code 02134 (Allston, 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 Allston, MA?

The median last spring frost (32 °F) near 02134 is April 19; after May 3 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Jamaica Plain station.

When is the first frost in Allston, MA?

The median first fall frost near 02134 is October 23, giving a median frost-free growing season of 185 days.

When should I plant tomatoes in 02134?

Start tomato seeds indoors around Feb 22 – Mar 8 and set transplants outside around Apr 26 – May 10, one to three weeks after the median last frost.

How much rain and snow does 02134 get?

About 49.3 inches of precipitation a year (NOAA 1991–2020 normals, Cambridge 0.9 Nnw station).

How hot do summers get in Allston, MA?

The average high peaks at 85 °F in July, with about 20 days a year at 90 °F or more.

Did spring come early in Allston, MA in 2026?

Spring leaf-out near 02134 came on Apr 1 in 2026, 4 days earlier than the 1991–2020 average (Apr 5), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Allston, MA?

Long-day onions: the longest day near 02134 is 15 h 17 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).