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

Planting zone for 55387 — Waconia, MN

ZIP code 55387 (Waconia, Carver County) is in USDA zone 4b: the coldest winter night averages −25 to −20 °F. The median last spring frost is May 5 and the first fall frost October 5.

Where ZIP 55387 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.

Zone4b−25 to −20 °F

Coldest night−31.7 to −28.9 °C

Last frostMay 5

First frostOct 5

2012 zone4b

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 4b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Waconia, MN…

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 Waconia, MN

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostMay 5median — 50% chance of a later frost

Safe for tender plantsMay 19only 10% chance of frost after

First fall frostOctober 5median — 10% chance by Sep 22

Growing season151 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 23 and returns around October 16.

From the NOAA station Chaska 2nw, MN — 8 miles away, elevation 922 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 55387

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Mar 24 – Apr 7

SpinachSow outdoors · Mar 24 – Apr 14

Broccoli, cabbageStart indoors · Feb 24 – Mar 10

Broccoli, cabbageTransplant · Apr 14 – Apr 28

Onion setsPlant outdoors · Apr 7 – Apr 21

PotatoesPlant outdoors · Apr 14 – Apr 28

LettuceSow outdoors · Apr 7 – Apr 21

Carrots, beetsSow outdoors · Apr 14 – Apr 28

TomatoesStart indoors · Mar 10 – Mar 24

TomatoesTransplant · May 12 – May 26

Peppers, eggplantStart indoors · Feb 24 – Mar 10

Peppers, eggplantTransplant · May 19 – Jun 2

BeansSow outdoors · May 12 – May 26

Sweet cornSow outdoors · May 12 – May 26

Cucumbers, squashSow outdoors · May 12 – May 26

Fall lettuce, spinachSow outdoors · Aug 10 – Aug 24

GarlicPlant cloves · Sep 21 – Oct 26

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 5) and first fall frost (Oct 5) 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 55387 came on Apr 11 — 6 days earlier than the 1991–2020 average (Apr 17).

average
Apr 172026
Apr 11

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 Waconia, MN

The soil mapped at the center of ZIP 55387 is Lester — loam, well drained.

TextureLoama good balance for most vegetables

pH6.6neutral; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter3%moderate

Hydrologic groupCwater soaks in slowly

Farmland classFarmland of statewide importanceUSDA classification

Map unit: Lester loam, 6 to 10 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 55387; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Waconia, MN

Summer high83 °Faverage high, July

Winter low4 °Faverage low, January

Hot days11days a year at 90 °F or more

Freezing nights161nights a year at 32 °F or less

Growing degree days2,486base 50 °F — the season’s usable heat

Longest day15 h 36 mindaylight on June 21

Shortest day8 h 47 mindaylight on December 21

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

Precipitation33.1 inper year, rain and melted snow

Average high and low, by month

Precipitation by month inches

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Chaska 2nw, MN (8 mi away); precipitation: Victoria 1.6 Wsw, MN (5 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 4b.

553754b

Saint Bonifacius, MN · 4 mi

Young America, MN · 8 mi

Minnesota planting zones →

Questions about 55387

What planting zone is ZIP code 55387?

ZIP code 55387 (Waconia, MN) is in USDA hardiness zone 4b on the 2023 map: the coldest night of an average winter reaches −25 to −20 °F (−31.7 to −28.9 °C).

When is the last frost in Waconia, MN?

The median last spring frost (32 °F) near 55387 is May 5; after May 19 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Chaska 2nw station.

When is the first frost in Waconia, MN?

The median first fall frost near 55387 is October 5, giving a median frost-free growing season of 151 days.

When should I plant tomatoes in 55387?

Start tomato seeds indoors around Mar 10 – Mar 24 and set transplants outside around May 12 – May 26, one to three weeks after the median last frost.

How much rain and snow does 55387 get?

About 33.1 inches of precipitation a year (NOAA 1991–2020 normals, Victoria 1.6 Wsw station).

How hot do summers get in Waconia, MN?

The average high peaks at 83 °F in July, with about 11 days a year at 90 °F or more.

What kind of soil does 55387 have?

The USDA soil survey maps Lester at the center of ZIP 55387: loam, well drained, pH about 6.6 (neutral).

Did spring come early in Waconia, MN in 2026?

Spring leaf-out near 55387 came on Apr 11 in 2026, 6 days earlier than the 1991–2020 average (Apr 17), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Waconia, MN?

Long-day onions: the longest day near 55387 is 15 h 36 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).