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Damascus, Maryland

Community in Montgomery County, Maryland

Air quality

The air at Damascus

Index 31, good, led by ozone. Read at 7 PM from its reporting area, Maryland Piedmont (MD), 15 miles off.

31Good
  • Fine particles (PM2.5)-21.4 mi
  • Ozone31Good26 ppb12.1 mi
  • Nitrogen dioxide3Good3.1 ppb23.1 mi
  • Sulfur dioxide0Good0.2 ppb23.1 mi
  • Carbon monoxide-0.2 ppm21.4 mi

The days ahead

Good each day through Wed Oct 21, led by fine particles. Yesterday measured 19, good.

Smoke, the next 43 hours

No smoke near the ground through Sun 2 PM.

FriSatSun

Precipitation

What has fallen at Damascus

0.11 in in the last 24 hours, 0.18 in over the last 3 days, to Fri 7 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.11in
Last 3 days
0.18in

Visibility

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

Visibility stays 10 miles or more through Sun 2 PM.

FriSatSun

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

What is measuring near here

The 7 instruments nearest Damascus, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.1 miles away.

measured now5 instruments

GaithersburgGAI

At an airfield/7.1 mi away/539 ft/208 ft below here

temp, wind, gust, visibility, precip, pressure

Rank83of 742

Powder MillS2049

At a soil climate station/25.8 mi away/105 ft/642 ft below here

temp, humidity, soil temp, soil moisture

Rank726of 742

measured daily2 instruments

Damascus 0.8 SMD-MG-90

In a volunteer observer's own ground/0.1 mi away/742 ft/5 ft below here

precip, snowfall, snow depth

Rank-

Damascus 3 SSWDMAM2

At a cooperative observer's station/1.2 mi away/676 ft/71 ft below here

snowfall, snow depth, precip, high, low

Rank27of 742

Station report

The weather at Gaithersburg, drawn

The nearest airport reporting now, 7.1 mi from Damascus, Maryland. From its report of Oct 16, 2026, 7:56 PM local time: 3 of its 6 sheets.

The sky

Scattered at 7,000 ft, scattered at 10,000 ft, broken at 12,000 ft; the ceiling is 12,000 ft; visibility 10 mi or more.

Section of the sky over Gaithersburg, height above the station to scale: scattered cloud with its base at 7,000 feet, scattered cloud with its base at 10,000 feet, broken cloud with its base at 12,000 feet, the ceiling at 12,000 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT GAIFIG. A THE SKY OVER GAITHERSBURGSECTION, 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 STATION02,5005,0007,50010,00012,50015,00017,50020,000ETAGESLOWMIDDLEHIGHTHE STATIONTHE CEILOMETER READS TO 12,000 FTBKN 12,000 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYSCT 10,000 FTSCATTERED, 3 TO 4 EIGHTHS OF THE SKYSCT 7,000 FTSCATTERED, 3 TO 4 EIGHTHS OF THE SKYCEILING 12,000 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEGaithersburg, the skySTATION REPORT · ASOS GAITYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-GAI-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-013, FB-SKY-014

The air

62.0 F with a dew point of 62.0 F, 100 per cent relative humidity. The air is saturated at the ground; the lowest cloud reported is at 7,000 ft.

Chart of the air at Gaithersburg: temperature 62.0 degrees Fahrenheit and dew point 62.0, 100 per cent relative humidity; the air saturated at the ground, against the lowest cloud reported at 7,000 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT GAIFIG. B THE AIR AT GAITHERSBURGTHE 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 GROUNDABOVE THIS SHEET: LOWEST CLOUD REPORTED, SCT 7,000 FTTEMPERATURE AND DEW POINT 62.0 F, 62.0 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 POINTTITLEGaithersburg, the airSTATION REPORT · ASOS GAITYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-GAI-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the west northwest (300 degrees) at 5 mph: force 2, a light breeze on the Beaufort scale. The strongest gust today was 20 mph.

Plan of the wind at Gaithersburg, north up: blowing from 300 degrees, the west northwest, 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 GAIFIG. C THE WIND AT GAITHERSBURGPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 300°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE4NOW, 5 MPH3GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEGaithersburg, the windSTATION REPORT · ASOS GAITYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-GAI-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Gaithersburg, 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 Damascus

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

Near Damascus

River and lake gauges