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Chambersburg, Pennsylvania

Borough in Franklin County, Pennsylvania

Air quality

The air at Chambersburg

Index 33, good, led by ozone. Read at 2 PM from its reporting area, Hagerstown Region (MD), 26 miles off.

33Good
  • Fine particles (PM2.5)21Good18.7 mi
  • Ozone33Good39 ppb10 mi

The days ahead

Good each day through Wed Oct 21, led by fine particles. Yesterday measured 18, good.

Smoke, the next 43 hours

Little smoke near the ground through Sun 8 AM: the index from smoke stays at 6 or under.

FriSatSun

Precipitation

What has fallen at Chambersburg

0.05 in in the last 24 hours, 0.13 in over the last 3 days, to Fri 1 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.05in
Last 3 days
0.13in

Visibility

How far you can see at Chambersburg, the next 43 hours

Visibility stays 10 miles or more through Sun 8 AM.

FriSatSun

On the radar over Chambersburg, PennsylvaniaReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 6 instruments nearest Chambersburg, 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 now4 instruments

Big KnobBGNP1

At a river or reservoir gauge/29.9 mi away/2,159 ft/1,537 ft above here

temp, wind, gust, humidity, pressure

Rank268of 1,383

measured daily2 instruments

Chambersburg 0.2 NNWPA-FN-4

In a volunteer observer's own ground/0.2 mi away/633 ft/11 ft above here

precip, snowfall, snow depth

Rank-

Chambersburg 1 ESECHMP1

At a cooperative observer's station/1.0 mi away/643 ft/21 ft above here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Liberty - Raven Rock, drawn

The nearest airport reporting now, 18.6 mi from Chambersburg, Pennsylvania. From its report of Oct 16, 2026, 1:55 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 Liberty - Raven Rock, 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 XIFFIG. A THE SKY OVER LIBERTY - RAVEN ROCKSECTION, 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 MORE0510TITLELiberty - Raven Rock, the skySTATION REPORT · ASOS XIFTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-XIF-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

79.0 F with a dew point of 66.7 F, 66 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 2,900 ft up.

Chart of the air at Liberty - Raven Rock: temperature 79.0 degrees Fahrenheit and dew point 66.7, 66 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 2,900 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT XIFFIG. B THE AIR AT LIBERTY - RAVEN ROCKTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,00050 F60 F70 F80 F90 FSATURATES 2,900 FT ABOVE THE STATION, AT 63.8 FTEMPERATURE 79.0 FDEW POINT 66.7 FSPREAD 12.3 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 POINTTITLELiberty - Raven Rock, the airSTATION REPORT · ASOS XIFTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-XIF-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the south southwest (200 degrees) at 8 mph: force 3, a gentle breeze on the Beaufort scale.

Plan of the wind at Liberty - Raven Rock, north up: blowing from 200 degrees, the south southwest, at 8 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 3, gentle breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT XIFFIG. C THE WIND AT LIBERTY - RAVEN ROCKPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 200°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE8NOW, 8 MPH4MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLELiberty - Raven Rock, the windSTATION REPORT · ASOS XIFTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-XIF-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Liberty - Raven Rock, in 6 sheets, each beside the Field Book plates that explain it

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Snow on the ground

Elsewhere in Pennsylvania

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

Near Chambersburg

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

Near Chambersburg

River and lake gauges