Storm Station
Union Mill, Virginia
60° 66°/59°
Overcast· Feels like 60°·Gentle breeze 10 mph NNW
A slight chance of rain showers. Cloudy, with a low around 59. Northwest wind around 13 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
0UV Low
26Air quality
75%Humidity
100%Cloud
Now
3:45 AM
60feels60
now, overcast
Today
Sep 27
6659
27%
16mph
drizzle
Mon
Sep 28
7059
13mph
drizzle light
Tue
Sep 29
7563
overcast
Wed
Sep 30
8261
overcast
Thu
Oct 1
8862
overcast
Fri
Oct 2
8964
13%
drizzle light
Sat
Oct 3
6356
25%
overcast
60°
66°59°
70°59°
75°63°
82°61°
88°62°
89°64°
63°56°

As of 3:45 AM in Union Mill, Virginia.

What is measuring near here

The 4 instruments nearest Union Mill, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 2.3 miles away.

measured now2 instruments

The Glade - Howland DriveGNHV2

At a river or reservoir gauge/8.1 mi away/295 ft/109 ft below here

temp, wind, gust, humidity, pressure

Rank531of 731

Washington/DullesIAD

At an airfield/8.7 mi away/322 ft/82 ft below here

temp, wind, gust, visibility, precip, pressure

Rank17of 731

measured daily2 instruments

Centreville 1.3 SEVA-FX-20

In a volunteer observer's own ground/2.3 mi away/400 ft/4 ft below here

precip, snowfall, snow depth

Rank-

ManassasMNNV2

At a cooperative observer's station/8.0 mi away/256 ft/148 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Washington/Dulles, drawn

The nearest airport reporting now, 8.7 mi from Union Mill. From its report of Sep 27, 2026, 2:52 AM local time: 3 of its 6 sheets.

The sky

Overcast at 4,600 ft; the ceiling is 4,600 ft; visibility 10 mi or more.

Section of the sky over Washington/Dulles, height above the station to scale: overcast cloud with its base at 4,600 feet, the ceiling at 4,600 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT IADFIG. A THE SKY OVER WASHINGTON/DULLESSECTION, 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 4,600 FTOVERCAST, 8 EIGHTHS OF THE SKYCEILING 4,600 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEWashington/Dulles, the skySTATION REPORT · ASOS IADTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-09-27IDSR-IAD-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

62.0 F with a dew point of 51.0 F, 67 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 2,500 ft up; the lowest cloud reported is at 4,600 ft.

Chart of the air at Washington/Dulles: temperature 62.0 degrees Fahrenheit and dew point 51.0, 67 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 2,500 feet above the station, against the lowest cloud reported at 4,600 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT IADFIG. B THE AIR AT WASHINGTON/DULLESTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,0005,0006,00040 F50 F60 F70 FSATURATES 2,500 FT ABOVE THE STATION, AT 48.5 FLOWEST CLOUD REPORTED, OVC 4,600 FTTEMPERATURE 62.0 FDEW POINT 51.0 FSPREAD 11.0 FRELATIVE HUMIDITY 67 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 POINTTITLEWashington/Dulles, the airSTATION REPORT · ASOS IADTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-09-27IDSR-IAD-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the northwest (320 degrees) at 10 mph: force 3, a gentle breeze on the Beaufort scale.

Plan of the wind at Washington/Dulles, north up: blowing from 320 degrees, the northwest, at 10 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 IADFIG. C THE WIND AT WASHINGTON/DULLESPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 320°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE8NOW, 10 MPH4MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEWashington/Dulles, the windSTATION REPORT · ASOS IADTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-09-27IDSR-IAD-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Washington/Dulles, in 6 sheets, each beside the Field Book plates that explain it

-in

Snow on the ground

Elsewhere in Virginia

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

Near Union Mill

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