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

Planting zone for 04360 — Vienna, ME

ZIP code 04360 (Vienna, Kennebec County) is in USDA zone 5a: the coldest winter night averages −20 to −15 °F. The median last spring frost is May 7 and the first fall frost October 2.

Where ZIP 04360 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.

Zone5a−20 to −15 °F

Coldest night−28.9 to −26.1 °C

Last frostMay 7

First frostOct 2

2012 zone4b

Was 4b 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 5a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Vienna, 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 Vienna, ME

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostMay 7median — 50% chance of a later frost

Safe for tender plantsMay 22only 10% chance of frost after

First fall frostOctober 2median — 10% chance by Sep 20

Growing season146 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 26 and returns around October 15.

From the NOAA station New Sharon, ME — 6 miles away, elevation 479 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 04360

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Mar 26 – Apr 9

SpinachSow outdoors · Mar 26 – Apr 16

Broccoli, cabbageStart indoors · Feb 26 – Mar 12

Broccoli, cabbageTransplant · Apr 16 – Apr 30

Onion setsPlant outdoors · Apr 9 – Apr 23

PotatoesPlant outdoors · Apr 16 – Apr 30

LettuceSow outdoors · Apr 9 – Apr 23

Carrots, beetsSow outdoors · Apr 16 – Apr 30

TomatoesStart indoors · Mar 12 – Mar 26

TomatoesTransplant · May 14 – May 28

Peppers, eggplantStart indoors · Feb 26 – Mar 12

Peppers, eggplantTransplant · May 21 – Jun 4

BeansSow outdoors · May 14 – May 28

Sweet cornSow outdoors · May 14 – May 28

Cucumbers, squashSow outdoors · May 14 – May 28

Fall lettuce, spinachSow outdoors · Aug 7 – Aug 21

GarlicPlant cloves · Sep 18 – Oct 23

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 7) and first fall frost (Oct 2) 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 04360 came on Apr 18 — 7 days earlier than the 1991–2020 average (Apr 25).

average
Apr 252026
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 Vienna, ME

The soil mapped at the center of ZIP 04360 is Peru — moderately decomposed plant material, moderately well drained.

TextureModerately decomposed plant materialtop layer

pH4.9strongly acidic; most vegetables like 6.0–7.0

DrainageModerately well drainednatural drainage class

Organic matter80%high

Hydrologic groupC/Dslow when drained; wet otherwise

Farmland classFarmland of local importanceUSDA classification

Map unit: Peru fine sandy loam, 0 to 8 percent slopes, very 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 04360; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Vienna, ME

Summer high79 °Faverage high, July

Winter low7 °Faverage low, January

Hot days3days a year at 90 °F or more

Freezing nights176nights a year at 32 °F or less

Growing degree days1,944base 50 °F — the season’s usable heat

Longest day15 h 33 mindaylight on June 21

Shortest day8 h 49 mindaylight on December 21

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

Precipitation48.9 inper year, rain and melted snow

Snowfall86 inper year; 118 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: New Sharon, ME (6 mi away); precipitation: New Sharon, ME (6 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

049405a

Farmington Falls, ME · 6 mi

049635a

Oakland, ME · 6 mi

049555a

New Sharon, ME · 6 mi

043525b

Mount Vernon, ME · 6 mi

049185a

Belgrade Lakes, ME · 7 mi

049385a

Farmington, ME · 9 mi

043495b

Kents Hill, ME · 9 mi

049175b

Belgrade, ME · 9 mi

Maine planting zones →

Questions about 04360

What planting zone is ZIP code 04360?

ZIP code 04360 (Vienna, ME) is in USDA hardiness zone 5a on the 2023 map: the coldest night of an average winter reaches −20 to −15 °F (−28.9 to −26.1 °C).

When is the last frost in Vienna, ME?

The median last spring frost (32 °F) near 04360 is May 7; after May 22 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, New Sharon station.

When is the first frost in Vienna, ME?

The median first fall frost near 04360 is October 2, giving a median frost-free growing season of 146 days.

When should I plant tomatoes in 04360?

Start tomato seeds indoors around Mar 12 – Mar 26 and set transplants outside around May 14 – May 28, one to three weeks after the median last frost.

How much rain and snow does 04360 get?

About 48.9 inches of precipitation a year and 86 inches of snowfall (NOAA 1991–2020 normals, New Sharon station).

How hot do summers get in Vienna, ME?

The average high peaks at 79 °F in July, with about 3 days a year at 90 °F or more.

What kind of soil does 04360 have?

The USDA soil survey maps Peru at the center of ZIP 04360: moderately decomposed plant material, moderately well drained, pH about 4.9 (strongly acidic).

Did spring come early in Vienna, ME in 2026?

Spring leaf-out near 04360 came on Apr 18 in 2026, 7 days earlier than the 1991–2020 average (Apr 25), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Vienna, ME?

Long-day onions: the longest day near 04360 is 15 h 33 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 04360 change?

Yes. The 2012 USDA map put 04360 in zone 4b; the 2023 map puts it in zone 5a. The newer map uses 1991–2020 data and more weather stations.