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Canonsburg, Pennsylvania

Borough in Washington County, Pennsylvania

Air quality

The air at Canonsburg

Index 13, good, led by fine particles. Read at 10 PM from its reporting area, Mon Valley Area (PA), 17 miles off.

13Good
  • Fine particles (PM2.5)13Good2.9 mi
  • Ozone-11 ppb2.9 mi

The days ahead

Good each day through Tue Oct 20, led by fine particles. Yesterday measured 29, good.

Smoke, the next 41 hours

No smoke near the ground through Sun 2 PM.

SatSun

Precipitation

What has fallen at Canonsburg

0.38 in in the last 24 hours, 0.45 in over the last 3 days, to Fri 9 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.38in
Last 3 days
0.45in

Visibility

How far you can see at Canonsburg, the next 41 hours

Visibility stays 4 miles or more through Sun 2 PM, lowest 5 miles Fri 11 PM.

SatSun

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

What is measuring near here

The 6 instruments nearest Canonsburg, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.6 miles away.

measured now4 instruments

measured daily2 instruments

Canonsburg 0.6 SPA-WS-6

In a volunteer observer's own ground/0.6 mi away/951 ft/68 ft below here

precip, snowfall, snow depth

Rank-

CharleroiCHRP1

At a cooperative observer's station/17.2 mi away/801 ft/218 ft below here

snowfall, snow depth, precip, high, low

Rank99of 1,394

Station report

The weather at Washington County, drawn

The nearest airport reporting now, 10.3 mi from Canonsburg, Pennsylvania. From its report of Oct 16, 2026, 9:56 PM local time: 3 of its 6 sheets.

The sky

Overcast at 1,300 ft; the ceiling is 1,300 ft; visibility 10 mi or more.

Section of the sky over Washington County, height above the station to scale: overcast cloud with its base at 1,300 feet, the ceiling at 1,300 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 STATION05001,0001,5002,0002,5003,000ETAGESLOWTHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETOVC 1,300 FTOVERCAST, 8 EIGHTHS OF THE SKYCEILING 1,300 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEWashington County, the skySTATION REPORT · ASOS AFJTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-17IDSR-AFJ-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

53.0 F with a dew point of 51.0 F, 93 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 500 ft up; the lowest cloud reported is at 1,300 ft.

Chart of the air at Washington County: temperature 53.0 degrees Fahrenheit and dew point 51.0, 93 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 500 feet above the station, against the lowest cloud reported at 1,300 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 STATION01,0002,0003,00040 F50 F60 FSATURATES 500 FT ABOVE THE STATION, AT 50.5 FLOWEST CLOUD REPORTED, OVC 1,300 FTTEMPERATURE AND DEW POINT 53.0 F, 51.0 FRELATIVE HUMIDITY 93 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 6DATE2026-10-17IDSR-AFJ-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the west (270 degrees) at 10 mph: force 3, a gentle breeze on the Beaufort scale. The strongest gust today was 32 mph.

Plan of the wind at Washington County, north up: blowing from 270 degrees, the west, 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 AFJFIG. C THE WIND AT WASHINGTON COUNTYPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 270°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE8NOW, 10 MPH4MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEWashington County, the windSTATION REPORT · ASOS AFJTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-17IDSR-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), 17.2 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 Canonsburg

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

Near Canonsburg

River and lake gauges