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Unionville, Pennsylvania

Community in Butler County, Pennsylvania

Air quality

The air at Unionville

Index 23, good, led by ozone. Read at 9 AM from its reporting area, Mercer County (PA), 25 miles off.

23Good
  • Fine particles (PM2.5)4Good22.4 mi
  • Ozone23Good19 ppb22.4 mi

The days ahead

Good each day through Tue Oct 20, led by fine particles. Yesterday measured 19, good.

Smoke, the next 41 hours

No smoke near the ground through Mon 2 AM.

SatSun

Precipitation

What has fallen at Unionville

0.65 in in the last 24 hours, 0.81 in over the last 3 days, to Sat 8 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.65in
Last 3 days
0.81in

Visibility

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

Visibility stays 10 miles or more through Mon 2 AM.

SatSun

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

What is measuring near here

The 6 instruments nearest Unionville, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.3 miles away.

measured now4 instruments

measured daily2 instruments

Butler 6.5 NNWPA-BT-46

In a volunteer observer's own ground/0.3 mi away/1,276 ft/87 ft below here

precip, snowfall, snow depth

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Station report

The weather at Butler Co. (AWOS), drawn

The nearest airport reporting now, 11.3 mi from Unionville, Pennsylvania. From its report of Oct 17, 2026, 9:56 AM local time: 3 of its 6 sheets.

The sky

Broken at 3,500 ft; the ceiling is 3,500 ft; visibility 10 mi or more.

Section of the sky over Butler Co. (AWOS), height above the station to scale: broken cloud with its base at 3,500 feet, the ceiling at 3,500 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT BTPFIG. A THE SKY OVER BUTLER CO. (AWOS)SECTION, 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 STATION01,0002,0003,0004,0005,0006,000ETAGESLOWTHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETBKN 3,500 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYCEILING 3,500 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEButler Co. (AWOS), the skySTATION REPORT · ASOS BTPTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-17IDSR-BTP-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

43.0 F with a dew point of 32.0 F, 65 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 2,500 ft up; the lowest cloud reported is at 3,500 ft.

Chart of the air at Butler Co. (AWOS): temperature 43.0 degrees Fahrenheit and dew point 32.0, 65 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 2,500 feet above the station, against the lowest cloud reported at 3,500 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT BTPFIG. B THE AIR AT BUTLER CO. (AWOS)THE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,0005,00020 F30 F40 F50 FSATURATES 2,500 FT ABOVE THE STATION, AT 29.6 FLOWEST CLOUD REPORTED, BKN 3,500 FTTEMPERATURE 43.0 FDEW POINT 32.0 FSPREAD 11.0 FRELATIVE HUMIDITY 65 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 POINTTITLEButler Co. (AWOS), the airSTATION REPORT · ASOS BTPTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-17IDSR-BTP-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the north (360 degrees) at 10 mph, gusting 24 mph: force 3, a gentle breeze on the Beaufort scale. The strongest gust today was 24 mph.

Plan of the wind at Butler Co. (AWOS), north up: blowing from 360 degrees, the north, at 10 miles an hour, gusting 24; beside it the Beaufort scale from calm to hurricane force, force 3, gentle breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT BTPFIG. C THE WIND AT BUTLER CO. (AWOS)PLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 360°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE8NOW, 10 MPH4MODERATE BREEZE135FRESH BREEZE19GUST, 24 MPH6STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEButler Co. (AWOS), the windSTATION REPORT · ASOS BTPTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-17IDSR-BTP-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Butler Co. (AWOS), 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 Unionville

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

Near Unionville

River and lake gauges