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St. Charles, South Dakota

Community in Gregory County, South Dakota

Air quality

The air at St. Charles

Index 26, good, led by ozone. Read at 1 AM from its reporting area, Santee Sioux Reservation (NE), 65 miles off.

26Good
  • Ozone26Good-

Smoke, the next 43 hours

No smoke near the ground through Sat 7 PM.

FriSat

Precipitation

What has fallen at St. Charles

0.09 in in the last 24 hours, 0.13 in over the last 3 days, to Fri 12 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.09in
Last 3 days
0.13in

Visibility

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

Visibility stays 9 miles or more through Sat 7 PM, lowest 10 miles Fri 5 AM.

FriSat

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

What is measuring near here

The 4 instruments nearest St. Charles, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 7.4 miles away.

measured now2 instruments

measured daily2 instruments

Burke 10.5 SSESD-GY-18

In a volunteer observer's own ground/7.4 mi away/2,111 ft/36 ft above here

precip, snowfall, snow depth

Rank790of 806

Winner 24MI.SeGRGS2

At a cooperative observer's station/19.9 mi away/2,162 ft/87 ft above here

snowfall, snow depth, precip, high, low

Rank671of 806

Station report

The weather at Lake Andes RAWS, drawn

The nearest instrument reporting now, 20.6 mi from St. Charles, South Dakota. From its report of Oct 16, 2026, 12:41 AM local time: 3 of its 5 sheets.

The air

45.0 F with a dew point of 35.8 F, 70 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 2,100 ft up.

Chart of the air at Lake Andes RAWS: temperature 45.0 degrees Fahrenheit and dew point 35.8, 70 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 2,100 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT RLAS2FIG. B THE AIR AT LAKE ANDES RAWSTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00020 F30 F40 F50 F60 FSATURATES 2,100 FT ABOVE THE STATION, AT 33.8 FTEMPERATURE 45.0 FDEW POINT 35.8 FSPREAD 9.2 FRELATIVE HUMIDITY 70 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 POINTTITLELake Andes RAWS, the airSTATION REPORT · DCP RLAS2TYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 5DATE2026-10-16IDSR-RLAS2-1DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the northwest (315 degrees) at 19 mph: force 5, a fresh breeze on the Beaufort scale.

Plan of the wind at Lake Andes RAWS, north up: blowing from 315 degrees, the northwest, at 19 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 5, fresh breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT RLAS2FIG. C THE WIND AT LAKE ANDES RAWSPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 315°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE19NOW, 19 MPH6STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLELake Andes RAWS, the windSTATION REPORT · DCP RLAS2TYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 2 of 5DATE2026-10-16IDSR-RLAS2-2DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008

The column

At 1,709 ft above sea level, 6 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 28.12 inHg and the temperature at 52.9 F; it reports 45.0 F, 7.9 F colder than standard.

Section from sea level of where Lake Andes RAWS stands in the atmosphere, height to scale: the station 1,709 feet above sea level with 6 per cent of the air below it; the standard atmosphere's pressure there, 28.12 inches of mercury, and temperature, 52.9 degrees Fahrenheit.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT RLAS2FIG. D WHERE LAKE ANDES RAWS STANDS IN THE ATMOSPHERESECTION FROM SEA LEVEL, HEIGHT TO SCALE, THE STATION IN THE STANDARD ATMOSPHEREFT ABOVE SEA LEVEL05,00010,00015,000SEA LEVEL, 29.92 inHg IN THE STANDARD ATMOSPHERELAKE ANDES RAWS6 PER CENT OF THE AIR BELOW IT1,709 FT10 PER CENT OF THE AIR BELOW, 2,890 FT20 PER CENT OF THE AIR BELOW, 6,050 FT30 PER CENT OF THE AIR BELOW, 9,540 FT40 PER CENT OF THE AIR BELOW, 13,470 FTSTANDARD PRESSURE HERE28.12 inHgSTANDARD TEMPERATURE HERE52.9 FTEMPERATURE, REPORTED45.0 FTITLELake Andes RAWS, the columnSTATION REPORT · DCP RLAS2TYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 3 of 5DATE2026-10-16IDSR-RLAS2-3DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

The full report of Lake Andes RAWS, in 5 sheets, each beside the Field Book plates that explain it

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Snow on the ground

Elsewhere in South Dakota

24 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