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Northwest Harwich, Massachusetts

Community in Barnstable County, Massachusetts

Air quality

The air at Northwest Harwich

Index 30, good, led by ozone. Read at 5 AM from its reporting area, Cape Cod and Islands (MA), 13 miles off.

30Good
  • Ozone30Good-

The days ahead

Good each day through Sat Oct 17, led by fine particles. Yesterday measured 30, good.

Smoke, the next 45 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 Northwest Harwich

None in the last 24 hours; 0.10 in over the last 3 days, to Fri 5 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.00in
Last 3 days
0.10in

Visibility

How far you can see at Northwest Harwich, the next 45 hours

Dense fog: visibility falls to 0.1 miles Fri 3 PM, under a mile for 7 hours.

FriSat

On the radar over Northwest Harwich, MassachusettsReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 6 instruments nearest Northwest Harwich, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.1 miles away.

measured now4 instruments

measured daily2 instruments

Harwich 2.3 WNWMA-BA-55

In a volunteer observer's own ground/1.1 mi away/53 ft/11 ft above here

precip, snowfall, snow depth

Rank-

Wpc FacilityHYSM3

At a cooperative observer's station/10.2 mi away/43 ft/1 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, 5.8 mi from Northwest Harwich, Massachusetts. From its report of Oct 16, 2026, 4:52 AM 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

54.0 F with a dew point of 43.0 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.

Chart of the air at Chatham Muni Arpt: temperature 54.0 degrees Fahrenheit and dew point 43.0, 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; 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 STATION01,0002,0003,0004,00030 F40 F50 F60 FSATURATES 2,500 FT ABOVE THE STATION, AT 40.6 FTEMPERATURE 54.0 FDEW POINT 43.0 FSPREAD 11.0 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 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-002, FB-ENG-011, FB-ENG-005

The wind

From the south (170 degrees) at 7 mph: force 2, a light breeze on the Beaufort scale.

Plan of the wind at Chatham Muni Arpt, north up: blowing from 170 degrees, the south, at 7 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 CQXFIG. C THE WIND AT CHATHAM MUNI ARPTPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 170°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE4NOW, 7 MPH3GENTLE 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), 10.2 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 Northwest Harwich

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

Near Northwest Harwich

River and lake gauges