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

Planting zone for 49947 — Marenisco, MI

ZIP code 49947 (Marenisco, Gogebic County) is in USDA zone 4a: the coldest winter night averages −30 to −25 °F. The median last spring frost is May 26 and the first fall frost September 27.

Where ZIP 49947 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 26
First frostSep 27
2012 zone4a

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 4a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Marenisco, 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 Marenisco, MI

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMay 26median — 50% chance of a later frost
Safe for tender plantsJune 8only 10% chance of frost after
First fall frostSeptember 27median — 10% chance by Sep 10
Growing season123 daysfrost-free, median

A hard freeze (28 °F) usually ends around May 12 and returns around October 7.

From the NOAA station Bergland Dam, MI — 12 miles away, elevation 1,299 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 49947

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Apr 14 – Apr 28
SpinachSow outdoors · Apr 14 – May 5
Broccoli, cabbageStart indoors · Mar 17 – Mar 31
Broccoli, cabbageTransplant · May 5 – May 19
Onion setsPlant outdoors · Apr 28 – May 12
PotatoesPlant outdoors · May 5 – May 19
LettuceSow outdoors · Apr 28 – May 12
Carrots, beetsSow outdoors · May 5 – May 19
TomatoesStart indoors · Mar 31 – Apr 14
TomatoesTransplant · Jun 2 – Jun 16
Peppers, eggplantStart indoors · Mar 17 – Mar 31
Peppers, eggplantTransplant · Jun 9 – Jun 23
BeansSow outdoors · Jun 2 – Jun 16
Sweet cornSow outdoors · Jun 2 – Jun 16
Cucumbers, squashSow outdoors · Jun 2 – Jun 16
Fall lettuce, spinachSow outdoors · Aug 2 – Aug 16
GarlicPlant cloves · Sep 13 – Oct 18
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 26) and first fall frost (Sep 27) 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 49947 came on Apr 24 — 5 days earlier than the 1991–2020 average (Apr 29).

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 4a in Michigan

443 plants native to the lower 48 states, recorded in Michigan, and rated by the USDA to survive −30 °F or colder — the bottom of zone 4a. Each links to its USDA PLANTS profile.

Trees 48

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 78

alderleaf buckthorn3 ft · blooms late spring · low shade tolerance · to −33 °FAllegheny serviceberry35 ft · blooms early spring · low shade tolerance · to −38 °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 °FAmerican hornbeam30 ft · blooms mid spring · low shade tolerance · to −34 °F

Wildflowers & perennials 168

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 bur-reed3 ft · blooms indeterminate · medium shade tolerance · to −33 °FAmerican eelgrass1 ft · blooms mid summer · high shade tolerance · to −33 °FAmerican lotus3 ft · blooms mid summer · high shade tolerance · to −36 °F

Grasses 136

alpine timothy1.4 ft · blooms late spring · medium shade tolerance · to −43 °Farctic brome3 ft · blooms early summer · low shade tolerance · to −33 °Fawlfruit sedge4 ft · blooms mid spring · low shade tolerance · to −38 °Fbeaked sedge4 ft · blooms late spring · low shade tolerance · to −38 °FBebb's sedge3 ft · blooms late spring · low shade tolerance · to −38 °FBicknell's sedge3 ft · blooms late spring · low shade tolerance · to −38 °F

Vines 4

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 °Ftrumpet honeysuckle16 ft · blooms late summer · low shade tolerance · to −33 °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 Marenisco, MI.

Soil in Marenisco, MI

The soil mapped at the center of ZIP 49947 is Gogebic — moderately decomposed plant material, moderately well drained.

TextureModerately decomposed plant materialtop layer
DrainageModerately well drainednatural drainage class
Organic matter75%high
Hydrologic groupDwater soaks in very slowly
Farmland classNot prime farmlandUSDA classification

Map unit: Gogebic fine sandy loam, 6 to 18 percent slopes, 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 49947; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Marenisco, MI

Summer high78 °Faverage high, July
Winter low2 °Faverage low, February
Hot days2days a year at 90 °F or more
Freezing nights202nights a year at 32 °F or less
Growing degree days1,649base 50 °F — the season’s usable heat
Longest day15 h 49 mindaylight on June 21
Shortest day8 h 35 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation42.6 inper year, rain and melted snow
Snowfall180 inper year; 159 days with snow on the ground

Average high and low, by month

−10°0°10°20°30°40°50°60°70°80°90°32 °FJanuary: average high 21 °F, low 3 °F 21°3° JanFebruary: average high 25 °F, low 2 °F 25°2° FebMarch: average high 36 °F, low 11 °F 36°11° MarApril: average high 49 °F, low 25 °F 49°25° AprMay: average high 64 °F, low 38 °F 64°38° MayJune: average high 74 °F, low 48 °F 74°48° JunJuly: average high 78 °F, low 53 °F 78°53° JulAugust: average high 76 °F, low 51 °F 76°51° AugSeptember: average high 68 °F, low 44 °F 68°44° SepOctober: average high 54 °F, low 33 °F 54°33° OctNovember: average high 38 °F, low 23 °F 38°23° NovDecember: average high 26 °F, low 11 °F 26°11° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″3″4″5″January: 3.42 in precipitation, 41.6 in snowfall 3.4❄42 JanFebruary: 2.48 in precipitation, 27.7 in snowfall 2.5❄28 FebMarch: 2.68 in precipitation, 22.4 in snowfall 2.7❄22 MarApril: 3.46 in precipitation, 13.8 in snowfall 3.5❄14 AprMay: 3.67 in precipitation, 1.6 in snowfall 3.7❄2 MayJune: 3.74 in precipitation 3.7 JunJuly: 3.95 in precipitation 4.0 JulAugust: 3.56 in precipitation 3.6 AugSeptember: 3.75 in precipitation, 0.2 in snowfall 3.8 SepOctober: 4.42 in precipitation, 5 in snowfall 4.4❄5 OctNovember: 3.68 in precipitation, 28.2 in snowfall 3.7❄28 NovDecember: 3.80 in precipitation, 39.5 in snowfall 3.8❄40 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Bergland Dam, MI (12 mi away); precipitation: Bergland Dam, MI (12 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.

499254b
Ewen, MI · 14 mi
499684a
Wakefield, MI · 15 mi
499104b
Bergland, MI · 15 mi
545574a
Presque Isle, WI · 15 mi
499594a
Ramsay, MI · 19 mi
499714b
White Pine, MI · 21 mi
545404a
Land O Lakes, WI · 21 mi
545124a
Boulder Junction, WI · 22 mi

Michigan planting zones →

Questions about 49947

What planting zone is ZIP code 49947?

ZIP code 49947 (Marenisco, MI) 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 Marenisco, MI?

The median last spring frost (32 °F) near 49947 is May 26; after June 8 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Bergland Dam station.

When is the first frost in Marenisco, MI?

The median first fall frost near 49947 is September 27, giving a median frost-free growing season of 123 days.

When should I plant tomatoes in 49947?

Start tomato seeds indoors around Mar 31 – Apr 14 and set transplants outside around Jun 2 – Jun 16, one to three weeks after the median last frost.

How much rain and snow does 49947 get?

About 42.6 inches of precipitation a year and 180 inches of snowfall (NOAA 1991–2020 normals, Bergland Dam station).

How hot do summers get in Marenisco, MI?

The average high peaks at 78 °F in July, with about 2 days a year at 90 °F or more.

What kind of soil does 49947 have?

The USDA soil survey maps Gogebic at the center of ZIP 49947: moderately decomposed plant material, moderately well drained.

Did spring come early in Marenisco, MI in 2026?

Spring leaf-out near 49947 came on Apr 24 in 2026, 5 days earlier than the 1991–2020 average (Apr 29), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Marenisco, MI?

Long-day onions: the longest day near 49947 is 15 h 49 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).