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Mendham, New Jersey

Borough in Morris County, New Jersey

Air quality

The air at Mendham

Index 28, good, led by fine particles. Read at 4 AM from its reporting area, North Central (NJ), 2 miles off.

28Good
  • Fine particles (PM2.5)28Good4 mi
  • Ozone21Good23 ppb4 mi
  • Nitrogen dioxide1Good1 ppb4 mi
  • Sulfur dioxide0Good0 ppb4 mi
  • Carbon monoxide-0.1 ppm22.6 mi

The days ahead

Good each day through Today, led by ozone. Yesterday measured 28, good.

Smoke, the next 41 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 Mendham

None in the last 3 days, to Fri 3 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.00in
Last 3 days
0.00in

Visibility

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

Dense fog: visibility falls to 0.1 miles Fri 10 AM, under a mile for 3 hours.

FriSat

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

What is measuring near here

The 5 instruments nearest Mendham, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.2 miles away.

measured now3 instruments

measured daily2 instruments

Mendham 0.9 NNJ-MS-76

In a volunteer observer's own ground/0.2 mi away/602 ft/5 ft below here

precip, snowfall, snow depth

Rank-

DenvilleDNVN4

At a cooperative observer's station/10.0 mi away/512 ft/95 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Morristown Muni, drawn

The nearest airport reporting now, 9.7 mi from Mendham, New Jersey. From its report of Oct 16, 2026, 4:35 AM local time: 3 of its 6 sheets.

The sky

Broken at 2,100 ft, broken at 2,600 ft, overcast at 3,500 ft; the ceiling is 2,100 ft; visibility 10 mi or more.

Section of the sky over Morristown Muni, height above the station to scale: broken cloud with its base at 2,100 feet, broken cloud with its base at 2,600 feet, overcast cloud with its base at 3,500 feet, the ceiling at 2,100 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 STATION01,0002,0003,0004,0005,0006,000ETAGESLOWTHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETOVC 3,500 FTOVERCAST, 8 EIGHTHS OF THE SKYBKN 2,600 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYBKN 2,100 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYCEILING 2,100 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEMorristown Muni, the skySTATION REPORT · ASOS MMUTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-MMU-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

55.4 F with a dew point of 55.4 F, 100 per cent relative humidity. The air is saturated at the ground; the lowest cloud reported is at 2,100 ft.

Chart of the air at Morristown Muni: temperature 55.4 degrees Fahrenheit and dew point 55.4, 100 per cent relative humidity; the air saturated at the ground, against the lowest cloud reported at 2,100 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 STATION01,0002,0003,00040 F50 F60 F70 FSATURATED AT THE GROUNDLOWEST CLOUD REPORTED, BKN 2,100 FTTEMPERATURE AND DEW POINT 55.4 F, 55.4 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 POINTTITLEMorristown Muni, the airSTATION REPORT · ASOS MMUTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-MMU-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

Calm.

Plan of the wind at Morristown Muni, north up: calm; beside it the Beaufort scale from calm to hurricane force, force 0, calm, 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 STATIONCALMBEAUFORT FORCELEAST WIND, MPH0CALM0NOW, 0 MPH1LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEMorristown Muni, the windSTATION REPORT · ASOS MMUTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-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), 10.0 miles from here, read 12 Oct, 08:00. measured daily

Elsewhere in New Jersey

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

Near Mendham

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

Near Mendham

River and lake gauges