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Lansdowne, Pennsylvania

Borough in Delaware County, Pennsylvania

Air quality

The air at Lansdowne

Index 24, good, led by ozone. Read at 11 PM from its reporting area, Philadelphia (PA), 7 miles off.

24Good
  • Fine particles (PM2.5)16Good8.7 mi
  • Ozone24Good23 ppb8.7 mi
  • Coarse particles (PM10)6Good-

The days ahead

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

Smoke, the next 46 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 Lansdowne

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 Lansdowne, the next 46 hours

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

FriSat

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

What is measuring near here

The 7 instruments nearest Lansdowne, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.4 miles away.

measured now5 instruments

I-95 @ Girard AvenuePA017

Beside a road/5.3 mi away/23 ft/92 ft below here

temp, pavement temp, wind, visibility, precip

Rank-

Avondale 2 N03761

At a climate reference station/27.5 mi away/400 ft/285 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/0.4 mi away/145 ft/30 ft above here

precip, snowfall, snow depth

Rank-

Franklin InstitutePFIP1

At a cooperative observer's station/5.8 mi away/131 ft/16 ft above here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Philadelphia Intl, drawn

The nearest airport reporting now, 5.4 mi from Lansdowne, Pennsylvania. From its report of Oct 15, 2026, 10:54 PM local time: 3 of its 6 sheets.

The sky

Broken at 5,500 ft, overcast at 7,000 ft; the ceiling is 5,500 ft; visibility 10 mi or more.

Section of the sky over Philadelphia Intl, height above the station to scale: broken cloud with its base at 5,500 feet, overcast cloud with its base at 7,000 feet, the ceiling at 5,500 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 STATION02,5005,0007,50010,00012,500ETAGESLOWMIDDLETHE STATIONTHE CEILOMETER READS TO 12,000 FTOVC 7,000 FTOVERCAST, 8 EIGHTHS OF THE SKYBKN 5,500 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYCEILING 5,500 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, FB-SKY-013, FB-SKY-014

The air

60.0 F with a dew point of 52.0 F, 75 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,800 ft up; the lowest cloud reported is at 5,500 ft.

Chart of the air at Philadelphia Intl: temperature 60.0 degrees Fahrenheit and dew point 52.0, 75 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,800 feet above the station, against the lowest cloud reported at 5,500 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 STATION01,0002,0003,0004,0005,0006,0007,00040 F50 F60 F70 FSATURATES 1,800 FT ABOVE THE STATION, AT 50.2 FLOWEST CLOUD REPORTED, BKN 5,500 FTTEMPERATURE 60.0 FDEW POINT 52.0 FSPREAD 8.0 FRELATIVE HUMIDITY 75 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 (140 degrees) at 3 mph: force 1, a light air on the Beaufort scale. The strongest gust today was 26 mph.

Plan of the wind at Philadelphia Intl, north up: blowing from 140 degrees, the southeast, 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 PHLFIG. C THE WIND AT PHILADELPHIA INTLPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 140°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR1NOW, 3 MPH2LIGHT BREEZE43GENTLE 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 Lansdowne

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

Near Lansdowne

River and lake gauges