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Chevy Chase, Maryland

Town in Montgomery County, Maryland

Air quality

The air at Chevy Chase

Index 25, good, led by fine particles. Read at 8 AM from its reporting area, Northern Virginia and DC (DC), 6 miles off.

25Good
  • Fine particles (PM2.5)25Good5.4 mi
  • Ozone17Good12 ppb3.5 mi
  • Coarse particles (PM10)-14.3 mi
  • Nitrogen dioxide4Good4.7 ppb3.5 mi
  • Sulfur dioxide0Good0 ppb12 mi
  • Carbon monoxide-0.3 ppm5.4 mi

The days ahead

Good each day through Sun Oct 18, led by fine particles. Yesterday measured 23, good.

Smoke, the next 43 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 Chevy Chase

0.05 in in the last 24 hours, and none in the 2 days before, to Fri 7 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.05in
Last 3 days
0.05in

Visibility

How far you can see at Chevy Chase, the next 43 hours

Visibility stays 7 miles or more through Sun 2 AM, lowest 8 miles Fri 8 AM.

FriSat

On the radar over Chevy Chase, MarylandReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 7 instruments nearest Chevy Chase, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.3 miles away.

measured now5 instruments

College ParkCGS

At an airfield/8.6 mi away/48 ft/254 ft below here

temp, wind, gust, visibility, precip, pressure

Rank97of 736

Powder MillS2049

At a soil climate station/12.7 mi away/105 ft/197 ft below here

temp, humidity, soil temp, soil moisture

Rank734of 736

measured daily2 instruments

BeltsvilleBTVM2

At a cooperative observer's station/11.2 mi away/138 ft/164 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at College Park, drawn

The nearest airport reporting now, 8.6 mi from Chevy Chase, Maryland. From its report of Oct 16, 2026, 7:55 AM local time: 3 of its 6 sheets.

The sky

Overcast at 500 ft; the ceiling is 500 ft; visibility 10 mi or more.

Section of the sky over College Park, height above the station to scale: overcast cloud with its base at 500 feet, the ceiling at 500 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT CGSFIG. A THE SKY OVER COLLEGE PARKSECTION, 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 SHEETOVC 500 FTOVERCAST, 8 EIGHTHS OF THE SKYCEILING 500 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLECollege Park, the skySTATION REPORT · ASOS CGSTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-CGS-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

63.5 F with a dew point of 62.0 F, 95 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 300 ft up; the lowest cloud reported is at 500 ft.

Chart of the air at College Park: temperature 63.5 degrees Fahrenheit and dew point 62.0, 95 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 300 feet above the station, against the lowest cloud reported at 500 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT CGSFIG. B THE AIR AT COLLEGE PARKTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00050 F60 F70 FSATURATES 300 FT ABOVE THE STATION, AT 61.6 FLOWEST CLOUD REPORTED, OVC 500 FTTEMPERATURE AND DEW POINT 63.5 F, 62.0 FRELATIVE HUMIDITY 95 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 POINTTITLECollege Park, the airSTATION REPORT · ASOS CGSTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-CGS-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the south (190 degrees) at 5 mph: force 2, a light breeze on the Beaufort scale.

Plan of the wind at College Park, north up: blowing from 190 degrees, the south, at 5 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 CGSFIG. C THE WIND AT COLLEGE PARKPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 190°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE4NOW, 5 MPH3GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLECollege Park, the windSTATION REPORT · ASOS CGSTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-CGS-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of College Park, in 6 sheets, each beside the Field Book plates that explain it

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Snow on the ground

Elsewhere in Maryland

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

Near Chevy Chase

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

Near Chevy Chase

River and lake gauges