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Chatham, New Jersey

Borough in Morris County, New Jersey

Air quality

The air at Chatham

Index 24, good, led by fine particles. Read at 12 AM from its reporting area, Northeast Urban (NJ), 11 miles off.

24Good
  • Fine particles (PM2.5)24Good11.1 mi
  • Ozone20Good18 ppb14.6 mi
  • Nitrogen dioxide23Good24 ppb11.7 mi
  • Sulfur dioxide0Good0 ppb11.7 mi
  • Carbon monoxide-0.2 ppm11.7 mi

The days ahead

Good each day through Today, led by fine particles. Yesterday measured 56, moderate.

Smoke, the next 44 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 Chatham

None in the last 3 days, to Fri 12 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 Chatham, the next 44 hours

Fog: visibility falls to 0.7 miles Fri 7 PM, under a mile for 1 hour.

FriSat

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

What is measuring near here

The 5 instruments nearest Chatham, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.6 miles away.

measured now3 instruments

measured daily2 instruments

Chatham 0.7 NWNJ-MS-127

In a volunteer observer's own ground/0.6 mi away/199 ft/40 ft below here

precip, snowfall, snow depth

Rank-

Canoe BrookCHMN4

At a cooperative observer's station/1.7 mi away/188 ft/51 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Morristown Muni, drawn

The nearest airport reporting now, 4.3 mi from Chatham, New Jersey. From its report of Oct 16, 2026, 12:55 AM local time: 3 of its 6 sheets.

The sky

Overcast at 2,200 ft; the ceiling is 2,200 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 2,200 feet, the ceiling at 2,200 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 STATION05001,0001,5002,0002,5003,0003,500ETAGESLOWTHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETOVC 2,200 FTOVERCAST, 8 EIGHTHS OF THE SKYCEILING 2,200 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

53.6 F with a dew point of 53.6 F, 100 per cent relative humidity. The air is saturated at the ground; the lowest cloud reported is at 2,200 ft.

Chart of the air at Morristown Muni: temperature 53.6 degrees Fahrenheit and dew point 53.6, 100 per cent relative humidity; the air saturated at the ground, against the lowest cloud reported at 2,200 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 FSATURATED AT THE GROUNDLOWEST CLOUD REPORTED, OVC 2,200 FTTEMPERATURE AND DEW POINT 53.6 F, 53.6 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

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Snow on the ground

Elsewhere in New Jersey

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

Near Chatham

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

Near Chatham

River and lake gauges