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North Sioux City, South Dakota

City in Union County, South Dakota

Air quality

The air at North Sioux City

Index 25, good, led by ozone. Read at 9 PM from its reporting area, Sioux City (IA), 6 miles off.

25Good
  • Ozone25Good-

The days ahead

Yesterday measured 19, good.

Smoke, the next 41 hours

No smoke near the ground through Sun 1 PM.

SatSun

Precipitation

What has fallen at North Sioux City

None in the last 24 hours; 0.54 in over the last 3 days, to Fri 8 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.00in
Last 3 days
0.54in

Visibility

How far you can see at North Sioux City, the next 41 hours

Visibility stays 10 miles or more through Sun 1 PM.

SatSun

On the radar over North Sioux City, South DakotaReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 4 instruments nearest North Sioux City, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.4 miles away.

measured now2 instruments

SD RWIS North Sioux CitySD050

Beside a road/2.8 mi away/1,112 ft/3 ft above here

temp, pavement temp, wind, visibility, precip

Rank-

VermillionVMR

At an airfield/27.1 mi away/1,145 ft/36 ft above here

temp, wind, gust, visibility, precip, pressure

Rank409of 817

measured daily2 instruments

North Sioux City 1.4 WNWSD-UN-3

In a volunteer observer's own ground/1.4 mi away/1,106 ft/3 ft below here

precip, snowfall, snow depth

Rank-

VermillionVRMS2

At a cooperative observer's station/26.3 mi away/1,138 ft/29 ft above here

snowfall, snow depth, precip, high, low

Rank56of 817

Station report

The weather at Vermillion, drawn

The nearest airport reporting now, 27.1 mi from North Sioux City, South Dakota. From its report of Oct 16, 2026, 9:15 PM local time: 3 of its 6 sheets.

The sky

No cloud below 12,000 ft; visibility 10 mi or more.

Section of the sky over Vermillion, height above the station to scale: no cloud detected below 12,000 feet, the reach of its ceilometer, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT VMRFIG. A THE SKY OVER VERMILLIONSECTION, 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 SHEETNO CLOUD DETECTED BELOW 12,000 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEVermillion, the skySTATION REPORT · ASOS VMRTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-17IDSR-VMR-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

41.0 F with a dew point of 33.8 F, 75 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,600 ft up.

Chart of the air at Vermillion: temperature 41.0 degrees Fahrenheit and dew point 33.8, 75 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,600 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT VMRFIG. B THE AIR AT VERMILLIONTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00020 F30 F40 F50 FSATURATES 1,600 FT ABOVE THE STATION, AT 32.2 FTEMPERATURE 41.0 FDEW POINT 33.8 FSPREAD 7.2 FRELATIVE HUMIDITY 75 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 POINTTITLEVermillion, the airSTATION REPORT · ASOS VMRTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-17IDSR-VMR-2DRAWN AS linework on paperSOURCES 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 38 mph.

Plan of the wind at Vermillion, 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 VMRFIG. C THE WIND AT VERMILLIONPLAN, 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 FORCE73TITLEVermillion, the windSTATION REPORT · ASOS VMRTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-17IDSR-VMR-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

0in

Snow on the ground

Measured at Vermillion (VRMS2), 26.3 miles from here, read 16 Oct, 15:00. measured daily

Elsewhere in South Dakota

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

Near North Sioux City

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

Near North Sioux City

River and lake gauges