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Heidelberg, Pennsylvania

Borough in Allegheny County, Pennsylvania

Air quality

The air at Heidelberg

Index 66, moderate, led by fine particles. Read at 6 AM from its reporting area, Mon Valley Area (PA), 13 miles off.

66Moderate
  • Fine particles (PM2.5)66Moderate11.6 mi
  • Ozone-25 ppb11.6 mi

The days ahead

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

Smoke, the next 45 hours

Little smoke near the ground through Sun 2 AM: the index from smoke stays at 6 or under.

FriSat

Precipitation

What has fallen at Heidelberg

None in the last 24 hours; 0.38 in over the last 3 days, to Fri 5 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.00in
Last 3 days
0.38in

Visibility

How far you can see at Heidelberg, the next 45 hours

Visibility stays 3 miles or more through Sun 2 AM, lowest 3 miles Fri 1 PM.

FriSat

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

What is measuring near here

The 6 instruments nearest Heidelberg, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.7 miles away.

measured now4 instruments

measured daily2 instruments

Carnegie 0.5 SSWPA-AL-45

In a volunteer observer's own ground/0.7 mi away/833 ft/3 ft below here

precip, snowfall, snow depth

Rank-

Station report

The weather at Pittsburgh/Alleghen, drawn

The nearest airport reporting now, 9.3 mi from Heidelberg, Pennsylvania. From its report of Oct 16, 2026, 5:53 AM local time: 3 of its 6 sheets.

The sky

A few clouds at 6,000 ft, scattered at 10,000 ft; visibility 10 mi or more.

Section of the sky over Pittsburgh/Alleghen, height above the station to scale: a few clouds cloud with its base at 6,000 feet, scattered cloud with its base at 10,000 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT AGCFIG. A THE SKY OVER PITTSBURGH/ALLEGHENSECTION, 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 FTSCT 10,000 FTSCATTERED, 3 TO 4 EIGHTHS OF THE SKYFEW 6,000 FTA FEW CLOUDS, 1 TO 2 EIGHTHS OF THE SKYVISIBILITY, MILES: 10 MI OR MORE0510TITLEPittsburgh/Alleghen, the skySTATION REPORT · ASOS AGCTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-AGC-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018, FB-SKY-013, FB-SKY-014

The air

71.0 F with a dew point of 66.0 F, 84 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,200 ft up; the lowest cloud reported is at 6,000 ft.

Chart of the air at Pittsburgh/Alleghen: temperature 71.0 degrees Fahrenheit and dew point 66.0, 84 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,200 feet above the station, against the lowest cloud reported at 6,000 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT AGCFIG. B THE AIR AT PITTSBURGH/ALLEGHENTHE 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 1,200 FT ABOVE THE STATION, AT 64.8 FLOWEST CLOUD REPORTED, FEW 6,000 FTTEMPERATURE 71.0 FDEW POINT 66.0 FSPREAD 5.0 FRELATIVE HUMIDITY 84 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 POINTTITLEPittsburgh/Alleghen, the airSTATION REPORT · ASOS AGCTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-AGC-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the south southwest (210 degrees) at 12 mph: force 3, a gentle breeze on the Beaufort scale. The strongest gust today was 16 mph.

Plan of the wind at Pittsburgh/Alleghen, north up: blowing from 210 degrees, the south 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 AGCFIG. C THE WIND AT PITTSBURGH/ALLEGHENPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 210°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE8NOW, 12 MPH4MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEPittsburgh/Alleghen, the windSTATION REPORT · ASOS AGCTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-AGC-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Pittsburgh/Alleghen, in 6 sheets, each beside the Field Book plates that explain it

0in

Snow on the ground

Measured at Emsworth Dam (EMSP1), 7.8 miles from here, read 15 Oct, 06:00. measured daily

Elsewhere in Pennsylvania

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

Near Heidelberg

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

Near Heidelberg

River and lake gauges