Storm Station
Altamont, South Dakota
63°
Overcast· Feels like 63°·Light breeze 6 mph S
Areas of fog. Mostly cloudy. Low around 58, with temperatures rising to around 62 overnight. Southwest wind around 5 mph.
-UV
24Air quality
93%Humidity
92%Cloud

What is measuring near here

The 5 instruments nearest Altamont, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 3.6 miles away.

measured now3 instruments

Sd RWIS AltamontSD593

Beside a road/3.6 mi away/1,732 ft/114 ft below here

temp, pavement temp, wind, visibility, precip

Rank239of 427

WatertownATY

At an airfield/23.3 mi away/1,725 ft/121 ft below here

temp, wind, gust, visibility, precip, pressure

Rank17of 427

Big Sioux River 3 NW WatertownWBSS2

At a river or reservoir gauge/23.4 mi away/1,726 ft/120 ft below here

temp, wind, gust, humidity, pressure

Rank125of 427

measured daily2 instruments

Clear Lake 0.9 SSD-DL-8

In a volunteer observer's own ground/6.0 mi away/1,813 ft/33 ft below here

precip, snowfall, snow depth

Rank-

Watertown-23MI.EseCLKS2

At a cooperative observer's station/6.2 mi away/1,785 ft/61 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Watertown, drawn

The nearest airport reporting now, 23.3 mi from Altamont. From its report of Sep 27, 2026, 1:53 AM local time: 3 of its 6 sheets.

The sky

Overcast at 600 ft; the ceiling is 600 ft; visibility 8 mi.

Section of the sky over Watertown, height above the station to scale: overcast cloud with its base at 600 feet, the ceiling at 600 feet, and visibility of 8 mi.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT ATYFIG. A THE SKY OVER WATERTOWNSECTION, 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 600 FTOVERCAST, 8 EIGHTHS OF THE SKYCEILING 600 FTVISIBILITY, MILES: 8 MI0510TITLEWatertown, the skySTATION REPORT · ASOS ATYTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-09-27IDSR-ATY-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

63.0 F with a dew point of 62.0 F, 97 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 200 ft up; the lowest cloud reported is at 600 ft.

Chart of the air at Watertown: temperature 63.0 degrees Fahrenheit and dew point 62.0, 97 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 200 feet above the station, against the lowest cloud reported at 600 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT ATYFIG. B THE AIR AT WATERTOWNTHE 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 200 FT ABOVE THE STATION, AT 61.7 FLOWEST CLOUD REPORTED, OVC 600 FTTEMPERATURE AND DEW POINT 63.0 F, 62.0 FRELATIVE HUMIDITY 97 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 POINTTITLEWatertown, the airSTATION REPORT · ASOS ATYTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-09-27IDSR-ATY-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the south (180 degrees) at 3 mph: force 1, a light air on the Beaufort scale.

Plan of the wind at Watertown, north up: blowing from 180 degrees, the south, at 3 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 1, light air, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT ATYFIG. C THE WIND AT WATERTOWNPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 180°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR1NOW, 3 MPH2LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEWatertown, the windSTATION REPORT · ASOS ATYTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-09-27IDSR-ATY-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

0in

Snow on the ground

Measured at Watertown-23MI.Ese (CLKS2), 6.2 miles from here, read 26 Sep, 06:30. measured daily

Elsewhere in South Dakota

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

Near Altamont

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