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Belfast, Pennsylvania

Community in Northampton County, Pennsylvania

Air quality

The air at Belfast

Index 21, good, led by ozone. Read at 2 AM from its reporting area, Lehigh Valley (PA), 20 miles off.

21Good
  • Fine particles (PM2.5)13Good11.1 mi
  • Ozone21Good-

The days ahead

Good each day through Sun Oct 18, led by fine particles. Yesterday measured 31, good.

Smoke, the next 42 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 Belfast

None in the last 3 days, to Fri 2 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 Belfast, the next 42 hours

Fog: visibility falls to 0.8 miles Fri 8 AM, under a mile for 1 hour.

FriSat

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

What is measuring near here

The 6 instruments nearest Belfast, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 2.0 miles away.

measured now4 instruments

measured daily2 instruments

Martins CreekMCNP1

At a cooperative observer's station/4.8 mi away/226 ft/355 ft below here

snowfall, snow depth, precip, high, low

Rank27of 1,383

Station report

The weather at Allentown-Bethlehem, drawn

The nearest airport reporting now, 12.9 mi from Belfast, Pennsylvania. From its report of Oct 16, 2026, 2:51 AM local time: 3 of its 6 sheets.

The sky

Scattered at 1,700 ft, overcast at 2,600 ft; the ceiling is 2,600 ft; visibility 10 mi or more.

Section of the sky over Allentown-Bethlehem, height above the station to scale: scattered cloud with its base at 1,700 feet, overcast cloud with its base at 2,600 feet, the ceiling at 2,600 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT ABEFIG. A THE SKY OVER ALLENTOWN-BETHLEHEMSECTION, 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 STATION05001,0001,5002,0002,5003,0003,5004,000ETAGESLOWTHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETOVC 2,600 FTOVERCAST, 8 EIGHTHS OF THE SKYSCT 1,700 FTSCATTERED, 3 TO 4 EIGHTHS OF THE SKYCEILING 2,600 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEAllentown-Bethlehem, the skySTATION REPORT · ASOS ABETYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-ABE-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

57.0 F with a dew point of 53.0 F, 86 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 900 ft up; the lowest cloud reported is at 1,700 ft.

Chart of the air at Allentown-Bethlehem: temperature 57.0 degrees Fahrenheit and dew point 53.0, 86 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 900 feet above the station, against the lowest cloud reported at 1,700 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT ABEFIG. B THE AIR AT ALLENTOWN-BETHLEHEMTHE 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 900 FT ABOVE THE STATION, AT 52.1 FLOWEST CLOUD REPORTED, SCT 1,700 FTTEMPERATURE 57.0 FDEW POINT 53.0 FSPREAD 4.0 FRELATIVE HUMIDITY 86 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 POINTTITLEAllentown-Bethlehem, the airSTATION REPORT · ASOS ABETYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-ABE-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 3 mph: force 1, a light air on the Beaufort scale.

Plan of the wind at Allentown-Bethlehem, north up: blowing from 180 degrees, the south, 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 ABEFIG. C THE WIND AT ALLENTOWN-BETHLEHEMPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 180°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR1NOW, 3 MPH2LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEAllentown-Bethlehem, the windSTATION REPORT · ASOS ABETYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-ABE-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Allentown-Bethlehem, 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 Belfast

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

Near Belfast

River and lake gauges