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Mount Joy, Pennsylvania

Borough in Lancaster County, Pennsylvania

Air quality

The air at Mount Joy

Index 23, good, led by fine particles. Read at 11 PM from its reporting area, Susquehanna Valley (PA), 13 miles off.

23Good
  • Fine particles (PM2.5)23Good13.3 mi
  • Ozone22Good23 ppb13.3 mi

The days ahead

Good each day through Sun Oct 18, led by fine particles. Yesterday measured 57, moderate.

Smoke, the next 46 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 Mount Joy

None in the last 24 hours; 0.03 in over the last 3 days, to Thu 10 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.00in
Last 3 days
0.03in

Visibility

How far you can see at Mount Joy, the next 46 hours

Mist or haze: visibility falls to 2 miles Fri 4 PM.

FriSat

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

What is measuring near here

The 7 instruments nearest Mount Joy, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.8 miles away.

measured now5 instruments

LancasterLNS

At an airfield/11.7 mi away/404 ft/15 ft above here

temp, wind, gust, visibility, precip, pressure

Rank13of 1,383

measured daily2 instruments

Mount Joy 1.6 WNWPA-LN-37

In a volunteer observer's own ground/1.3 mi away/368 ft/21 ft below here

precip, snowfall, snow depth

Rank-

LandisvilleLDVP1

At a cooperative observer's station/4.4 mi away/367 ft/22 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Lancaster, drawn

The nearest airport reporting now, 11.7 mi from Mount Joy, Pennsylvania. From its report of Oct 15, 2026, 11:20 PM local time: 3 of its 6 sheets.

The sky

Broken at 2,800 ft, overcast at 3,300 ft; the ceiling is 2,800 ft; visibility 10 mi or more.

Section of the sky over Lancaster, height above the station to scale: broken cloud with its base at 2,800 feet, overcast cloud with its base at 3,300 feet, the ceiling at 2,800 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT LNSFIG. A THE SKY OVER LANCASTERSECTION, 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 3,300 FTOVERCAST, 8 EIGHTHS OF THE SKYBKN 2,800 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYCEILING 2,800 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLELancaster, the skySTATION REPORT · ASOS LNSTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-LNS-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

58.0 F with a dew point of 55.0 F, 90 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 700 ft up; the lowest cloud reported is at 2,800 ft.

Chart of the air at Lancaster: temperature 58.0 degrees Fahrenheit and dew point 55.0, 90 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 700 feet above the station, against the lowest cloud reported at 2,800 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT LNSFIG. B THE AIR AT LANCASTERTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,00040 F50 F60 F70 FSATURATES 700 FT ABOVE THE STATION, AT 54.3 FLOWEST CLOUD REPORTED, BKN 2,800 FTTEMPERATURE 58.0 FDEW POINT 55.0 FSPREAD 3.0 FRELATIVE HUMIDITY 90 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 POINTTITLELancaster, the airSTATION REPORT · ASOS LNSTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-LNS-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the south (170 degrees) at 7 mph: force 2, a light breeze on the Beaufort scale. The strongest gust today was 17 mph.

Plan of the wind at Lancaster, north up: blowing from 170 degrees, the south, at 7 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 2, light breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT LNSFIG. C THE WIND AT LANCASTERPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 170°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE4NOW, 7 MPH3GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLELancaster, the windSTATION REPORT · ASOS LNSTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-LNS-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Lancaster, 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 Mount Joy

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

Near Mount Joy

River and lake gauges