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Williamson, Iowa

City in Lucas County, Iowa

Air quality

The air at Williamson

Index 14, good, led by ozone. Read at 10 PM from its reporting area, Des Moines (IA), 37 miles off.

14Good
  • Fine particles (PM2.5)11Good-
  • Ozone14Good-

The days ahead

Highest moderate, today, led by fine particles. Yesterday measured 20, good.

Smoke, the next 46 hours

No smoke near the ground through Sat 7 PM.

FriSat

Precipitation

What has fallen at Williamson

0.33 in in the last 24 hours, and none in the 2 days before, to Thu 9 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.33in
Last 3 days
0.33in

Visibility

How far you can see at Williamson, the next 46 hours

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

FriSat

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

What is measuring near here

The 7 instruments nearest Williamson, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.3 miles away.

measured now5 instruments

CharitonCNC

At an airfield/7.3 mi away/1,047 ft/21 ft above here

temp, wind, gust, visibility, precip, pressure

Rank157of 1,060

measured daily2 instruments

Williamson 0.3 NIA-LC-10

In a volunteer observer's own ground/0.3 mi away/1,022 ft/4 ft below here

precip, snowfall, snow depth

Rank-

Chariton 1 ECHRI4

At a cooperative observer's station/6.9 mi away/974 ft/52 ft below here

snowfall, snow depth, precip, high, low

Rank19of 1,060

Station report

The weather at Chariton, drawn

The nearest airport reporting now, 7.3 mi from Williamson, Iowa. From its report of Oct 15, 2026, 10:15 PM local time: 3 of its 6 sheets.

The sky

Broken at 1,600 ft, broken at 2,000 ft, overcast at 3,900 ft; the ceiling is 1,600 ft; visibility 10 mi or more.

Section of the sky over Chariton, height above the station to scale: broken cloud with its base at 1,600 feet, broken cloud with its base at 2,000 feet, overcast cloud with its base at 3,900 feet, the ceiling at 1,600 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT CNCFIG. A THE SKY OVER CHARITONSECTION, 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 STATION01,0002,0003,0004,0005,0006,000ETAGESLOWTHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETOVC 3,900 FTOVERCAST, 8 EIGHTHS OF THE SKYBKN 2,000 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYBKN 1,600 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYCEILING 1,600 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEChariton, the skySTATION REPORT · ASOS CNCTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-CNC-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

51.8 F with a dew point of 48.2 F, 87 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 800 ft up; the lowest cloud reported is at 1,600 ft.

Chart of the air at Chariton: temperature 51.8 degrees Fahrenheit and dew point 48.2, 87 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 800 feet above the station, against the lowest cloud reported at 1,600 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT CNCFIG. B THE AIR AT CHARITONTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00040 F50 F60 FSATURATES 800 FT ABOVE THE STATION, AT 47.4 FLOWEST CLOUD REPORTED, BKN 1,600 FTTEMPERATURE 51.8 FDEW POINT 48.2 FSPREAD 3.6 FRELATIVE HUMIDITY 87 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 POINTTITLEChariton, the airSTATION REPORT · ASOS CNCTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-CNC-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the northwest (310 degrees) at 21 mph, gusting 30 mph: force 5, a fresh breeze on the Beaufort scale. The strongest gust today was 35 mph.

Plan of the wind at Chariton, north up: blowing from 310 degrees, the northwest, at 21 miles an hour, gusting 30; beside it the Beaufort scale from calm to hurricane force, force 5, fresh breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT CNCFIG. C THE WIND AT CHARITONPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 310°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE19NOW, 21 MPH6STRONG BREEZE25GUST, 30 MPH7NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEChariton, the windSTATION REPORT · ASOS CNCTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-CNC-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

-

Snow on the ground

Elsewhere in Iowa

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

Near Williamson

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

Near Williamson

River and lake gauges