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Johnston, South Carolina

Town in Edgefield County, South Carolina

Air quality

The air at Johnston

Index 84, moderate, led by fine particles. Read at 12 AM from its reporting area, Aiken-Augusta - SC and GA (SC), 33 miles off.

84Moderate
  • Fine particles (PM2.5)84Moderate7 mi
  • Ozone41Good40 ppb7 mi
  • Sulfur dioxide0Good0.3 ppb7 mi

The days ahead

Yesterday measured 77, moderate.

Smoke, the next 44 hours

Smoke near the ground peaks at index 55, moderate, Fri 5 AM.

FriSat

Precipitation

What has fallen at Johnston

None in the last 3 days, to Thu 11 PM. 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 Johnston, the next 44 hours

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

FriSat

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

What is measuring near here

The 6 instruments nearest Johnston, 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

AikenAIK

At an airfield/14.4 mi away/528 ft/136 ft below here

temp, wind, gust, visibility, precip, pressure

Rank212of 1,128

US-25 @ I-20SC014

Beside a road/20.4 mi away/499 ft/165 ft below here

temp, pavement temp, wind, visibility, precip

Rank-

measured daily2 instruments

Johnston 0.5 NESC-ED-6

In a volunteer observer's own ground/0.5 mi away/629 ft/35 ft below here

precip, snowfall, snow depth

Rank-

JohnstonJOHS1

At a cooperative observer's station/4.5 mi away/633 ft/31 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Aiken, drawn

The nearest airport reporting now, 14.4 mi from Johnston, South Carolina. From its report of Oct 16, 2026, 12:35 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 Aiken, 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 AIKFIG. A THE SKY OVER AIKENSECTION, 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 MORE0510TITLEAiken, the skySTATION REPORT · ASOS AIKTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-AIK-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

67.0 F with a dew point of 62.2 F, 85 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,100 ft up.

Chart of the air at Aiken: temperature 67.0 degrees Fahrenheit and dew point 62.2, 85 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,100 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT AIKFIG. B THE AIR AT AIKENTHE 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 1,100 FT ABOVE THE STATION, AT 61.0 FTEMPERATURE 67.0 FDEW POINT 62.2 FSPREAD 4.8 FRELATIVE HUMIDITY 85 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 POINTTITLEAiken, the airSTATION REPORT · ASOS AIKTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-AIK-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the south (170 degrees) at 7 mph: force 2, a light breeze on the Beaufort scale.

Plan of the wind at Aiken, north up: blowing from 170 degrees, the south, at 7 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 AIKFIG. C THE WIND AT AIKENPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 170°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE4NOW, 7 MPH3GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEAiken, the windSTATION REPORT · ASOS AIKTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-AIK-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Aiken, 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 Johnston

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

Near Johnston

River and lake gauges