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Cedar Knolls, New Jersey

Community in Morris County, New Jersey

Air quality

The air at Cedar Knolls

Index 25, good, led by fine particles. Read at 5 AM from its reporting area, North Central (NJ), 10 miles off.

25Good
  • Fine particles (PM2.5)25Good12 mi
  • Ozone20Good22 ppb19.4 mi
  • Nitrogen dioxide2Good2 ppb17.7 mi
  • Sulfur dioxide0Good0 ppb12 mi
  • Carbon monoxide-0.1 ppm17.7 mi

The days ahead

Highest 55, moderate, Mon Oct 19, led by fine particles. Yesterday measured 34, good.

Smoke, the next 46 hours

No smoke near the ground through Mon 2 AM.

SatSun

Precipitation

What has fallen at Cedar Knolls

0.35 in in the last 24 hours, 0.38 in over the last 3 days, to Sat 4 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.35in
Last 3 days
0.38in

Visibility

How far you can see at Cedar Knolls, the next 46 hours

Visibility stays 10 miles or more through Mon 2 AM.

SatSun

On the radar over Cedar Knolls, New JerseyReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 5 instruments nearest Cedar Knolls, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.9 miles away.

measured now3 instruments

measured daily2 instruments

Morris Plains 0.7 SENJ-MS-104

In a volunteer observer's own ground/0.9 mi away/451 ft/101 ft above here

precip, snowfall, snow depth

Rank-

DenvilleDNVN4

At a cooperative observer's station/5.3 mi away/512 ft/162 ft above here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Morristown Muni, drawn

The nearest airport reporting now, 2.6 mi from Cedar Knolls, New Jersey. From its report of Oct 17, 2026, 5:15 AM local time: 3 of its 6 sheets.

The sky

Overcast at 12,000 ft; the ceiling is 12,000 ft; visibility 10 mi or more.

Section of the sky over Morristown Muni, height above the station to scale: overcast cloud with its base at 12,000 feet, the ceiling at 12,000 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MMUFIG. A THE SKY OVER MORRISTOWN MUNISECTION, 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 STATION02,5005,0007,50010,00012,50015,00017,50020,000ETAGESLOWMIDDLEHIGHTHE STATIONTHE CEILOMETER READS TO 12,000 FTOVC 12,000 FTOVERCAST, 8 EIGHTHS OF THE SKYCEILING 12,000 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEMorristown Muni, the skySTATION REPORT · ASOS MMUTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-17IDSR-MMU-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-013, FB-SKY-014

The air

51.8 F with a dew point of 41.0 F, 66 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 12,000 ft.

Chart of the air at Morristown Muni: temperature 51.8 degrees Fahrenheit and dew point 41.0, 66 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 12,000 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MMUFIG. B THE AIR AT MORRISTOWN MUNITHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION02,0004,0006,0008,00030 F40 F50 F60 FSATURATES 2,500 FT ABOVE THE STATION, AT 38.6 FABOVE THIS SHEET: LOWEST CLOUD REPORTED, OVC 12,000 FTTEMPERATURE 51.8 FDEW POINT 41.0 FSPREAD 10.8 FRELATIVE HUMIDITY 66 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 POINTTITLEMorristown Muni, the airSTATION REPORT · ASOS MMUTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-17IDSR-MMU-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the northwest (320 degrees) at 9 mph, gusting 18 mph: force 3, a gentle breeze on the Beaufort scale. The strongest gust today was 21 mph.

Plan of the wind at Morristown Muni, north up: blowing from 320 degrees, the northwest, at 9 miles an hour, gusting 18; beside it the Beaufort scale from calm to hurricane force, force 3, gentle breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MMUFIG. C THE WIND AT MORRISTOWN MUNIPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 320°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE8NOW, 9 MPH4MODERATE BREEZE13GUST, 18 MPH5FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEMorristown Muni, the windSTATION REPORT · ASOS MMUTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-17IDSR-MMU-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Morristown Muni, in 6 sheets, each beside the Field Book plates that explain it

0in

Snow on the ground

Measured at Denville (DNVN4), 5.3 miles from here, read 16 Oct, 08:00. measured daily

Elsewhere in New Jersey

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

Near Cedar Knolls

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

Near Cedar Knolls

River and lake gauges