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Dayton, Pennsylvania

Borough in Armstrong County, Pennsylvania

Air quality

The air at Dayton

Index 18, good, led by ozone. Read at 8 PM from its reporting area, Indiana County (PA), 15 miles off.

18Good
  • Fine particles (PM2.5)12Good17.6 mi
  • Ozone18Good16 ppb17.6 mi

The days ahead

Good each day through Tue Oct 20, led by fine particles. Yesterday measured 22, good.

Smoke, the next 42 hours

No smoke near the ground through Sun 2 PM.

SatSun

Precipitation

What has fallen at Dayton

0.30 in in the last 24 hours, 0.45 in over the last 3 days, to Fri 8 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.30in
Last 3 days
0.45in

Visibility

How far you can see at Dayton, the next 42 hours

Visibility stays 6 miles or more through Sun 2 PM, lowest 6 miles Fri 9 PM.

SatSun

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

What is measuring near here

The 6 instruments nearest Dayton, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.2 miles away.

measured now4 instruments

measured daily2 instruments

Dayton 0.2 SWPA-AR-3

In a volunteer observer's own ground/0.2 mi away/1,339 ft/23 ft below here

precip, snowfall, snow depth

Rank-

Mahoning LakePNYP1

At a cooperative observer's station/3.7 mi away/1,273 ft/89 ft below here

snowfall, snow depth, precip, high, low

Rank195of 1,394

Station report

The weather at Indiana/Stewart Fld, drawn

The nearest airport reporting now, 18.6 mi from Dayton, Pennsylvania. From its report of Oct 16, 2026, 9:15 PM local time: 3 of its 6 sheets.

The sky

A few clouds at 1,200 ft, broken at 2,500 ft, overcast at 2,900 ft; the ceiling is 2,500 ft; visibility 10 mi or more.

Section of the sky over Indiana/Stewart Fld, height above the station to scale: a few clouds cloud with its base at 1,200 feet, broken cloud with its base at 2,500 feet, overcast cloud with its base at 2,900 feet, the ceiling at 2,500 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT IDIFIG. A THE SKY OVER INDIANA/STEWART FLDSECTION, 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 2,900 FTOVERCAST, 8 EIGHTHS OF THE SKYBKN 2,500 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYFEW 1,200 FTA FEW CLOUDS, 1 TO 2 EIGHTHS OF THE SKYCEILING 2,500 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEIndiana/Stewart Fld, the skySTATION REPORT · ASOS IDITYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-17IDSR-IDI-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

53.6 F with a dew point of 51.8 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 1,200 ft.

Chart of the air at Indiana/Stewart Fld: temperature 53.6 degrees Fahrenheit and dew point 51.8, 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 1,200 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT IDIFIG. B THE AIR AT INDIANA/STEWART FLDTHE 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 FSATURATES 400 FT ABOVE THE STATION, AT 51.4 FLOWEST CLOUD REPORTED, FEW 1,200 FTTEMPERATURE AND DEW POINT 53.6 F, 51.8 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 POINTTITLEIndiana/Stewart Fld, the airSTATION REPORT · ASOS IDITYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-17IDSR-IDI-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the west northwest (300 degrees) at 10 mph: force 3, a gentle breeze on the Beaufort scale. The strongest gust today was 47 mph.

Plan of the wind at Indiana/Stewart Fld, north up: blowing from 300 degrees, the west northwest, at 10 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 IDIFIG. C THE WIND AT INDIANA/STEWART FLDPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 300°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE8NOW, 10 MPH4MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEIndiana/Stewart Fld, the windSTATION REPORT · ASOS IDITYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-17IDSR-IDI-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Indiana/Stewart Fld, in 6 sheets, each beside the Field Book plates that explain it

0in

Snow on the ground

Measured at Mahoning Lake (PNYP1), 3.7 miles from here, read 16 Oct, 06:00. measured daily

Elsewhere in Pennsylvania

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

Near Dayton

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

Near Dayton

River and lake gauges