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

Planting zone for 49715 — Brimley, MI

ZIP code 49715 (Brimley, Chippewa County) is in USDA zone 4b: the coldest winter night averages −25 to −20 °F. The median last spring frost is May 24 and the first fall frost October 1.

Where ZIP 49715 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 24

First frostOct 1

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 Brimley, 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 Brimley, MI

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostMay 24median — 50% chance of a later frost

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

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

Growing season127 daysfrost-free, median

A hard freeze (28 °F) usually ends around May 8 and returns around October 12.

From the NOAA station Rudyard 4n, MI — 9 miles away, elevation 755 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 49715

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Apr 12 – Apr 26

SpinachSow outdoors · Apr 12 – May 3

Broccoli, cabbageStart indoors · Mar 15 – Mar 29

Broccoli, cabbageTransplant · May 3 – May 17

Onion setsPlant outdoors · Apr 26 – May 10

PotatoesPlant outdoors · May 3 – May 17

LettuceSow outdoors · Apr 26 – May 10

Carrots, beetsSow outdoors · May 3 – May 17

TomatoesStart indoors · Mar 29 – Apr 12

TomatoesTransplant · May 31 – Jun 14

Peppers, eggplantStart indoors · Mar 15 – Mar 29

Peppers, eggplantTransplant · Jun 7 – Jun 21

BeansSow outdoors · May 31 – Jun 14

Sweet cornSow outdoors · May 31 – Jun 14

Cucumbers, squashSow outdoors · May 31 – Jun 14

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 24) 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 49715 came on May 10 — 9 days later than the 1991–2020 average (May 1).

average
May 12026
May 10

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 4b in Michigan

514 plants native to the lower 48 states, recorded in Michigan, and rated by the USDA to survive −25 °F or colder — the bottom of zone 4b. 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 Brimley, MI.

Soil in Brimley, MI

The soil mapped at the center of ZIP 49715 is Rubicon — sand, excessively drained.

TextureSanddrains and warms fast; dries out and needs more feeding

pH4.8strongly acidic; most vegetables like 6.0–7.0

DrainageExcessively drainednatural drainage class

Organic matter3%moderate

Hydrologic groupAwater soaks in fast

Farmland classNot prime farmlandUSDA classification

Map unit: Rubicon sand, 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 49715; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Brimley, MI

Summer high79 °Faverage high, July

Winter low8 °Faverage low, January

Hot days3days a year at 90 °F or more

Freezing nights181nights a year at 32 °F or less

Growing degree days1,783base 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)

Precipitation35.5 inper year, rain and melted snow

Snowfall94 inper year; 136 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: Rudyard 4n, MI (9 mi away); precipitation: Rudyard 4n, MI (9 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

497804b

Rudyard, MI · 13 mi

497885a

Kincheloe, MI · 14 mi

497845a

Kincheloe, MI · 15 mi

Kincheloe, MI · 17 mi

497834b

Sault Sainte Marie, MI · 19 mi

497855a

Kincheloe, MI · 20 mi

Michigan planting zones →

Questions about 49715

What planting zone is ZIP code 49715?

ZIP code 49715 (Brimley, MI) 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 Brimley, MI?

The median last spring frost (32 °F) near 49715 is May 24; after June 10 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Rudyard 4n station.

When is the first frost in Brimley, MI?

The median first fall frost near 49715 is October 1, giving a median frost-free growing season of 127 days.

When should I plant tomatoes in 49715?

Start tomato seeds indoors around Mar 29 – Apr 12 and set transplants outside around May 31 – Jun 14, one to three weeks after the median last frost.

How much rain and snow does 49715 get?

About 35.5 inches of precipitation a year and 94 inches of snowfall (NOAA 1991–2020 normals, Rudyard 4n station).

How hot do summers get in Brimley, MI?

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 49715 have?

The USDA soil survey maps Rubicon at the center of ZIP 49715: sand, excessively drained, pH about 4.8 (strongly acidic).

Did spring come early in Brimley, MI in 2026?

Spring leaf-out near 49715 came on May 10 in 2026, 9 days later than the 1991–2020 average (May 1), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Brimley, MI?

Long-day onions: the longest day near 49715 is 15 h 49 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).