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Greenville, Iowa

City in Clay County, Iowa

Air quality

The air at Greenville

Index 19, good, led by ozone. Read at 11 PM from its reporting area, Sioux City (IA), 71 miles off.

19Good
  • Fine particles (PM2.5)-24.1 mi
  • Ozone19Good16 ppb24.1 mi

The days ahead

Yesterday measured 14, good.

Smoke, the next 45 hours

No smoke near the ground through Sat 7 PM.

FriSat

Precipitation

What has fallen at Greenville

0.87 in in the last 24 hours, and none in the 2 days before, to Thu 10 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.87in
Last 3 days
0.87in

Visibility

How far you can see at Greenville, the next 45 hours

Visibility stays 7 miles or more through Sat 7 PM, lowest 8 miles Fri 4 AM.

FriSat

On the radar over Greenville, IowaReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 5 instruments nearest Greenville, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 2.0 miles away.

measured now3 instruments

SpencerSPW

At an airfield/11.0 mi away/1,322 ft/68 ft below here

temp, wind, gust, visibility, precip, pressure

Rank193of 1,060

measured daily2 instruments

Spencer 1 N3SE

At a cooperative observer's station/7.9 mi away/1,309 ft/81 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Spencer, drawn

The nearest airport reporting now, 11.0 mi from Greenville, Iowa. From its report of Oct 15, 2026, 10:53 PM local time: 3 of its 6 sheets.

The sky

Broken at 3,700 ft, overcast at 4,400 ft; the ceiling is 3,700 ft; visibility 10 mi or more.

Section of the sky over Spencer, height above the station to scale: broken cloud with its base at 3,700 feet, overcast cloud with its base at 4,400 feet, the ceiling at 3,700 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SPWFIG. A THE SKY OVER SPENCERSECTION, 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 4,400 FTOVERCAST, 8 EIGHTHS OF THE SKYBKN 3,700 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYCEILING 3,700 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLESpencer, the skySTATION REPORT · ASOS SPWTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-SPW-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

47.0 F with a dew point of 38.0 F, 71 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 2,100 ft up; the lowest cloud reported is at 3,700 ft.

Chart of the air at Spencer: temperature 47.0 degrees Fahrenheit and dew point 38.0, 71 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 2,100 feet above the station, against the lowest cloud reported at 3,700 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SPWFIG. B THE AIR AT SPENCERTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,0005,00030 F40 F50 F60 FSATURATES 2,100 FT ABOVE THE STATION, AT 36.0 FLOWEST CLOUD REPORTED, BKN 3,700 FTTEMPERATURE 47.0 FDEW POINT 38.0 FSPREAD 9.0 FRELATIVE HUMIDITY 71 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 POINTTITLESpencer, the airSTATION REPORT · ASOS SPWTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-SPW-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the west northwest (300 degrees) at 17 mph, gusting 30 mph: force 4, a moderate breeze on the Beaufort scale. The strongest gust today was 35 mph.

Plan of the wind at Spencer, north up: blowing from 300 degrees, the west northwest, at 17 miles an hour, gusting 30; beside it the Beaufort scale from calm to hurricane force, force 4, moderate breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SPWFIG. C THE WIND AT SPENCERPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 300°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE13NOW, 17 MPH5FRESH BREEZE196STRONG BREEZE25GUST, 30 MPH7NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLESpencer, the windSTATION REPORT · ASOS SPWTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-SPW-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

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Snow on the ground

Elsewhere in Iowa

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

Near Greenville

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

Near Greenville

River and lake gauges