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

Planting zone for 04781 — Wallagrass, ME

ZIP code 04781 (Wallagrass, Aroostook County) is in USDA zone 4a: the coldest winter night averages −30 to −25 °F. The median last spring frost is May 23 and the first fall frost September 24.

Where ZIP 04781 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.

Zone4a−30 to −25 °F

Coldest night−34.4 to −31.7 °C

Last frostMay 23

First frostSep 24

2012 zone3b

Was 3b 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 4a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Wallagrass, ME…

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 Wallagrass, ME

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostMay 23median — 50% chance of a later frost

Safe for tender plantsJune 6only 10% chance of frost after

First fall frostSeptember 24median — 10% chance by Sep 11

Growing season121 daysfrost-free, median

A hard freeze (28 °F) usually ends around May 9 and returns around October 3.

From the NOAA station Ft Kent, ME — 6 miles away, elevation 610 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 04781

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Apr 11 – Apr 25

SpinachSow outdoors · Apr 11 – May 2

Broccoli, cabbageStart indoors · Mar 14 – Mar 28

Broccoli, cabbageTransplant · May 2 – May 16

Onion setsPlant outdoors · Apr 25 – May 9

PotatoesPlant outdoors · May 2 – May 16

LettuceSow outdoors · Apr 25 – May 9

Carrots, beetsSow outdoors · May 2 – May 16

TomatoesStart indoors · Mar 28 – Apr 11

TomatoesTransplant · May 30 – Jun 13

Peppers, eggplantStart indoors · Mar 14 – Mar 28

Peppers, eggplantTransplant · Jun 6 – Jun 20

BeansSow outdoors · May 30 – Jun 13

Sweet cornSow outdoors · May 30 – Jun 13

Cucumbers, squashSow outdoors · May 30 – Jun 13

Fall lettuce, spinachSow outdoors · Jul 30 – Aug 13

GarlicPlant cloves · Sep 10 – Oct 15

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 23) and first fall frost (Sep 24) 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 04781 came on May 3 — 3 days earlier than the 1991–2020 average (May 6).

average
May 62026
May 3

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 Wallagrass, ME

The soil mapped at the center of ZIP 04781 is Thorndike — highly decomposed plant material, somewhat excessively drained.

TextureHighly decomposed plant materialtop layer

DrainageSomewhat excessively drainednatural drainage class

Organic matter53%high

Hydrologic groupDwater soaks in very slowly

Farmland classFarmland of statewide importanceUSDA classification

Map unit: Thorndike channery silt loam, 8 to 15 percent slopes, rocky.

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 04781; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Wallagrass, ME

Summer high76 °Faverage high, July

Winter low−3 °Faverage low, January

Hot days2days a year at 90 °F or more

Freezing nights201nights a year at 32 °F or less

Growing degree days1,431base 50 °F — the season’s usable heat

Longest day15 h 55 mindaylight on June 21

Shortest day8 h 29 mindaylight on December 21

Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)

Precipitation41.6 inper year, rain and melted snow

Snowfall99 inper year; 143 days with snow on the ground

Average high and low, by month

Precipitation by month inches · ❄ = snowfall

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Ft Kent, ME (6 mi away); precipitation: Ft Kent, ME (6 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

047434b

Fort Kent, ME · 6 mi

047444a

Fort Kent Mills, ME · 6 mi

047394a

Eagle Lake, ME · 12 mi

047454b

Frenchville, ME · 13 mi

047794a

Sinclair, ME · 15 mi

047724a

Saint Agatha, ME · 15 mi

047744b

Saint Francis, ME · 19 mi

047564b

Madawaska, ME · 19 mi

Maine planting zones →

Questions about 04781

What planting zone is ZIP code 04781?

ZIP code 04781 (Wallagrass, ME) is in USDA hardiness zone 4a on the 2023 map: the coldest night of an average winter reaches −30 to −25 °F (−34.4 to −31.7 °C).

When is the last frost in Wallagrass, ME?

The median last spring frost (32 °F) near 04781 is May 23; after June 6 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Ft Kent station.

When is the first frost in Wallagrass, ME?

The median first fall frost near 04781 is September 24, giving a median frost-free growing season of 121 days.

When should I plant tomatoes in 04781?

Start tomato seeds indoors around Mar 28 – Apr 11 and set transplants outside around May 30 – Jun 13, one to three weeks after the median last frost.

How much rain and snow does 04781 get?

About 41.6 inches of precipitation a year and 99 inches of snowfall (NOAA 1991–2020 normals, Ft Kent station).

How hot do summers get in Wallagrass, ME?

The average high peaks at 76 °F in July, with about 2 days a year at 90 °F or more.

What kind of soil does 04781 have?

The USDA soil survey maps Thorndike at the center of ZIP 04781: highly decomposed plant material, somewhat excessively drained.

Did spring come early in Wallagrass, ME in 2026?

Spring leaf-out near 04781 came on May 3 in 2026, 3 days earlier than the 1991–2020 average (May 6), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Wallagrass, ME?

Long-day onions: the longest day near 04781 is 15 h 55 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 04781 change?

Yes. The 2012 USDA map put 04781 in zone 3b; the 2023 map puts it in zone 4a. The newer map uses 1991–2020 data and more weather stations.