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Alpharetta, Georgia

City in Fulton County, Georgia

Air quality

The air at Alpharetta

Index 65, moderate, led by fine particles. Read at 11 PM from its reporting area, Atlanta (GA), 30 miles off.

65Moderate
  • Fine particles (PM2.5)65Moderate-
  • Ozone37Good-
  • Coarse particles (PM10)22Good-

The days ahead

Highest 101, unhealthy for sensitive groups, today, led by ozone. An air quality alert is called for today. Yesterday measured 74, moderate.

Smoke, the next 46 hours

Smoke near the ground peaks at index 53, moderate, Fri 9 AM.

FriSat

Precipitation

What has fallen at Alpharetta

None in the last 3 days, to Thu 10 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 Alpharetta, the next 46 hours

Visibility stays 8 miles or more through Sat 8 PM, lowest 9 miles Fri 7 AM.

FriSat

On the radar over Alpharetta, GeorgiaReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 6 instruments nearest Alpharetta, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.4 miles away.

measured now4 instruments

measured daily2 instruments

Alpharetta 1.3 NWGA-FT-54

In a volunteer observer's own ground/1.4 mi away/1,090 ft/87 ft above here

precip, snowfall, snow depth

Rank-

Dekalb Co Filter PltDRAG1

At a cooperative observer's station/9.4 mi away/1,063 ft/60 ft above here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Atlanta/Dekalb, drawn

The nearest airport reporting now, 13.6 mi from Alpharetta, Georgia. From its report of Oct 15, 2026, 10:53 PM 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 Atlanta/Dekalb, 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 PDKFIG. A THE SKY OVER ATLANTA/DEKALBSECTION, 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 MORE0510TITLEAtlanta/Dekalb, the skySTATION REPORT · ASOS PDKTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-PDK-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

71.0 F with a dew point of 64.0 F, 79 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,600 ft up.

Chart of the air at Atlanta/Dekalb: temperature 71.0 degrees Fahrenheit and dew point 64.0, 79 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,600 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT PDKFIG. B THE AIR AT ATLANTA/DEKALBTHE 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 1,600 FT ABOVE THE STATION, AT 62.3 FTEMPERATURE 71.0 FDEW POINT 64.0 FSPREAD 7.0 FRELATIVE HUMIDITY 79 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 POINTTITLEAtlanta/Dekalb, the airSTATION REPORT · ASOS PDKTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-PDK-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

Calm.

Plan of the wind at Atlanta/Dekalb, north up: calm; beside it the Beaufort scale from calm to hurricane force, force 0, calm, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT PDKFIG. C THE WIND AT ATLANTA/DEKALBPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONCALMBEAUFORT FORCELEAST WIND, MPH0CALM0NOW, 0 MPH1LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEAtlanta/Dekalb, the windSTATION REPORT · ASOS PDKTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-PDK-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

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Snow on the ground

Elsewhere in Georgia

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

Near Alpharetta

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

Near Alpharetta

River and lake gauges