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Chalfant, Pennsylvania

Borough in Allegheny County, Pennsylvania

Air quality

The air at Chalfant

Index 37, good, led by fine particles. Read at 11 PM from its reporting area, Pittsburgh (PA), 2 miles off.

37Good
  • Fine particles (PM2.5)37Good18.5 mi
  • Ozone17Good3 ppb18.5 mi

The days ahead

Good each day through Sun Oct 18, led by fine particles. Yesterday measured 48, good.

Smoke, the next 46 hours

Little smoke near the ground through Sat 8 PM: the index from smoke stays at 11 or under.

FriSat

Precipitation

What has fallen at Chalfant

None in the last 24 hours; 0.58 in over the last 3 days, to Thu 10 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.00in
Last 3 days
0.58in

Visibility

How far you can see at Chalfant, the next 46 hours

Mist or haze: visibility falls to 2 miles Fri 9 PM.

FriSat

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

What is measuring near here

The 6 instruments nearest Chalfant, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.5 miles away.

measured now4 instruments

measured daily2 instruments

North Versailles 1.0 NNWPA-AL-128

In a volunteer observer's own ground/1.5 mi away/1,131 ft/39 ft above here

precip, snowfall, snow depth

Rank-

Braddock Lock And DamBDDP1

At a dam/1.7 mi away/732 ft/360 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Pittsburgh/Alleghen, drawn

The nearest airport reporting now, 5.8 mi from Chalfant, Pennsylvania. From its report of Oct 15, 2026, 11:19 PM local time: 3 of its 6 sheets.

The sky

Overcast at 400 ft; the ceiling is 400 ft; visibility 4 mi.

Section of the sky over Pittsburgh/Alleghen, height above the station to scale: overcast cloud with its base at 400 feet, the ceiling at 400 feet, and visibility of 4 mi.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT AGCFIG. A THE SKY OVER PITTSBURGH/ALLEGHENSECTION, 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 400 FTOVERCAST, 8 EIGHTHS OF THE SKYCEILING 400 FTVISIBILITY, MILES: 4 MI0510TITLEPittsburgh/Alleghen, the skySTATION REPORT · ASOS AGCTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-AGC-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

63.0 F with a dew point of 62.0 F, 97 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 200 ft up; the lowest cloud reported is at 400 ft.

Chart of the air at Pittsburgh/Alleghen: temperature 63.0 degrees Fahrenheit and dew point 62.0, 97 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 200 feet above the station, against the lowest cloud reported at 400 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT AGCFIG. B THE AIR AT PITTSBURGH/ALLEGHENTHE 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 FSATURATES 200 FT ABOVE THE STATION, AT 61.8 FLOWEST CLOUD REPORTED, OVC 400 FTTEMPERATURE AND DEW POINT 63.0 F, 62.0 FRELATIVE HUMIDITY 97 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 POINTTITLEPittsburgh/Alleghen, the airSTATION REPORT · ASOS AGCTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-AGC-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the south (180 degrees) at 8 mph: force 3, a gentle breeze on the Beaufort scale.

Plan of the wind at Pittsburgh/Alleghen, north up: blowing from 180 degrees, the south, at 8 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 3, gentle breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT AGCFIG. C THE WIND AT PITTSBURGH/ALLEGHENPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 180°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE8NOW, 8 MPH4MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEPittsburgh/Alleghen, the windSTATION REPORT · ASOS AGCTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-AGC-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

0in

Snow on the ground

Measured at Braddock Lock And Dam (BDDP1), 1.7 miles from here, read 12 Oct, 06:00. measured daily

Elsewhere in Pennsylvania

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

Near Chalfant

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

Near Chalfant

River and lake gauges