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Topton, Pennsylvania

Borough in Berks County, Pennsylvania

Air quality

The air at Topton

Index 21, good, led by ozone. Read at 2 AM from its reporting area, Lehigh Valley (PA), 10 miles off.

21Good
  • Fine particles (PM2.5)13Good16 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 Topton

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 Topton, the next 42 hours

Mist or haze: visibility falls to 2 miles Fri 8 AM.

FriSat

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

What is measuring near here

The 6 instruments nearest Topton, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.6 miles away.

measured now4 instruments

AllentownXLL

At an airfield/12.1 mi away/400 ft/85 ft below here

temp, wind, gust, visibility, precip, pressure

Rank238of 1,383

measured daily2 instruments

Mertztown 1.5 NWPA-BR-48

In a volunteer observer's own ground/1.7 mi away/484 ft/1 ft below here

precip, snowfall, snow depth

Rank-

PalmPLMP1

At a cooperative observer's station/13.4 mi away/289 ft/196 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Allentown, drawn

The nearest airport reporting now, 12.1 mi from Topton, Pennsylvania. From its report of Oct 16, 2026, 2:55 AM local time: 3 of its 6 sheets.

The sky

Broken at 2,000 ft, overcast at 2,800 ft; the ceiling is 2,000 ft; visibility 10 mi or more.

Section of the sky over Allentown, height above the station to scale: broken cloud with its base at 2,000 feet, overcast cloud with its base at 2,800 feet, the ceiling at 2,000 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT XLLFIG. A THE SKY OVER ALLENTOWNSECTION, 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 STATION01,0002,0003,0004,0005,000ETAGESLOWTHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETOVC 2,800 FTOVERCAST, 8 EIGHTHS OF THE SKYBKN 2,000 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYCEILING 2,000 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEAllentown, the skySTATION REPORT · ASOS XLLTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-XLL-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

55.4 F with a dew point of 53.6 F, 94 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 400 ft up; the lowest cloud reported is at 2,000 ft.

Chart of the air at Allentown: temperature 55.4 degrees Fahrenheit and dew point 53.6, 94 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 400 feet above the station, against the lowest cloud reported at 2,000 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT XLLFIG. B THE AIR AT ALLENTOWNTHE 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 400 FT ABOVE THE STATION, AT 53.2 FLOWEST CLOUD REPORTED, BKN 2,000 FTTEMPERATURE AND DEW POINT 55.4 F, 53.6 FRELATIVE HUMIDITY 94 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, the airSTATION REPORT · ASOS XLLTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-XLL-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

Calm.

Plan of the wind at Allentown, 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 XLLFIG. C THE WIND AT ALLENTOWNPLAN, 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 FORCE73TITLEAllentown, the windSTATION REPORT · ASOS XLLTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-XLL-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Allentown, 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 Topton

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

Near Topton

River and lake gauges