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Green Valley, Maryland

Community in Frederick County, Maryland

Air quality

The air at Green Valley

Index 15, good, led by ozone. Read at 12 AM from its reporting area, Maryland Piedmont (MD), 10 miles off.

15Good
  • Fine particles (PM2.5)-17.1 mi
  • Ozone15Good9 ppb9.2 mi

The days ahead

Good each day through Sun Oct 18, led by fine particles. Yesterday measured 42, good.

Smoke, the next 44 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 Green Valley

0.15 in in the last 24 hours, and none in the 2 days before, to Fri 12 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.15in
Last 3 days
0.15in

Visibility

How far you can see at Green Valley, the next 44 hours

Mist or haze: visibility falls to 1 mile Fri 6 PM.

FriSat

On the radar over Green Valley, MarylandReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 7 instruments nearest Green Valley, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 4.1 miles away.

measured now5 instruments

Powder MillS2049

At a soil climate station/30.7 mi away/105 ft/551 ft below here

temp, humidity, soil temp, soil moisture

Rank734of 736

measured daily2 instruments

Damascus 3 SSWDMAM2

At a cooperative observer's station/5.3 mi away/676 ft/20 ft above here

snowfall, snow depth, precip, high, low

Rank31of 736

Station report

The weather at Frederick Muni Apt, drawn

The nearest airport reporting now, 8.9 mi from Green Valley, Maryland. From its report of Oct 16, 2026, 12:55 AM local time: 3 of its 6 sheets.

The sky

Overcast at 800 ft; the ceiling is 800 ft; visibility 5 mi.

Section of the sky over Frederick Muni Apt, height above the station to scale: overcast cloud with its base at 800 feet, the ceiling at 800 feet, and visibility of 5 mi.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT FDKFIG. A THE SKY OVER FREDERICK MUNI APTSECTION, 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 800 FTOVERCAST, 8 EIGHTHS OF THE SKYCEILING 800 FTVISIBILITY, MILES: 5 MI0510TITLEFrederick Muni Apt, the skySTATION REPORT · ASOS FDKTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-FDK-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

58.6 F with a dew point of 58.6 F, 100 per cent relative humidity. The air is saturated at the ground; the lowest cloud reported is at 800 ft.

Chart of the air at Frederick Muni Apt: temperature 58.6 degrees Fahrenheit and dew point 58.6, 100 per cent relative humidity; the air saturated at the ground, against the lowest cloud reported at 800 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT FDKFIG. B THE AIR AT FREDERICK MUNI APTTHE 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 FSATURATED AT THE GROUNDLOWEST CLOUD REPORTED, OVC 800 FTTEMPERATURE AND DEW POINT 58.6 F, 58.6 FRELATIVE HUMIDITY 100 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 POINTTITLEFrederick Muni Apt, the airSTATION REPORT · ASOS FDKTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-FDK-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 Frederick Muni Apt, 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 FDKFIG. C THE WIND AT FREDERICK MUNI APTPLAN, 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 FORCE73TITLEFrederick Muni Apt, the windSTATION REPORT · ASOS FDKTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-FDK-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Frederick Muni Apt, 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 Green Valley

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

Near Green Valley

River and lake gauges