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Marathon, Iowa

City in Buena Vista County, Iowa

Air quality

The air at Marathon

Index 18, good, led by ozone. Read at 12 AM from its reporting area, Sioux City (IA), 74 miles off.

18Good
  • Fine particles (PM2.5)-23.3 mi
  • Ozone18Good17 ppb23.3 mi

The days ahead

Yesterday measured 14, good.

Smoke, the next 43 hours

No smoke near the ground through Sat 7 PM.

FriSat

Precipitation

What has fallen at Marathon

0.96 in in the last 24 hours, and none in the 2 days before, to Fri 12 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.96in
Last 3 days
0.96in

Visibility

How far you can see at Marathon, the next 43 hours

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

FriSat

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

What is measuring near here

The 5 instruments nearest Marathon, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 4.7 miles away.

measured now3 instruments

Storm LakeSLB

At an airfield/22.3 mi away/1,476 ft/83 ft above here

temp, wind, gust, visibility, precip, pressure

Rank330of 1,060

measured daily2 instruments

Sioux Rapids 4 ESXRI4

At a cooperative observer's station/4.7 mi away/1,378 ft/15 ft below here

snowfall, snow depth, precip, high, low

Rank-

Dickens 4.6 SSEIA-CY-10

In a volunteer observer's own ground/14.6 mi away/1,407 ft/14 ft above here

precip, snowfall, snow depth

Rank-

Station report

The weather at Storm Lake, drawn

The nearest airport reporting now, 22.3 mi from Marathon, Iowa. From its report of Oct 16, 2026, 12:35 AM local time: 3 of its 6 sheets.

The sky

Overcast at 3,600 ft; the ceiling is 3,600 ft; visibility 10 mi or more.

Section of the sky over Storm Lake, height above the station to scale: overcast cloud with its base at 3,600 feet, the ceiling at 3,600 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SLBFIG. A THE SKY OVER STORM LAKESECTION, 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 3,600 FTOVERCAST, 8 EIGHTHS OF THE SKYCEILING 3,600 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEStorm Lake, the skySTATION REPORT · ASOS SLBTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-SLB-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

44.6 F with a dew point of 37.4 F, 76 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,700 ft up; the lowest cloud reported is at 3,600 ft.

Chart of the air at Storm Lake: temperature 44.6 degrees Fahrenheit and dew point 37.4, 76 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,700 feet above the station, against the lowest cloud reported at 3,600 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SLBFIG. B THE AIR AT STORM LAKETHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,0005,00020 F30 F40 F50 F60 FSATURATES 1,700 FT ABOVE THE STATION, AT 35.8 FLOWEST CLOUD REPORTED, OVC 3,600 FTTEMPERATURE 44.6 FDEW POINT 37.4 FSPREAD 7.2 FRELATIVE HUMIDITY 76 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 POINTTITLEStorm Lake, the airSTATION REPORT · ASOS SLBTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-SLB-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the west northwest (300 degrees) at 18 mph, gusting 25 mph: force 4, a moderate breeze on the Beaufort scale. The strongest gust today was 25 mph.

Plan of the wind at Storm Lake, north up: blowing from 300 degrees, the west northwest, at 18 miles an hour, gusting 25; beside it the Beaufort scale from calm to hurricane force, force 4, moderate breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SLBFIG. C THE WIND AT STORM LAKEPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 300°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE13NOW, 18 MPH5FRESH BREEZE196STRONG BREEZE25GUST, 25 MPH7NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEStorm Lake, the windSTATION REPORT · ASOS SLBTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-SLB-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

0in

Snow on the ground

Measured at Sioux Rapids 4 E (SXRI4), 4.7 miles from here, read 12 Oct, 06:00. measured daily

Elsewhere in Iowa

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

Near Marathon

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

Near Marathon

River and lake gauges