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St. James, Maryland

Community in Washington County, Maryland

Air quality

The air at St. James

Index 21, good, led by ozone. Read at 7 AM from its reporting area, Hagerstown Region (MD), 10 miles off.

21Good
  • Ozone21Good19 ppb1.4 mi

The days ahead

Good each day through Wed Oct 21, led by fine particles. Yesterday measured 34, good.

Smoke, the next 44 hours

No smoke near the ground through Mon 2 AM.

SatSun

Precipitation

What has fallen at St. James

0.09 in in the last 24 hours, 0.17 in over the last 3 days, to Sat 6 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.09in
Last 3 days
0.17in

Visibility

How far you can see at St. James, the next 44 hours

Visibility stays 10 miles or more through Mon 2 AM.

SatSun

On the radar over St. James, MarylandReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 6 instruments nearest St. James, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.4 miles away.

measured now4 instruments

I-70 @ I-81MD011

Beside a road/3.8 mi away/499 ft/19 ft below here

temp, pavement temp, wind, visibility, precip

Rank331of 742

measured daily2 instruments

Funkstown 2.3 SWMD-WH-2

In a volunteer observer's own ground/0.4 mi away/508 ft/10 ft below here

precip, snowfall, snow depth

Rank-

Hagerstown 1EHGCM2

At a cooperative observer's station/4.8 mi away/541 ft/23 ft above here

snowfall, snow depth, precip, high, low

Rank358of 742

Station report

The weather at Hagerstown Regional, drawn

The nearest airport reporting now, 9.1 mi from St. James, Maryland. From its report of Oct 17, 2026, 6:53 AM local time: 3 of its 6 sheets.

The sky

Scattered at 2,900 ft, overcast at 4,200 ft; the ceiling is 4,200 ft; visibility 10 mi or more.

Section of the sky over Hagerstown Regional, height above the station to scale: scattered cloud with its base at 2,900 feet, overcast cloud with its base at 4,200 feet, the ceiling at 4,200 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT HGRFIG. A THE SKY OVER HAGERSTOWN REGIONALSECTION, 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 STATION01,0002,0003,0004,0005,0006,0007,000ETAGESLOWMIDDLETHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETOVC 4,200 FTOVERCAST, 8 EIGHTHS OF THE SKYSCT 2,900 FTSCATTERED, 3 TO 4 EIGHTHS OF THE SKYCEILING 4,200 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEHagerstown Regional, the skySTATION REPORT · ASOS HGRTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-17IDSR-HGR-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

51.0 F with a dew point of 43.0 F, 74 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,800 ft up; the lowest cloud reported is at 2,900 ft.

Chart of the air at Hagerstown Regional: temperature 51.0 degrees Fahrenheit and dew point 43.0, 74 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,800 feet above the station, against the lowest cloud reported at 2,900 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT HGRFIG. B THE AIR AT HAGERSTOWN REGIONALTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,00030 F40 F50 F60 FSATURATES 1,800 FT ABOVE THE STATION, AT 41.2 FLOWEST CLOUD REPORTED, SCT 2,900 FTTEMPERATURE 51.0 FDEW POINT 43.0 FSPREAD 8.0 FRELATIVE HUMIDITY 74 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 POINTTITLEHagerstown Regional, the airSTATION REPORT · ASOS HGRTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-17IDSR-HGR-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the north (350 degrees) at 8 mph: force 3, a gentle breeze on the Beaufort scale. The strongest gust today was 29 mph.

Plan of the wind at Hagerstown Regional, north up: blowing from 350 degrees, the north, 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 HGRFIG. C THE WIND AT HAGERSTOWN REGIONALPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 350°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE8NOW, 8 MPH4MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEHagerstown Regional, the windSTATION REPORT · ASOS HGRTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-17IDSR-HGR-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Hagerstown Regional, 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 St. James

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

Near St. James

River and lake gauges