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Petersham, Massachusetts

Community in Worcester County, Massachusetts

Air quality

The air at Petersham

Index 31, good, led by fine particles. Read at 11 PM from its reporting area, Worcester (MA), 17 miles off.

31Good
  • Fine particles (PM2.5)31Good-
  • Ozone23Good-
  • Coarse particles (PM10)13Good-

The days ahead

Good each day through Sat Oct 17, led by fine particles. Yesterday measured 33, good.

Smoke, the next 46 hours

No smoke near the ground through Sat 8 PM.

FriSat

Precipitation

What has fallen at Petersham

None in the last 24 hours; 0.04 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
0.04in

Visibility

How far you can see at Petersham, the next 46 hours

Mist or haze: visibility falls to 1 mile Fri 9 AM.

FriSat

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

What is measuring near here

The 6 instruments nearest Petersham, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 3.2 miles away.

measured now4 instruments

Orange (ASOS)ORE

At an airfield/7.6 mi away/538 ft/503 ft below here

temp, wind, gust, visibility, precip, pressure

Rank5of 744

measured daily2 instruments

Barre 1.4 NNEMA-WR-54

In a volunteer observer's own ground/5.7 mi away/964 ft/77 ft below here

precip, snowfall, snow depth

Rank36of 744

Barre Falls DamBARM3

At a dam/9.2 mi away/814 ft/227 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Orange (ASOS), drawn

The nearest airport reporting now, 7.6 mi from Petersham, Massachusetts. From its report of Oct 15, 2026, 10:52 PM local time: 3 of its 6 sheets.

The sky

No cloud reported; visibility 10 mi or more.

Section of the sky over Orange (ASOS), height above the station to scale: no cloud reported, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT OREFIG. A THE SKY OVER ORANGE (ASOS)SECTION, 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 REPORTEDVISIBILITY, MILES: 10 MI OR MORE0510TITLEOrange (ASOS), the skySTATION REPORT · ASOS ORETYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-ORE-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 Orange (ASOS): 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 OREFIG. B THE AIR AT ORANGE (ASOS)THE 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 39.6 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 POINTTITLEOrange (ASOS), the airSTATION REPORT · ASOS ORETYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-ORE-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 Orange (ASOS), 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 OREFIG. C THE WIND AT ORANGE (ASOS)PLAN, 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 FORCE73TITLEOrange (ASOS), the windSTATION REPORT · ASOS ORETYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-ORE-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Orange (ASOS), in 6 sheets, each beside the Field Book plates that explain it

0in

Snow on the ground

Measured at Barre Falls Dam (BARM3), 9.2 miles from here, read 15 Oct, 08:00. measured daily

Elsewhere in Massachusetts

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

Near Petersham

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

Near Petersham

River and lake gauges