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Grafton, Iowa

City in Worth County, Iowa

Air quality

The air at Grafton

Index 18, good, led by fine particles. Read at 5 AM from its reporting area, Rochester Area (MN), 56 miles off.

18Good
  • Fine particles (PM2.5)18Good-
  • Ozone13Good-

The days ahead

Good each day through Sun Oct 18, led by fine particles. Yesterday measured 19, good.

Smoke, the next 45 hours

No smoke near the ground through Sun 1 AM.

FriSat

Precipitation

What has fallen at Grafton

1.25 in in the last 24 hours, and none in the 2 days before, to Fri 4 AM. Measured by radar and rain gauges, as water.

Last 24 hours
1.25in
Last 3 days
1.25in

Visibility

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

Visibility stays 7 miles or more through Sun 1 AM, lowest 8 miles Fri 6 AM.

FriSat

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

What is measuring near here

The 5 instruments nearest Grafton, 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 now3 instruments

Mason CityMCW

At an airfield/17.8 mi away/1,214 ft/12 ft below here

temp, wind, gust, visibility, precip, pressure

Rank10of 1,060

measured daily2 instruments

Grafton 0.4 SEIA-WT-1

In a volunteer observer's own ground/0.3 mi away/1,227 ft/1 ft above here

precip, snowfall, snow depth

Rank-

St AnsgarSANI4

At a cooperative observer's station/8.1 mi away/1,138 ft/88 ft below here

snowfall, snow depth, precip, high, low

Rank685of 1,060

Station report

The weather at Mason City, drawn

The nearest airport reporting now, 17.8 mi from Grafton, Iowa. From its report of Oct 16, 2026, 5:40 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 Mason City, 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 MCWFIG. A THE SKY OVER MASON CITYSECTION, 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 MI0510TITLEMason City, the skySTATION REPORT · ASOS MCWTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-MCW-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

45.0 F with a dew point of 43.0 F, 93 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 500 ft up; the lowest cloud reported is at 800 ft.

Chart of the air at Mason City: temperature 45.0 degrees Fahrenheit and dew point 43.0, 93 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 500 feet above the station, against the lowest cloud reported at 800 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MCWFIG. B THE AIR AT MASON CITYTHE 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 F60 FSATURATES 500 FT ABOVE THE STATION, AT 42.5 FLOWEST CLOUD REPORTED, OVC 800 FTTEMPERATURE AND DEW POINT 45.0 F, 43.0 FRELATIVE HUMIDITY 93 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 POINTTITLEMason City, the airSTATION REPORT · ASOS MCWTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-MCW-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 20 mph, gusting 28 mph: force 5, a fresh breeze on the Beaufort scale. The strongest gust today was 32 mph.

Plan of the wind at Mason City, north up: blowing from 310 degrees, the northwest, at 20 miles an hour, gusting 28; beside it the Beaufort scale from calm to hurricane force, force 5, fresh breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MCWFIG. C THE WIND AT MASON CITYPLAN, 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, 20 MPH6STRONG BREEZE25GUST, 28 MPH7NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEMason City, the windSTATION REPORT · ASOS MCWTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-MCW-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

0in

Snow on the ground

Measured at St Ansgar (SANI4), 8.1 miles from here, read 15 Oct, 06:30. measured daily

Elsewhere in Iowa

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

Near Grafton

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

Near Grafton

River and lake gauges