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Dennis Port, Massachusetts

Community in Barnstable County, Massachusetts

Air quality

The air at Dennis Port

Index 24, good, led by ozone. Read at 11 PM from its reporting area, Cape Cod and Islands (MA), 11 miles off.

24Good
  • Ozone24Good-

The days ahead

Good each day through Sat Oct 17, led by fine particles. Yesterday measured 43, good.

Smoke, the next 46 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 Dennis Port

None in the last 24 hours; 0.07 in over the last 3 days, to Thu 10 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.00in
Last 3 days
0.07in

Visibility

How far you can see at Dennis Port, the next 46 hours

Dense fog: visibility falls to 0 miles Fri 9 PM, under a mile for 8 hours.

FriSat

On the radar over Dennis Port, MassachusettsReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 6 instruments nearest Dennis Port, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.2 miles away.

measured now4 instruments

measured daily2 instruments

Harwich 0.8 SSWMA-BA-39

In a volunteer observer's own ground/2.9 mi away/47 ft/32 ft above here

precip, snowfall, snow depth

Rank-

Wpc FacilityHYSM3

At a cooperative observer's station/8.7 mi away/43 ft/28 ft above here

snowfall, snow depth, precip, high, low

Rank350of 744

Station report

The weather at Chatham Muni Arpt, drawn

The nearest airport reporting now, 7.3 mi from Dennis Port, Massachusetts. From its report of Oct 15, 2026, 10:52 PM local time: 3 of its 6 sheets.

The sky

No cloud below 12,000 ft; visibility 10 mi or more.

Section of the sky over Chatham Muni Arpt, height above the station to scale: no cloud detected below 12,000 feet, the reach of its ceilometer, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT CQXFIG. A THE SKY OVER CHATHAM MUNI ARPTSECTION, 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 SHEETNO CLOUD DETECTED BELOW 12,000 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEChatham Muni Arpt, the skySTATION REPORT · ASOS CQXTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-CQX-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

42.0 F with a dew point of 40.0 F, 93 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 500 ft up.

Chart of the air at Chatham Muni Arpt: temperature 42.0 degrees Fahrenheit and dew point 40.0, 93 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 500 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT CQXFIG. B THE AIR AT CHATHAM MUNI ARPTTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00030 F40 F50 FSATURATES 500 FT ABOVE THE STATION, AT 39.5 FTEMPERATURE AND DEW POINT 42.0 F, 40.0 FRELATIVE HUMIDITY 93 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 POINTTITLEChatham Muni Arpt, the airSTATION REPORT · ASOS CQXTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-CQX-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 Chatham Muni Arpt, 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 CQXFIG. C THE WIND AT CHATHAM MUNI ARPTPLAN, 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 FORCE73TITLEChatham Muni Arpt, the windSTATION REPORT · ASOS CQXTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-CQX-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

0in

Snow on the ground

Measured at Wpc Facility (HYSM3), 8.7 miles from here, read 15 Oct, 08:33. measured daily

Elsewhere in Massachusetts

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

Near Dennis Port

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

Near Dennis Port

River and lake gauges