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Irmo, South Carolina

Town in Richland County, South Carolina

Air quality

The air at Irmo

Index 76, moderate, led by fine particles. Read at 1 AM from its reporting area, Columbia (SC), 18 miles off.

76Moderate
  • Fine particles (PM2.5)76Moderate13.6 mi
  • Ozone41Good27 ppb13.6 mi
  • Coarse particles (PM10)26Good13.6 mi
  • Nitrogen dioxide3Good3 ppb19.1 mi
  • Sulfur dioxide0Good0.3 ppb13.6 mi
  • Carbon monoxide-0.3 ppm13.6 mi

The days ahead

Yesterday measured 70, moderate.

Smoke, the next 43 hours

Smoke near the ground peaks at index 56, moderate, Fri 11 AM.

FriSat

Precipitation

What has fallen at Irmo

None in the last 3 days, to Fri 1 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.00in
Last 3 days
0.00in

Visibility

How far you can see at Irmo, the next 43 hours

Visibility stays 8 miles or more through Sat 8 PM, lowest 9 miles Fri 8 AM.

FriSat

On the radar over Irmo, South CarolinaReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 6 instruments nearest Irmo, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.4 miles away.

measured now4 instruments

I-26 @ I-126SC011

Beside a road/7.7 mi away/210 ft/137 ft below here

temp, pavement temp, wind, visibility, precip

Rank-

measured daily2 instruments

Irmo 0.6 WSC-LX-227

In a volunteer observer's own ground/0.4 mi away/328 ft/19 ft below here

precip, snowfall, snow depth

Rank1,077of 1,128

Cedar CRKBLYS1

At a cooperative observer's station/9.6 mi away/269 ft/78 ft below here

snowfall, snow depth, precip, high, low

Rank864of 1,128

Station report

The weather at Columbia Metro, drawn

The nearest airport reporting now, 11.7 mi from Irmo, South Carolina. From its report of Oct 16, 2026, 12:56 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 Columbia Metro, 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 CAEFIG. A THE SKY OVER COLUMBIA METROSECTION, 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 MORE0510TITLEColumbia Metro, the skySTATION REPORT · ASOS CAETYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-CAE-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

69.0 F with a dew point of 64.0 F, 84 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 Columbia Metro: temperature 69.0 degrees Fahrenheit and dew point 64.0, 84 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 CAEFIG. B THE AIR AT COLUMBIA METROTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00050 F60 F70 F80 FSATURATES 1,200 FT ABOVE THE STATION, AT 62.8 FTEMPERATURE 69.0 FDEW POINT 64.0 FSPREAD 5.0 FRELATIVE HUMIDITY 84 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 POINTTITLEColumbia Metro, the airSTATION REPORT · ASOS CAETYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-CAE-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the west (270 degrees) at 5 mph: force 2, a light breeze on the Beaufort scale.

Plan of the wind at Columbia Metro, north up: blowing from 270 degrees, the west, at 5 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 CAEFIG. C THE WIND AT COLUMBIA METROPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 270°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE4NOW, 5 MPH3GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEColumbia Metro, the windSTATION REPORT · ASOS CAETYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-CAE-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

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Snow on the ground

Elsewhere in South Carolina

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

Near Irmo

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

Near Irmo

River and lake gauges