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Norristown, Pennsylvania

Borough in Montgomery County, Pennsylvania

Air quality

The air at Norristown

Index 21, good, led by fine particles. Read at 6 AM from its reporting area, Philadelphia (PA), 15 miles off.

21Good
  • Fine particles (PM2.5)21Good1.7 mi
  • Ozone17Good17 ppb1.7 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 6 or under.

FriSat

Precipitation

What has fallen at Norristown

None in the last 24 hours; 0.24 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
0.24in

Visibility

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

Visibility stays 8 miles or more through Sun 2 AM, lowest 8 miles Fri 8 AM.

FriSat

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

What is measuring near here

The 7 instruments nearest Norristown, 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

Avondale 2 N03761

At a climate reference station/29.8 mi away/400 ft/264 ft above here

temp, humidity, wind, solar, precip

Rank759of 1,383

measured daily2 instruments

NorristownNRSP1

At a cooperative observer's station/0.8 mi away/62 ft/74 ft below here

snowfall, snow depth, precip, high, low

Rank944of 1,383

Norristown 1.3 WNWPA-MT-122

In a volunteer observer's own ground/1.2 mi away/222 ft/86 ft above here

precip, snowfall, snow depth

Rank-

Station report

The weather at Philadelphia/Wings Field, drawn

The nearest airport reporting now, 4.2 mi from Norristown, Pennsylvania. From its report of Oct 16, 2026, 6:35 AM local time: 3 of its 6 sheets.

The sky

Overcast at 400 ft; the ceiling is 400 ft; visibility 5 mi.

Section of the sky over Philadelphia/Wings Field, height above the station to scale: overcast cloud with its base at 400 feet, the ceiling at 400 feet, and visibility of 5 mi.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT LOMFIG. A THE SKY OVER PHILADELPHIA/WINGS FIELDSECTION, 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 400 FTOVERCAST, 8 EIGHTHS OF THE SKYCEILING 400 FTVISIBILITY, MILES: 5 MI0510TITLEPhiladelphia/Wings Field, the skySTATION REPORT · ASOS LOMTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-LOM-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

59.0 F with a dew point of 59.0 F, 100 per cent relative humidity. The air is saturated at the ground; the lowest cloud reported is at 400 ft.

Chart of the air at Philadelphia/Wings Field: temperature 59.0 degrees Fahrenheit and dew point 59.0, 100 per cent relative humidity; the air saturated at the ground, against the lowest cloud reported at 400 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT LOMFIG. B THE AIR AT PHILADELPHIA/WINGS FIELDTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00050 F60 F70 FSATURATED AT THE GROUNDLOWEST CLOUD REPORTED, OVC 400 FTTEMPERATURE AND DEW POINT 59.0 F, 59.0 FRELATIVE HUMIDITY 100 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 POINTTITLEPhiladelphia/Wings Field, the airSTATION REPORT · ASOS LOMTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-LOM-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the south (190 degrees) at 5 mph: force 2, a light breeze on the Beaufort scale.

Plan of the wind at Philadelphia/Wings Field, north up: blowing from 190 degrees, the south, at 5 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 LOMFIG. C THE WIND AT PHILADELPHIA/WINGS FIELDPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 190°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE4NOW, 5 MPH3GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEPhiladelphia/Wings Field, the windSTATION REPORT · ASOS LOMTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-LOM-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

0in

Snow on the ground

Measured at Norristown (NRSP1), 0.8 miles from here, read 15 Oct, 07:00. measured daily

Elsewhere in Pennsylvania

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

Near Norristown

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

Near Norristown

River and lake gauges