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

Planting zone for 49021 — Bellevue, MI

ZIP code 49021 (Bellevue, Eaton County) is in USDA zone 6a: the coldest winter night averages −10 to −5 °F. The median last spring frost is May 6 and the first fall frost October 12.

Where ZIP 49021 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 6
First frostOct 12
2012 zone6a

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 6a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Bellevue, 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 Bellevue, MI

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMay 6median — 50% chance of a later frost
Safe for tender plantsMay 23only 10% chance of frost after
First fall frostOctober 12median — 10% chance by Sep 26
Growing season158 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 26 and returns around October 25.

From the NOAA station Battle Creek 5nw, MI — 12 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 49021

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 25 – Apr 8
SpinachSow outdoors · Mar 25 – Apr 15
Broccoli, cabbageStart indoors · Feb 25 – Mar 11
Broccoli, cabbageTransplant · Apr 15 – Apr 29
Onion setsPlant outdoors · Apr 8 – Apr 22
PotatoesPlant outdoors · Apr 15 – Apr 29
LettuceSow outdoors · Apr 8 – Apr 22
Carrots, beetsSow outdoors · Apr 15 – Apr 29
TomatoesStart indoors · Mar 11 – Mar 25
TomatoesTransplant · May 13 – May 27
Peppers, eggplantStart indoors · Feb 25 – Mar 11
Peppers, eggplantTransplant · May 20 – Jun 3
BeansSow outdoors · May 13 – May 27
Sweet cornSow outdoors · May 13 – May 27
Cucumbers, squashSow outdoors · May 13 – May 27
Fall lettuce, spinachSow outdoors · Aug 17 – Aug 31
GarlicPlant cloves · Sep 28 – Nov 2
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 6) and first fall frost (Oct 12) 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 49021 came on Mar 30 — 10 days earlier than the 1991–2020 average (Apr 9).

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 Michigan

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

Trees 58

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 105

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 220

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 174

alpine timothy1.4 ft · blooms late spring · medium shade tolerance · to −43 °FAmerican beachgrass2.5 ft · blooms spring · high shade tolerance · to −28 °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 °Fbeaked spikerush3 ft · blooms late spring · high shade tolerance · to −28 °F

Vines 8

American bittersweet15 ft · blooms spring · low shade tolerance · to −38 °Fdevil's darning needles15 ft · blooms mid summer · medium shade tolerance · to −38 °Ffrost grape83 ft · blooms late spring · medium shade tolerance · to −23 °Friverbank grape45 ft · blooms late spring · medium shade tolerance · to −33 °Fsummer grape30 ft · blooms late spring · low shade tolerance · to −23 °Ftrumpet creeper2 ft · blooms summer · high shade tolerance · to −13 °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 Bellevue, MI.

Soil in Bellevue, MI

The soil mapped at the center of ZIP 49021 is Owosso — sandy loam, well drained.

TextureSandy loamdrains and warms fast; dries out and needs more feeding
pH5.8moderately acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter1.5%low — add compost
Hydrologic groupCwater soaks in slowly
Farmland classFarmland of local importanceUSDA classification

Map unit: Owosso-Marlette sandy loams, 12 to 18 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 49021; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Bellevue, MI

Summer high83 °Faverage high, July
Winter low17 °Faverage low, January
Hot days10days a year at 90 °F or more
Freezing nights142nights a year at 32 °F or less
Growing degree days2,829base 50 °F — the season’s usable heat
Longest day15 h 18 mindaylight on June 21
Shortest day9 h 04 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation34.4 inper year, rain and melted snow
Snowfall65 inper year; 62 days with snow on the ground

Average high and low, by month

10°20°30°40°50°60°70°80°90°32 °FJanuary: average high 32 °F, low 17 °F 32°17° JanFebruary: average high 36 °F, low 18 °F 36°18° FebMarch: average high 47 °F, low 27 °F 47°27° MarApril: average high 60 °F, low 37 °F 60°37° AprMay: average high 72 °F, low 48 °F 72°48° MayJune: average high 80 °F, low 57 °F 80°57° JunJuly: average high 83 °F, low 60 °F 83°60° JulAugust: average high 81 °F, low 58 °F 81°58° AugSeptember: average high 74 °F, low 51 °F 74°51° SepOctober: average high 62 °F, low 42 °F 62°42° OctNovember: average high 48 °F, low 32 °F 48°32° NovDecember: average high 37 °F, low 23 °F 37°23° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″3″4″January: 2.09 in precipitation, 18.1 in snowfall 2.1❄18 JanFebruary: 1.58 in precipitation, 15.6 in snowfall 1.6❄16 FebMarch: 1.90 in precipitation, 6 in snowfall 1.9❄6 MarApril: 3.23 in precipitation, 2.1 in snowfall 3.2❄2 AprMay: 3.95 in precipitation 4.0 MayJune: 3.67 in precipitation 3.7 JunJuly: 3.38 in precipitation 3.4 JulAugust: 3.52 in precipitation 3.5 AugSeptember: 3.07 in precipitation 3.1 SepOctober: 3.66 in precipitation, 0.5 in snowfall 3.7❄1 OctNovember: 2.55 in precipitation, 5.9 in snowfall 2.5❄6 NovDecember: 1.84 in precipitation, 16.4 in snowfall 1.8❄16 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Battle Creek 5nw, MI (12 mi away); precipitation: Battle Creek 5nw, MI (12 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 6a.

490736a
Nashville, MI · 9 mi
490176a
Battle Creek, MI · 9 mi
490766a
Olivet, MI · 9 mi
490206a
Bedford, MI · 10 mi
490506a
Dowling, MI · 10 mi
490146a
Battle Creek, MI · 11 mi
490966a
Vermontville, MI · 12 mi
490376a
Battle Creek, MI · 13 mi

Michigan planting zones →

Questions about 49021

What planting zone is ZIP code 49021?

ZIP code 49021 (Bellevue, MI) 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 Bellevue, MI?

The median last spring frost (32 °F) near 49021 is May 6; after May 23 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Battle Creek 5nw station.

When is the first frost in Bellevue, MI?

The median first fall frost near 49021 is October 12, giving a median frost-free growing season of 158 days.

When should I plant tomatoes in 49021?

Start tomato seeds indoors around Mar 11 – Mar 25 and set transplants outside around May 13 – May 27, one to three weeks after the median last frost.

How much rain and snow does 49021 get?

About 34.4 inches of precipitation a year and 65 inches of snowfall (NOAA 1991–2020 normals, Battle Creek 5nw station).

How hot do summers get in Bellevue, MI?

The average high peaks at 83 °F in July, with about 10 days a year at 90 °F or more.

What kind of soil does 49021 have?

The USDA soil survey maps Owosso at the center of ZIP 49021: sandy loam, well drained, pH about 5.8 (moderately acidic).

Did spring come early in Bellevue, MI in 2026?

Spring leaf-out near 49021 came on Mar 30 in 2026, 10 days earlier than the 1991–2020 average (Apr 9), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Bellevue, MI?

Long-day onions: the longest day near 49021 is 15 h 18 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).