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St. Ignace, Michigan

City in Mackinac County, Michigan

Air quality

The air at St. Ignace

Index 16, good, led by ozone. Read at 11 PM from its reporting area, Eastern Upper Peninsula (MI), 54 miles off.

16Good
  • Fine particles (PM2.5)7Good-
  • Ozone16Good-

The days ahead

Good each day through Today, led by ozone. Yesterday measured 18, good.

Smoke, the next 45 hours

No smoke near the ground through Sat 8 PM.

FriSat

Precipitation

What has fallen at St. Ignace

0.46 in in the last 24 hours, 0.79 in over the last 3 days, to Thu 11 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.46in
Last 3 days
0.79in

Visibility

How far you can see at St. Ignace, the next 45 hours

Mist or haze: visibility falls to 3 miles Fri 1 AM.

FriSat

On the radar over St. Ignace, MichiganReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 6 instruments nearest St. Ignace, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.5 miles away.

measured now4 instruments

St. IgnaceMC012

Beside a road/2.4 mi away/603 ft/24 ft below here

temp, pavement temp, wind, visibility, precip

Rank-

Mackinaw CityNDBC-MACM4

At a river or reservoir gauge/6.1 mi away/-/- ft from here

temp, wind, gust, humidity, pressure

Rank928of 979

measured daily2 instruments

St. Ignace 0.6 WSWMI-MC-5

In a volunteer observer's own ground/0.5 mi away/701 ft/74 ft above here

precip, snowfall, snow depth

Rank-

CheboyganCHBM4

At a cooperative observer's station/19.1 mi away/577 ft/50 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Mackinac Island, drawn

The nearest airport reporting now, 4.3 mi from St. Ignace, Michigan. From its report of Oct 15, 2026, 11:55 PM local time: 3 of its 6 sheets.

The sky

Overcast at 500 ft; the ceiling is 500 ft; visibility 10 mi or more.

Section of the sky over Mackinac Island, height above the station to scale: overcast cloud with its base at 500 feet, the ceiling at 500 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MCDFIG. A THE SKY OVER MACKINAC ISLANDSECTION, HEIGHT ABOVE THE STATION TO SCALE, EACH LAYER AT THE HEIGHT OF ITS BASE AS REPORTED; COVER IN EIGHTHS OF THE SKY; TOPS NOT MEASUREDFT ABOVE THE STATION05001,0001,5002,0002,5003,000ETAGESLOWTHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETOVC 500 FTOVERCAST, 8 EIGHTHS OF THE SKYCEILING 500 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEMackinac Island, the skySTATION REPORT · ASOS MCDTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-MCD-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

46.4 F with a dew point of 46.4 F, 100 per cent relative humidity. The air is saturated at the ground; the lowest cloud reported is at 500 ft.

Chart of the air at Mackinac Island: temperature 46.4 degrees Fahrenheit and dew point 46.4, 100 per cent relative humidity; the air saturated at the ground, against the lowest cloud reported at 500 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MCDFIG. B THE AIR AT MACKINAC ISLANDTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00040 F50 F60 FSATURATED AT THE GROUNDLOWEST CLOUD REPORTED, OVC 500 FTTEMPERATURE AND DEW POINT 46.4 F, 46.4 FRELATIVE HUMIDITY 100 PER CENTTHE AIR COOLS ABOUT 5.4 F EACH 1,000 FT IT RISES, AND ITS DEW POINT ABOUT 1 FSOLID: THE LIFTED AIR'S TEMPERATURE; DASHED: ITS DEW POINTTITLEMackinac Island, the airSTATION REPORT · ASOS MCDTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-MCD-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the east (80 degrees) at 10 mph, gusting 21 mph: force 3, a gentle breeze on the Beaufort scale. The strongest gust today was 28 mph.

Plan of the wind at Mackinac Island, north up: blowing from 80 degrees, the east, at 10 miles an hour, gusting 21; beside it the Beaufort scale from calm to hurricane force, force 3, gentle breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MCDFIG. C THE WIND AT MACKINAC ISLANDPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 80°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE8NOW, 10 MPH4MODERATE BREEZE135FRESH BREEZE19GUST, 21 MPH6STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEMackinac Island, the windSTATION REPORT · ASOS MCDTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-MCD-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Mackinac Island, in 6 sheets, each beside the Field Book plates that explain it

0in

Snow on the ground

Measured at Cheboygan (CHBM4), 19.1 miles from here, read 8 Oct, 08:00. measured daily

Elsewhere in Michigan

66 places, each with its own forecast and its own instruments.

Near St. Ignace

The nearest places, each with its own forecast and the instruments nearest it.

Near St. Ignace

River and lake gauges