Storm Station
Sign in

Darby, Pennsylvania

Borough in Delaware County, Pennsylvania

Air quality

The air at Darby

Index 22, good, led by ozone. Read at 12 AM from its reporting area, Philadelphia (PA), 6 miles off.

22Good
  • Fine particles (PM2.5)20Good7.3 mi
  • Ozone22Good19 ppb7.3 mi
  • Coarse particles (PM10)6Good20.1 mi
  • Nitrogen dioxide3Good3 ppb7.3 mi
  • Sulfur dioxide0Good0 ppb7.3 mi
  • Carbon monoxide-0.1 ppm7.3 mi

The days ahead

Good each day through Sun Oct 18, led by fine particles. Yesterday measured 59, moderate.

Smoke, the next 44 hours

Little smoke near the ground through Sat 8 PM: the index from smoke stays at 6 or under.

FriSat

Precipitation

What has fallen at Darby

None in the last 3 days, to Fri 12 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 Darby, the next 44 hours

Mist or haze: visibility falls to 2 miles Fri 7 PM.

FriSat

On the radar over Darby, PennsylvaniaReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 7 instruments nearest Darby, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.8 miles away.

measured now5 instruments

I-95 @ Girard AvenuePA017

Beside a road/3.8 mi away/23 ft/61 ft below here

temp, pavement temp, wind, visibility, precip

Rank-

Avondale 2 N03761

At a climate reference station/28.0 mi away/400 ft/316 ft above here

temp, humidity, wind, solar, precip

Rank759of 1,383

measured daily2 instruments

Lansdowne 0.4 NEPA-DL-30

In a volunteer observer's own ground/1.8 mi away/145 ft/61 ft above here

precip, snowfall, snow depth

Rank-

Franklin InstitutePFIP1

At a cooperative observer's station/5.3 mi away/131 ft/47 ft above here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Philadelphia Intl, drawn

The nearest airport reporting now, 3.7 mi from Darby, Pennsylvania. From its report of Oct 15, 2026, 11:54 PM local time: 3 of its 6 sheets.

The sky

Scattered at 2,700 ft, broken at 3,800 ft, overcast at 4,600 ft; the ceiling is 3,800 ft; visibility 10 mi or more.

Section of the sky over Philadelphia Intl, height above the station to scale: scattered cloud with its base at 2,700 feet, broken cloud with its base at 3,800 feet, overcast cloud with its base at 4,600 feet, the ceiling at 3,800 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT PHLFIG. A THE SKY OVER PHILADELPHIA INTLSECTION, 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 STATION01,0002,0003,0004,0005,0006,0007,000ETAGESLOWMIDDLETHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETOVC 4,600 FTOVERCAST, 8 EIGHTHS OF THE SKYBKN 3,800 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYSCT 2,700 FTSCATTERED, 3 TO 4 EIGHTHS OF THE SKYCEILING 3,800 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEPhiladelphia Intl, the skySTATION REPORT · ASOS PHLTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-PHL-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

60.0 F with a dew point of 53.0 F, 78 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,600 ft up; the lowest cloud reported is at 2,700 ft.

Chart of the air at Philadelphia Intl: temperature 60.0 degrees Fahrenheit and dew point 53.0, 78 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, against the lowest cloud reported at 2,700 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT PHLFIG. B THE AIR AT PHILADELPHIA INTLTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,00040 F50 F60 F70 FSATURATES 1,600 FT ABOVE THE STATION, AT 51.4 FLOWEST CLOUD REPORTED, SCT 2,700 FTTEMPERATURE 60.0 FDEW POINT 53.0 FSPREAD 7.0 FRELATIVE HUMIDITY 78 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 POINTTITLEPhiladelphia Intl, the airSTATION REPORT · ASOS PHLTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-PHL-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the southeast (130 degrees) at 7 mph: force 2, a light breeze on the Beaufort scale. The strongest gust today was 26 mph.

Plan of the wind at Philadelphia Intl, north up: blowing from 130 degrees, the southeast, 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 PHLFIG. C THE WIND AT PHILADELPHIA INTLPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 130°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE4NOW, 7 MPH3GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEPhiladelphia Intl, the windSTATION REPORT · ASOS PHLTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-PHL-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

-

Snow on the ground

Elsewhere in Pennsylvania

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

Near Darby

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

Near Darby

River and lake gauges