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Berwyn, Pennsylvania

Community in Chester County, Pennsylvania

Air quality

The air at Berwyn

Index 22, good, led by ozone. Read at 1 AM from its reporting area, Philadelphia (PA), 17 miles off.

22Good
  • Fine particles (PM2.5)19Good8.5 mi
  • Ozone22Good18 ppb8.5 mi
  • Coarse particles (PM10)-21.7 mi
  • Nitrogen dioxide3Good3 ppb18.6 mi
  • Sulfur dioxide0Good0 ppb18.6 mi
  • Carbon monoxide-0.1 ppm18.6 mi

The days ahead

Good each day through Sun Oct 18, led by fine particles. Yesterday measured 20, good.

Smoke, the next 43 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 Berwyn

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 Berwyn, the next 43 hours

Mist or haze: visibility falls to 1 mile Fri 7 PM.

FriSat

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

What is measuring near here

The 7 instruments nearest Berwyn, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.9 miles away.

measured now5 instruments

measured daily2 instruments

Devon-Berwyn 0.6 NPA-CH-6

In a volunteer observer's own ground/0.9 mi away/507 ft/53 ft above here

precip, snowfall, snow depth

Rank-

PhoenixvillePHXP1

At a cooperative observer's station/6.2 mi away/154 ft/300 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at West Chester, drawn

The nearest airport reporting now, 8.1 mi from Berwyn, Pennsylvania. From its report of Oct 16, 2026, 12:55 AM local time: 3 of its 6 sheets.

The sky

Overcast at 1,900 ft; the ceiling is 1,900 ft; visibility 10 mi or more.

Section of the sky over West Chester, height above the station to scale: overcast cloud with its base at 1,900 feet, the ceiling at 1,900 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT OQNFIG. A THE SKY OVER WEST CHESTERSECTION, 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 SHEETOVC 1,900 FTOVERCAST, 8 EIGHTHS OF THE SKYCEILING 1,900 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEWest Chester, the skySTATION REPORT · ASOS OQNTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-OQN-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

59.0 F with a dew point of 53.6 F, 82 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,300 ft up; the lowest cloud reported is at 1,900 ft.

Chart of the air at West Chester: temperature 59.0 degrees Fahrenheit and dew point 53.6, 82 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, against the lowest cloud reported at 1,900 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT OQNFIG. B THE AIR AT WEST CHESTERTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00040 F50 F60 F70 FSATURATES 1,300 FT ABOVE THE STATION, AT 52.3 FLOWEST CLOUD REPORTED, OVC 1,900 FTTEMPERATURE 59.0 FDEW POINT 53.6 FSPREAD 5.4 FRELATIVE HUMIDITY 82 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 POINTTITLEWest Chester, the airSTATION REPORT · ASOS OQNTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-OQN-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

Calm.

Plan of the wind at West Chester, 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 OQNFIG. C THE WIND AT WEST CHESTERPLAN, 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 FORCE73TITLEWest Chester, the windSTATION REPORT · ASOS OQNTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-OQN-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

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Snow on the ground

Elsewhere in Pennsylvania

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

Near Berwyn

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

Near Berwyn

River and lake gauges