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St. Onge, South Dakota

Community in Lawrence County, South Dakota

Air quality

The air at St. Onge

Index 24, good, led by ozone. Read at 6 AM from its reporting area, Rapid City (SD), 39 miles off.

24Good
  • Fine particles (PM2.5)17Good-
  • Ozone24Good-
  • Coarse particles (PM10)6Good-

The days ahead

Yesterday measured 36, good.

Smoke, the next 42 hours

No smoke near the ground through Sun 12 AM.

FriSat

Precipitation

What has fallen at St. Onge

None in the last 24 hours; 0.05 in over the last 3 days, to Fri 6 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.00in
Last 3 days
0.05in

Visibility

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

Visibility stays 10 miles or more through Sun 12 AM.

FriSat

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

What is measuring near here

The 6 instruments nearest St. Onge, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 3.2 miles away.

measured now4 instruments

SpearfishSPF

At an airfield/5.4 mi away/3,892 ft/455 ft above here

temp, wind, gust, visibility, precip, pressure

Rank523of 806

Sd RWIS KirkSD585

Beside a road/14.1 mi away/5,010 ft/1,573 ft above here

temp, pavement temp, wind, visibility, precip

Rank717of 806

measured daily2 instruments

SpearfishSPES2

At a cooperative observer's station/7.7 mi away/3,517 ft/80 ft above here

snowfall, snow depth, precip, high, low

Rank711of 806

Station report

The weather at Spearfish, drawn

The nearest airport reporting now, 5.4 mi from St. Onge, South Dakota. From its report of Oct 16, 2026, 7:15 AM local time: 3 of its 6 sheets.

The sky

No cloud below 12,000 ft; visibility 10 mi or more.

Section of the sky over Spearfish, height above the station to scale: no cloud detected below 12,000 feet, the reach of its ceilometer, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SPFFIG. A THE SKY OVER SPEARFISHSECTION, 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 SHEETNO CLOUD DETECTED BELOW 12,000 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLESpearfish, the skySTATION REPORT · ASOS SPFTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-SPF-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

26.6 F with a dew point of 21.2 F, 80 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,200 ft up.

Chart of the air at Spearfish: temperature 26.6 degrees Fahrenheit and dew point 21.2, 80 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; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SPFFIG. B THE AIR AT SPEARFISHTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00010 F20 F30 F40 FSATURATES 1,200 FT ABOVE THE STATION, AT 20.0 FTEMPERATURE 26.6 FDEW POINT 21.2 FSPREAD 5.4 FRELATIVE HUMIDITY 80 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 POINTTITLESpearfish, the airSTATION REPORT · ASOS SPFTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-SPF-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the west (260 degrees) at 6 mph: force 2, a light breeze on the Beaufort scale.

Plan of the wind at Spearfish, north up: blowing from 260 degrees, the west, at 6 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 2, light breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SPFFIG. C THE WIND AT SPEARFISHPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 260°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE4NOW, 6 MPH3GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLESpearfish, the windSTATION REPORT · ASOS SPFTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-SPF-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

0in

Snow on the ground

Measured at Spearfish (SPES2), 7.7 miles from here, read 15 Oct, 09:13. measured daily

Elsewhere in South Dakota

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

Near St. Onge

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

Near St. Onge

River and lake gauges