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Portland, Iowa

Community in Cerro Gordo County, Iowa

Air quality

The air at Portland

Index 38, good, led by fine particles. Read at 1 AM from its reporting area, Waterloo (IA), 57 miles off.

38Good
  • Fine particles (PM2.5)38Good-

The days ahead

Good each day through Today, led by ozone. Yesterday measured 21, good.

Smoke, the next 43 hours

No smoke near the ground through Sat 7 PM.

FriSat

Precipitation

What has fallen at Portland

0.86 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
0.86in
Last 3 days
0.86in

Visibility

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

Visibility stays 7 miles or more through Sat 7 PM, lowest 8 miles Sat 3 AM.

FriSat

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

What is measuring near here

The 5 instruments nearest Portland, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.2 miles away.

measured now3 instruments

Mason CityMCW

At an airfield/10.3 mi away/1,214 ft/136 ft above here

temp, wind, gust, visibility, precip, pressure

Rank10of 1,060

measured daily2 instruments

Mason City 1.0 NEIA-CG-2

In a volunteer observer's own ground/4.0 mi away/1,109 ft/31 ft above here

precip, snowfall, snow depth

Rank-

Mason CityMCWI4

At a cooperative observer's station/4.3 mi away/1,096 ft/18 ft above here

snowfall, snow depth, precip, high, low

Rank259of 1,060

Station report

The weather at Mason City, drawn

The nearest airport reporting now, 10.3 mi from Portland, Iowa. From its report of Oct 16, 2026, 12:53 AM local time: 3 of its 6 sheets.

The sky

Broken at 1,900 ft, overcast at 2,400 ft; the ceiling is 1,900 ft; visibility 10 mi or more.

Section of the sky over Mason City, height above the station to scale: broken cloud with its base at 1,900 feet, overcast cloud with its base at 2,400 feet, the ceiling at 1,900 feet, and visibility of 10 mi or more.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 STATION05001,0001,5002,0002,5003,0003,5004,000ETAGESLOWTHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETOVC 2,400 FTOVERCAST, 8 EIGHTHS OF THE SKYBKN 1,900 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYCEILING 1,900 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEMason 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 41.0 F, 86 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 900 ft up; the lowest cloud reported is at 1,900 ft.

Chart of the air at Mason City: temperature 45.0 degrees Fahrenheit and dew point 41.0, 86 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 900 feet above the station, against the lowest cloud reported at 1,900 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 900 FT ABOVE THE STATION, AT 40.1 FLOWEST CLOUD REPORTED, BKN 1,900 FTTEMPERATURE 45.0 FDEW POINT 41.0 FSPREAD 4.0 FRELATIVE HUMIDITY 86 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 west northwest (290 degrees) at 16 mph, gusting 30 mph: force 4, a moderate breeze on the Beaufort scale. The strongest gust today was 32 mph.

Plan of the wind at Mason City, north up: blowing from 290 degrees, the west northwest, at 16 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 MCWFIG. C THE WIND AT MASON CITYPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 290°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE13NOW, 16 MPH5FRESH BREEZE196STRONG BREEZE25GUST, 30 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 Mason City (MCWI4), 4.3 miles from here, read 15 Oct, 07:00. measured daily

Elsewhere in Iowa

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

Near Portland

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

Near Portland

River and lake gauges