Storm Station
Rock Valley, Iowa
65°
Light rain· Feels like 65°·Light breeze 6 mph SE
A chance of rain showers and patchy fog. Cloudy, with a low around 62. Southeast wind around 0 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
-UV
-Air quality
100%Humidity
94%Cloud

What is measuring near here

The 5 instruments nearest Rock Valley, 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 now3 instruments

Sioux CountySXK

At an airfield/16.1 mi away/1,414 ft/162 ft above here

temp, wind, gust, visibility, precip, pressure

Rank239of 652

Alton (IA10)RTNI4

Beside a road/17.6 mi away/1,411 ft/159 ft above here

temp, pavement temp, wind, visibility, precip

Rank573of 652

MilnervilleBKTI4

At a river or reservoir gauge/37.6 mi away/1,224 ft/28 ft below here

temp, wind, gust, humidity, pressure

Rank20of 652

measured daily2 instruments

Rock ValleyRKVI4

At a cooperative observer's station/0.4 mi away/1,257 ft/5 ft above here

snowfall, snow depth, precip, high, low

Rank-

Rock Valley 0.4 WSWIA-SX-19

In a volunteer observer's own ground/0.6 mi away/1,249 ft/3 ft below here

precip, snowfall, snow depth

Rank-

Station report

The weather at Sioux County, drawn

The nearest airport reporting now, 16.1 mi from Rock Valley. From its report of Sep 27, 2026, 4:35 AM local time: 3 of its 6 sheets.

The sky

Overcast at 800 ft; the ceiling is 800 ft; visibility 6 mi.

Section of the sky over Sioux County, height above the station to scale: overcast cloud with its base at 800 feet, the ceiling at 800 feet, and visibility of 6 mi.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SXKFIG. A THE SKY OVER SIOUX COUNTYSECTION, 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: 6 MI0510TITLESioux County, the skySTATION REPORT · ASOS SXKTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-09-27IDSR-SXK-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

64.4 F with a dew point of 64.4 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 Sioux County: temperature 64.4 degrees Fahrenheit and dew point 64.4, 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 SXKFIG. B THE AIR AT SIOUX COUNTYTHE 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 F80 FSATURATED AT THE GROUNDLOWEST CLOUD REPORTED, OVC 800 FTTEMPERATURE AND DEW POINT 64.4 F, 64.4 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 POINTTITLESioux County, the airSTATION REPORT · ASOS SXKTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-09-27IDSR-SXK-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the southeast (130 degrees) at 6 mph: force 2, a light breeze on the Beaufort scale.

Plan of the wind at Sioux County, north up: blowing from 130 degrees, the southeast, at 6 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 SXKFIG. C THE WIND AT SIOUX COUNTYPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 130°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE4NOW, 6 MPH3GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLESioux County, the windSTATION REPORT · ASOS SXKTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-09-27IDSR-SXK-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

-in

Snow on the ground

Elsewhere in Iowa

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

Near Rock Valley

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