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

Planting zone for 03902 — Cape Neddick, ME

ZIP code 03902 (Cape Neddick, York 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 14.

Where ZIP 03902 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 14
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 Cape Neddick, 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 Cape Neddick, ME

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 14only 10% chance of frost after
First fall frostOctober 14median — 10% chance by Oct 1
Growing season165 daysfrost-free, median

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

From the NOAA station Cape Neddick, ME — within 1 mile, elevation 151 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 03902

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 19 – Sep 2
GarlicPlant cloves · Sep 30 – Nov 4
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 1) and first fall frost (Oct 14) 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 03902 came on Apr 16 — about the same time as the 1991–2020 average (Apr 16).

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 6a in Maine

502 plants native to the lower 48 states, recorded in Maine, and rated by the USDA to survive −10 °F or colder — the bottom of zone 6a. Each links to its USDA PLANTS profile.

Trees 55

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 101

alderleaf buckthorn3 ft · blooms late spring · low shade tolerance · to −33 °FAllegheny serviceberry35 ft · blooms early spring · low shade tolerance · to −38 °Falpine bearberry0.5 ft · blooms early spring · medium shade tolerance · to −62 °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 °F

Wildflowers & perennials 173

alkali buttercup1 ft · blooms late spring · low shade tolerance · to −38 °Falpine bistort1 ft · blooms mid spring · high shade tolerance · to −38 °Falpine sweetvetch2 ft · blooms early summer · high shade tolerance · to −62 °FAmerican alpine speedwell1 ft · blooms summer · medium shade tolerance · to −28 °FAmerican bur-reed3 ft · blooms indeterminate · medium shade tolerance · to −33 °FAmerican eelgrass1 ft · blooms mid summer · high shade tolerance · to −33 °F

Grasses 154

alpine timothy1.4 ft · blooms late spring · medium shade tolerance · to −43 °FAmerican 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 °F

Vines 6

American bittersweet15 ft · blooms spring · low shade tolerance · to −38 °Fdevil's darning needles15 ft · blooms mid summer · medium shade tolerance · to −38 °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 °FVirginia creeper1 ft · blooms late spring · medium shade tolerance · to −28 °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 Cape Neddick, ME.

Soil in Cape Neddick, ME

The soil mapped at the center of ZIP 03902 is Raynham — silt loam, poorly drained.

TextureSilt loama good balance for most vegetables
pH5.5moderately acidic; most vegetables like 6.0–7.0
DrainagePoorly drainedconsider raised beds
Organic matter6.5%high
Hydrologic groupC/Dslow when drained; wet otherwise
Farmland classNot prime farmlandUSDA classification

Map unit: Raynham silt loam.

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 03902; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Cape Neddick, ME

Summer high79 °Faverage high, July
Winter low14 °Faverage low, January
Hot days2days a year at 90 °F or more
Freezing nights149nights a year at 32 °F or less
Growing degree days2,266base 50 °F — the season’s usable heat
Longest day15 h 23 mindaylight on June 21
Shortest day8 h 59 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation51.6 inper year, rain and melted snow
Snowfall70 inper year; 98 days with snow on the ground

Average high and low, by month

0°10°20°30°40°50°60°70°80°90°32 °FJanuary: average high 32 °F, low 14 °F 32°14° JanFebruary: average high 35 °F, low 16 °F 35°16° FebMarch: average high 42 °F, low 24 °F 42°24° MarApril: average high 56 °F, low 34 °F 56°34° AprMay: average high 66 °F, low 44 °F 66°44° MayJune: average high 74 °F, low 55 °F 74°55° JunJuly: average high 79 °F, low 61 °F 79°61° JulAugust: average high 79 °F, low 59 °F 79°59° AugSeptember: average high 71 °F, low 51 °F 71°51° SepOctober: average high 59 °F, low 40 °F 59°40° OctNovember: average high 48 °F, low 31 °F 48°31° NovDecember: average high 38 °F, low 21 °F 38°21° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″3″4″5″6″January: 3.61 in precipitation, 18.5 in snowfall 3.6❄19 JanFebruary: 3.64 in precipitation, 20.1 in snowfall 3.6❄20 FebMarch: 4.92 in precipitation, 11.6 in snowfall 4.9❄12 MarApril: 4.78 in precipitation, 2.4 in snowfall 4.8❄2 AprMay: 3.93 in precipitation 3.9 MayJune: 4.46 in precipitation 4.5 JunJuly: 3.80 in precipitation 3.8 JulAugust: 3.60 in precipitation 3.6 AugSeptember: 4.30 in precipitation 4.3 SepOctober: 5.35 in precipitation 5.3 OctNovember: 4.30 in precipitation, 1.5 in snowfall 4.3❄2 NovDecember: 4.93 in precipitation, 16 in snowfall 4.9❄16 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Cape Neddick, ME (within 1 mile); precipitation: Cape Neddick, ME (within 1 mile). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 6a.

039076a
Ogunquit, ME · 3 mi
039106a
York Beach, ME · 3 mi
039096a
York, ME · 4 mi
040546a
Moody, ME · 5 mi
039116a
York Harbor, ME · 5 mi
039086a
South Berwick, ME · 6 mi
040906a
Wells, ME · 8 mi
039036a
Eliot, ME · 9 mi

Maine planting zones →

Questions about 03902

What planting zone is ZIP code 03902?

ZIP code 03902 (Cape Neddick, ME) 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 Cape Neddick, ME?

The median last spring frost (32 °F) near 03902 is May 1; after May 14 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Cape Neddick station.

When is the first frost in Cape Neddick, ME?

The median first fall frost near 03902 is October 14, giving a median frost-free growing season of 165 days.

When should I plant tomatoes in 03902?

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 03902 get?

About 51.6 inches of precipitation a year and 70 inches of snowfall (NOAA 1991–2020 normals, Cape Neddick station).

How hot do summers get in Cape Neddick, ME?

The average high peaks at 79 °F in July, with about 2 days a year at 90 °F or more.

What kind of soil does 03902 have?

The USDA soil survey maps Raynham at the center of ZIP 03902: silt loam, poorly drained, pH about 5.5 (moderately acidic).

Did spring come early in Cape Neddick, ME in 2026?

Spring leaf-out near 03902 came on Apr 16 in 2026, about the same as the 1991–2020 average (Apr 16), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Cape Neddick, ME?

Long-day onions: the longest day near 03902 is 15 h 23 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 03902 change?

Yes. The 2012 USDA map put 03902 in zone 5b; the 2023 map puts it in zone 6a. The newer map uses 1991–2020 data and more weather stations.