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

Planting zone for 49762 — Naubinway, MI

ZIP code 49762 (Naubinway, Mackinac County) is in USDA zone 5a: the coldest winter night averages −20 to −15 °F. The median last spring frost is May 21 and the first fall frost October 1.

Where ZIP 49762 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 21

First frostOct 1

2012 zone5a

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 5a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Naubinway, MI…

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 Naubinway, MI

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostMay 21median — 50% chance of a later frost

Safe for tender plantsJune 5only 10% chance of frost after

First fall frostOctober 1median — 10% chance by Sep 14

Growing season131 daysfrost-free, median

A hard freeze (28 °F) usually ends around May 6 and returns around October 13.

From the NOAA station Trout Lake 1sw, MI — 13 miles away, elevation 824 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 49762

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Apr 9 – Apr 23

SpinachSow outdoors · Apr 9 – Apr 30

Broccoli, cabbageStart indoors · Mar 12 – Mar 26

Broccoli, cabbageTransplant · Apr 30 – May 14

Onion setsPlant outdoors · Apr 23 – May 7

PotatoesPlant outdoors · Apr 30 – May 14

LettuceSow outdoors · Apr 23 – May 7

Carrots, beetsSow outdoors · Apr 30 – May 14

TomatoesStart indoors · Mar 26 – Apr 9

TomatoesTransplant · May 28 – Jun 11

Peppers, eggplantStart indoors · Mar 12 – Mar 26

Peppers, eggplantTransplant · Jun 4 – Jun 18

BeansSow outdoors · May 28 – Jun 11

Sweet cornSow outdoors · May 28 – Jun 11

Cucumbers, squashSow outdoors · May 28 – Jun 11

Fall lettuce, spinachSow outdoors · Aug 6 – Aug 20

GarlicPlant cloves · Sep 17 – Oct 22

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 21) and first fall frost (Oct 1) 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 49762 came on May 4 — 3 days later than the 1991–2020 average (May 1).

average
May 12026
May 4

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 5a in Michigan

551 plants native to the lower 48 states, recorded in Michigan, and rated by the USDA to survive −20 °F or colder — the bottom of zone 5a. Each links to its USDA PLANTS profile.

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 Naubinway, MI.

Soil in Naubinway, MI

The soil mapped at the center of ZIP 49762 is Caffey — muck, poorly drained.

TextureMucktop layer

pH6.6neutral; most vegetables like 6.0–7.0

DrainagePoorly drainedconsider raised beds

Organic matter75%high

Hydrologic groupA/Ddrains fast once dried out; wet otherwise

Farmland classNot prime farmlandUSDA classification

Map unit: Caffey-Ingalls-Iosco complex, 0 to 6 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 49762; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Naubinway, MI

Summer high77 °Faverage high, July

Winter low9 °Faverage low, January

Hot days1days a year at 90 °F or more

Freezing nights182nights a year at 32 °F or less

Growing degree days1,750base 50 °F — the season’s usable heat

Longest day15 h 46 mindaylight on June 21

Shortest day8 h 37 mindaylight on December 21

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

Precipitation33.5 inper year, rain and melted snow

Snowfall99 inper year; 116 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: Trout Lake 1sw, MI (13 mi away); precipitation: Trout Lake 1sw, MI (13 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

498275a

Engadine, MI · 13 mi

497935a

Trout Lake, MI · 13 mi

Gould City, MI · 22 mi

497815b

Saint Ignace, MI · 27 mi

Michigan planting zones →

Questions about 49762

What planting zone is ZIP code 49762?

ZIP code 49762 (Naubinway, MI) 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 Naubinway, MI?

The median last spring frost (32 °F) near 49762 is May 21; after June 5 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Trout Lake 1sw station.

When is the first frost in Naubinway, MI?

The median first fall frost near 49762 is October 1, giving a median frost-free growing season of 131 days.

When should I plant tomatoes in 49762?

Start tomato seeds indoors around Mar 26 – Apr 9 and set transplants outside around May 28 – Jun 11, one to three weeks after the median last frost.

How much rain and snow does 49762 get?

About 33.5 inches of precipitation a year and 99 inches of snowfall (NOAA 1991–2020 normals, Trout Lake 1sw station).

How hot do summers get in Naubinway, MI?

The average high peaks at 77 °F in July, with about 1 days a year at 90 °F or more.

What kind of soil does 49762 have?

The USDA soil survey maps Caffey at the center of ZIP 49762: muck, poorly drained, pH about 6.6 (neutral).

Did spring come early in Naubinway, MI in 2026?

Spring leaf-out near 49762 came on May 4 in 2026, 3 days later than the 1991–2020 average (May 1), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Naubinway, MI?

Long-day onions: the longest day near 49762 is 15 h 46 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).