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St. Clair, Minnesota

City in Blue Earth County, Minnesota

Air quality

The air at St. Clair

Index 20, good, led by ozone. Read at 1 PM from its reporting area, South Central Minnesota (MN), 17 miles off.

20Good
  • Fine particles (PM2.5)8Good-
  • Ozone20Good-

The days ahead

Good each day through Sun Oct 18, led by ozone. Yesterday measured 26, good.

Smoke, the next 43 hours

No smoke near the ground through Sun 7 AM.

FriSatSun

Precipitation

What has fallen at St. Clair

0.52 in in the last 24 hours, 1.20 in over the last 3 days, to Fri 12 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.52in
Last 3 days
1.20in

Visibility

How far you can see at St. Clair, the next 43 hours

Visibility stays 8 miles or more through Sun 7 AM, lowest 8 miles Sat 4 AM.

FriSatSun

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

What is measuring near here

The 6 instruments nearest St. Clair, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.2 miles away.

measured now4 instruments

MankatoMKT

At an airfield/10.3 mi away/1,020 ft/25 ft above here

temp, wind, gust, visibility, precip, pressure

Rank484of 1,965

measured daily2 instruments

Saint Clair 0.2 SEMN-BU-15

In a volunteer observer's own ground/0.2 mi away/980 ft/15 ft below here

precip, snowfall, snow depth

Rank-

Station report

The weather at Mankato, drawn

The nearest airport reporting now, 10.3 mi from St. Clair, Minnesota. From its report of Oct 16, 2026, 12:56 PM local time: 3 of its 6 sheets.

The sky

Broken at 3,700 ft; the ceiling is 3,700 ft; visibility 10 mi or more.

Section of the sky over Mankato, height above the station to scale: broken cloud with its base at 3,700 feet, the ceiling at 3,700 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MKTFIG. A THE SKY OVER MANKATOSECTION, 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 STATION01,0002,0003,0004,0005,0006,000ETAGESLOWTHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETBKN 3,700 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYCEILING 3,700 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEMankato, the skySTATION REPORT · ASOS MKTTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-MKT-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

50.0 F with a dew point of 35.0 F, 56 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 3,400 ft up; the lowest cloud reported is at 3,700 ft.

Chart of the air at Mankato: temperature 50.0 degrees Fahrenheit and dew point 35.0, 56 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 3,400 feet above the station, against the lowest cloud reported at 3,700 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MKTFIG. B THE AIR AT MANKATOTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,0005,00020 F30 F40 F50 F60 FSATURATES 3,400 FT ABOVE THE STATION, AT 31.8 FLOWEST CLOUD REPORTED, BKN 3,700 FTTEMPERATURE 50.0 FDEW POINT 35.0 FSPREAD 15.0 FRELATIVE HUMIDITY 56 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 POINTTITLEMankato, the airSTATION REPORT · ASOS MKTTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-MKT-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the north (360 degrees) at 17 mph, gusting 26 mph: force 4, a moderate breeze on the Beaufort scale. The strongest gust today was 41 mph.

Plan of the wind at Mankato, north up: blowing from 360 degrees, the north, at 17 miles an hour, gusting 26; beside it the Beaufort scale from calm to hurricane force, force 4, moderate breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MKTFIG. C THE WIND AT MANKATOPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 360°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE13NOW, 17 MPH5FRESH BREEZE196STRONG BREEZE25GUST, 26 MPH7NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEMankato, the windSTATION REPORT · ASOS MKTTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-MKT-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

0in

Snow on the ground

Measured at North Mankato (NMAM5), 11.2 miles from here, read 16 Oct, 08:00. measured daily

Elsewhere in Minnesota

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

Near St. Clair

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

Near St. Clair

River and lake gauges