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Williamston, South Carolina

Town in Anderson County, South Carolina

Air quality

The air at Williamston

Index 64, moderate, led by fine particles. Read at 1 AM from its reporting area, Greenville-Spartanburg (SC), 28 miles off.

64Moderate
  • Fine particles (PM2.5)64Moderate15.9 mi
  • Ozone21Good30 ppb15.6 mi
  • Coarse particles (PM10)20Good15.9 mi
  • Nitrogen dioxide18Good19 ppb15.9 mi
  • Sulfur dioxide0Good0.1 ppb15.9 mi

The days ahead

Yesterday measured 62, moderate.

Smoke, the next 43 hours

Little smoke near the ground through Sat 8 PM: the index from smoke stays at 39 or under.

FriSat

Precipitation

What has fallen at Williamston

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 Williamston, the next 43 hours

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

FriSat

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

What is measuring near here

The 6 instruments nearest Williamston, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.5 miles away.

measured now4 instruments

And- 326343714082285600

At a river or reservoir gauge/0.5 mi away/785 ft/29 ft below here

temp, wind, gust, humidity, pressure

Rank390of 1,128

I-85 @ SC-8SC003

Beside a road/5.1 mi away/955 ft/141 ft above here

temp, pavement temp, wind, visibility, precip

Rank-

GreenvilleGYH

At an airfield/11.5 mi away/955 ft/141 ft above here

temp, wind, gust, visibility, precip, pressure

Rank926of 1,128

measured daily2 instruments

Pelzer 0.8 WSC-AN-5

In a volunteer observer's own ground/1.9 mi away/864 ft/50 ft above here

precip, snowfall, snow depth

Rank-

Lee Steam PlantBELS1

At a cooperative observer's station/2.9 mi away/656 ft/158 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Greenville, drawn

The nearest airport reporting now, 11.5 mi from Williamston, South Carolina. From its report of Oct 16, 2026, 1:35 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 Greenville, 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 GYHFIG. A THE SKY OVER GREENVILLESECTION, 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 MORE0510TITLEGreenville, the skySTATION REPORT · ASOS GYHTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-GYH-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

69.8 F with a dew point of 64.4 F, 83 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,300 ft up.

Chart of the air at Greenville: temperature 69.8 degrees Fahrenheit and dew point 64.4, 83 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,300 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT GYHFIG. B THE AIR AT GREENVILLETHE 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 1,300 FT ABOVE THE STATION, AT 63.1 FTEMPERATURE 69.8 FDEW POINT 64.4 FSPREAD 5.4 FRELATIVE HUMIDITY 83 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 POINTTITLEGreenville, the airSTATION REPORT · ASOS GYHTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-GYH-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the southwest (220 degrees) at 6 mph: force 2, a light breeze on the Beaufort scale.

Plan of the wind at Greenville, north up: blowing from 220 degrees, the southwest, 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 GYHFIG. C THE WIND AT GREENVILLEPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 220°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE4NOW, 6 MPH3GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEGreenville, the windSTATION REPORT · ASOS GYHTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-GYH-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Greenville, 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 Williamston

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

Near Williamston

River and lake gauges