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Deemston, Pennsylvania

Borough in Washington County, Pennsylvania

Air quality

The air at Deemston

Index 66, moderate, led by fine particles. Read at 7 AM from its reporting area, Mon Valley Area (PA), 21 miles off.

66Moderate
  • Fine particles (PM2.5)66Moderate10.5 mi
  • Ozone-17 ppb10.5 mi

The days ahead

Good each day through Sun Oct 18, led by fine particles. Yesterday measured 29, good.

Smoke, the next 44 hours

Little smoke near the ground through Sun 2 AM: the index from smoke stays at 11 or under.

FriSat

Precipitation

What has fallen at Deemston

None in the last 24 hours; 0.27 in over the last 3 days, to Fri 6 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.00in
Last 3 days
0.27in

Visibility

How far you can see at Deemston, the next 44 hours

Mist or haze: visibility falls to 3 miles Fri 11 PM.

FriSat

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

What is measuring near here

The 6 instruments nearest Deemston, 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

Clarksville 2.6 NNEPA-WS-18

In a volunteer observer's own ground/1.5 mi away/1,198 ft/69 ft above here

precip, snowfall, snow depth

Rank-

CharleroiCHRP1

At a cooperative observer's station/10.4 mi away/801 ft/328 ft below here

snowfall, snow depth, precip, high, low

Rank96of 1,383

Station report

The weather at Washington County, drawn

The nearest airport reporting now, 15.4 mi from Deemston, Pennsylvania. From its report of Oct 16, 2026, 6:56 AM local time: 3 of its 6 sheets.

The sky

A few clouds at 8,500 ft, broken at 10,000 ft; the ceiling is 10,000 ft; visibility 10 mi or more.

Section of the sky over Washington County, height above the station to scale: a few clouds cloud with its base at 8,500 feet, broken cloud with its base at 10,000 feet, the ceiling at 10,000 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT AFJFIG. A THE SKY OVER WASHINGTON COUNTYSECTION, 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 STATION02,5005,0007,50010,00012,50015,000ETAGESLOWMIDDLETHE STATIONTHE CEILOMETER READS TO 12,000 FTBKN 10,000 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYFEW 8,500 FTA FEW CLOUDS, 1 TO 2 EIGHTHS OF THE SKYCEILING 10,000 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEWashington County, the skySTATION REPORT · ASOS AFJTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-AFJ-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-013, FB-SKY-014

The air

72.0 F with a dew point of 66.0 F, 81 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,400 ft up; the lowest cloud reported is at 8,500 ft.

Chart of the air at Washington County: temperature 72.0 degrees Fahrenheit and dew point 66.0, 81 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,400 feet above the station, against the lowest cloud reported at 8,500 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT AFJFIG. B THE AIR AT WASHINGTON COUNTYTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,0005,0006,00050 F60 F70 F80 FSATURATES 1,400 FT ABOVE THE STATION, AT 64.6 FABOVE THIS SHEET: LOWEST CLOUD REPORTED, FEW 8,500 FTTEMPERATURE 72.0 FDEW POINT 66.0 FSPREAD 6.0 FRELATIVE HUMIDITY 81 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 POINTTITLEWashington County, the airSTATION REPORT · ASOS AFJTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-AFJ-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the southwest (220 degrees) at 12 mph: force 3, a gentle breeze on the Beaufort scale. The strongest gust today was 20 mph.

Plan of the wind at Washington County, north up: blowing from 220 degrees, the southwest, at 12 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 AFJFIG. C THE WIND AT WASHINGTON COUNTYPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 220°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE8NOW, 12 MPH4MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEWashington County, the windSTATION REPORT · ASOS AFJTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-AFJ-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

0in

Snow on the ground

Measured at Charleroi (CHRP1), 10.4 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 Deemston

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

Near Deemston

River and lake gauges