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St. Charles, Minnesota

City in Winona County, Minnesota

Air quality

The air at St. Charles

Index 18, good, led by ozone. Read at 1 AM from its reporting area, Mississippi River Valley (MN), 11 miles off.

18Good
  • Fine particles (PM2.5)-19.4 mi
  • Ozone18Good13 ppb19.4 mi

The days ahead

Good each day through Sun Oct 18, led by ozone.

Smoke, the next 42 hours

No smoke near the ground through Sat 7 PM.

FriSat

Precipitation

What has fallen at St. Charles

0.93 in in the last 24 hours, and none in the 2 days before, to Fri 1 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.93in
Last 3 days
0.93in

Visibility

How far you can see at St. Charles, the next 42 hours

Mist or haze: visibility falls to 3 miles Fri 6 AM.

FriSat

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

What is measuring near here

The 6 instruments nearest St. Charles, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.6 miles away.

measured now4 instruments

Eyota 2NEWIRM5

At a river or reservoir gauge/7.5 mi away/1,197 ft/64 ft above here

temp, wind, gust, humidity, pressure

Rank803of 1,965

measured daily2 instruments

Saint Charles 0.8 NNWMN-WN-16

In a volunteer observer's own ground/0.6 mi away/1,112 ft/21 ft below here

precip, snowfall, snow depth

Rank-

Altura 5WALTM5

At a cooperative observer's station/6.5 mi away/912 ft/221 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Winona Muni, drawn

The nearest airport reporting now, 19.1 mi from St. Charles, Minnesota. From its report of Oct 16, 2026, 1:55 AM local time: 3 of its 6 sheets.

The sky

Overcast at 2,900 ft; the ceiling is 2,900 ft; visibility 10 mi or more.

Section of the sky over Winona Muni, height above the station to scale: overcast cloud with its base at 2,900 feet, the ceiling at 2,900 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT ONAFIG. A THE SKY OVER WINONA MUNISECTION, 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 STATION01,0002,0003,0004,0005,000ETAGESLOWTHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETOVC 2,900 FTOVERCAST, 8 EIGHTHS OF THE SKYCEILING 2,900 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEWinona Muni, the skySTATION REPORT · ASOS ONATYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-ONA-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 41.0 F, 81 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,200 ft up; the lowest cloud reported is at 2,900 ft.

Chart of the air at Winona Muni: temperature 46.4 degrees Fahrenheit and dew point 41.0, 81 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,200 feet above the station, against the lowest cloud reported at 2,900 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT ONAFIG. B THE AIR AT WINONA MUNITHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,00030 F40 F50 F60 FSATURATES 1,200 FT ABOVE THE STATION, AT 39.8 FLOWEST CLOUD REPORTED, OVC 2,900 FTTEMPERATURE 46.4 FDEW POINT 41.0 FSPREAD 5.4 FRELATIVE HUMIDITY 81 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 POINTTITLEWinona Muni, the airSTATION REPORT · ASOS ONATYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-ONA-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the west northwest (290 degrees) at 12 mph, gusting 21 mph: force 3, a gentle breeze on the Beaufort scale. The strongest gust today was 22 mph.

Plan of the wind at Winona Muni, north up: blowing from 290 degrees, the west northwest, at 12 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 ONAFIG. C THE WIND AT WINONA MUNIPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 290°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE8NOW, 12 MPH4MODERATE BREEZE135FRESH BREEZE19GUST, 21 MPH6STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEWinona Muni, the windSTATION REPORT · ASOS ONATYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-ONA-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

0in

Snow on the ground

Measured at Altura 5W (ALTM5), 6.5 miles from here, read 15 Oct, 08:00. measured daily

Elsewhere in Minnesota

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

Near St. Charles

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

Near St. Charles

River and lake gauges