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Decatur, Iowa

City in Decatur County, Iowa

Air quality

The air at Decatur

Index 19, good, led by fine particles. Read at 3 AM from its reporting area, Des Moines (IA), 56 miles off.

19Good
  • Fine particles (PM2.5)19Good-
  • Ozone19Good-

The days ahead

Good each day through Sat Oct 17, led by fine particles. Yesterday measured 17, good.

Smoke, the next 41 hours

No smoke near the ground through Sat 7 PM.

FriSat

Precipitation

What has fallen at Decatur

0.19 in in the last 24 hours, 0.20 in over the last 3 days, to Fri 2 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.19in
Last 3 days
0.20in

Visibility

How far you can see at Decatur, the next 41 hours

Visibility stays 7 miles or more through Sat 7 PM, lowest 8 miles Sat 5 AM.

FriSat

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

What is measuring near here

The 5 instruments nearest Decatur, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.5 miles away.

measured now3 instruments

LamoniLWD

At an airfield/8.5 mi away/1,093 ft/32 ft below here

temp, wind, gust, visibility, precip, pressure

Rank154of 1,060

measured daily2 instruments

Leon 4.2 EIA-DC-9

In a volunteer observer's own ground/8.3 mi away/1,064 ft/61 ft below here

precip, snowfall, snow depth

Rank-

Lamoni3OI

At a cooperative observer's station/10.3 mi away/1,128 ft/3 ft above here

snowfall, snow depth, precip, high, low

Rank794of 1,060

Station report

The weather at Lamoni, drawn

The nearest airport reporting now, 8.5 mi from Decatur, Iowa. From its report of Oct 16, 2026, 2:53 AM 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 Lamoni, 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 LWDFIG. A THE SKY OVER LAMONISECTION, 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 MORE0510TITLELamoni, the skySTATION REPORT · ASOS LWDTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-LWD-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

43.0 F with a dew point of 38.0 F, 82 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,200 ft up.

Chart of the air at Lamoni: temperature 43.0 degrees Fahrenheit and dew point 38.0, 82 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,200 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT LWDFIG. B THE AIR AT LAMONITHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00030 F40 F50 FSATURATES 1,200 FT ABOVE THE STATION, AT 36.9 FTEMPERATURE 43.0 FDEW POINT 38.0 FSPREAD 5.0 FRELATIVE HUMIDITY 82 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 POINTTITLELamoni, the airSTATION REPORT · ASOS LWDTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-LWD-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the west northwest (290 degrees) at 10 mph: force 3, a gentle breeze on the Beaufort scale. The strongest gust today was 28 mph.

Plan of the wind at Lamoni, north up: blowing from 290 degrees, the west 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 LWDFIG. C THE WIND AT LAMONIPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 290°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE8NOW, 10 MPH4MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLELamoni, the windSTATION REPORT · ASOS LWDTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-LWD-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Lamoni, 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 Decatur

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

Near Decatur

River and lake gauges