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Tega Cay, South Carolina

City in York County, South Carolina

Air quality

The air at Tega Cay

Index 9, good, led by nitrogen dioxide. Read at 1 AM from its reporting area, York, Chester, and Lancaster (SC), 7 miles off.

9Good
  • Fine particles (PM2.5)-11.7 mi
  • Ozone7Good0 ppb11.7 mi
  • Coarse particles (PM10)-18.9 mi
  • Nitrogen dioxide9Good10.4 ppb14.2 mi
  • Sulfur dioxide0Good0 ppb18.9 mi
  • Carbon monoxide-0.3 ppm18.9 mi

Smoke, the next 43 hours

Little smoke near the ground through Sat 8 PM: the index from smoke stays at 33 or under.

FriSat

Precipitation

What has fallen at Tega Cay

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 Tega Cay, the next 43 hours

Visibility stays 7 miles or more through Sat 8 PM, lowest 8 miles Sat 6 AM.

FriSat

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

What is measuring near here

The 6 instruments nearest Tega Cay, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.1 miles away.

measured now4 instruments

I-85 @ SC-198SC015

Beside a road/30.9 mi away/666 ft/48 ft above here

temp, pavement temp, wind, visibility, precip

Rank-

measured daily2 instruments

Tega Cay 0.5 NESC-YR-38

In a volunteer observer's own ground/0.1 mi away/630 ft/12 ft above here

precip, snowfall, snow depth

Rank-

Station report

The weather at Rock Hill (Was 29J), drawn

The nearest airport reporting now, 4.4 mi from Tega Cay, South Carolina. From its report of Oct 16, 2026, 12:54 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 Rock Hill (Was 29J), 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 UZAFIG. A THE SKY OVER ROCK HILL (WAS 29J)SECTION, 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 MORE0510TITLERock Hill (Was 29J), the skySTATION REPORT · ASOS UZATYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-UZA-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

66.0 F with a dew point of 65.0 F, 97 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 200 ft up.

Chart of the air at Rock Hill (Was 29J): temperature 66.0 degrees Fahrenheit and dew point 65.0, 97 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 200 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT UZAFIG. B THE AIR AT ROCK HILL (WAS 29J)THE 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 200 FT ABOVE THE STATION, AT 64.7 FTEMPERATURE AND DEW POINT 66.0 F, 65.0 FRELATIVE HUMIDITY 97 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 POINTTITLERock Hill (Was 29J), the airSTATION REPORT · ASOS UZATYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-UZA-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the south southwest (210 degrees) at 3 mph: force 1, a light air on the Beaufort scale.

Plan of the wind at Rock Hill (Was 29J), north up: blowing from 210 degrees, the south southwest, at 3 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 1, light air, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT UZAFIG. C THE WIND AT ROCK HILL (WAS 29J)PLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 210°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR1NOW, 3 MPH2LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLERock Hill (Was 29J), the windSTATION REPORT · ASOS UZATYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-UZA-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Rock Hill (Was 29J), 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 Tega Cay

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

Near Tega Cay

River and lake gauges