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Des Moines, Washington

City in King County, Washington

Air quality

The air at Des Moines

Index 54, moderate, led by fine particles. Read at 8 PM from its reporting area, Seattle-Bellevue-Kent Valley (WA), 12 miles off.

54Moderate
  • Fine particles (PM2.5)54Moderate-
  • Ozone4Good-
  • Coarse particles (PM10)13Good-

The days ahead

Good each day through Sat Oct 17, led by fine particles. Yesterday measured 32, good.

Smoke, the next 46 hours

Little smoke near the ground through Sat 5 PM: the index from smoke stays at 17 or under.

ThuFriSat

Precipitation

What has fallen at Des Moines

None in the last 3 days, to Thu 7 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.00in
Last 3 days
0.00in

Visibility

How far you can see at Des Moines, the next 46 hours

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

ThuFriSat

On the radar over Des Moines, WashingtonReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 6 instruments nearest Des Moines, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 2.4 miles away.

measured now4 instruments

measured daily2 instruments

Tacoma No. 1TACW1

At a cooperative observer's station/11.2 mi away/6 ft/174 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Seattle-Tacoma INTL, drawn

The nearest airport reporting now, 3.5 mi from Des Moines, Washington. From its report of Oct 15, 2026, 7:53 PM local time: 3 of its 6 sheets.

The sky

A few clouds at 25,000 ft; visibility 10 mi or more.

Section of the sky over Seattle-Tacoma INTL, height above the station to scale: a few clouds cloud with its base at 25,000 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SEAFIG. A THE SKY OVER SEATTLE-TACOMA INTLSECTION, 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 STATION05,00010,00015,00020,00025,00030,00035,00040,000ETAGESLOWMIDDLEHIGHTHE STATIONTHE CEILOMETER READS TO 12,000 FTFEW 25,000 FTA FEW CLOUDS, 1 TO 2 EIGHTHS OF THE SKYVISIBILITY, MILES: 10 MI OR MORE0510TITLESeattle-Tacoma INTL, the skySTATION REPORT · ASOS SEATYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-SEA-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-010, FB-SKY-011, FB-SKY-012

The air

58.0 F with a dew point of 50.0 F, 75 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,800 ft up; the lowest cloud reported is at 25,000 ft.

Chart of the air at Seattle-Tacoma INTL: temperature 58.0 degrees Fahrenheit and dew point 50.0, 75 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,800 feet above the station, against the lowest cloud reported at 25,000 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SEAFIG. B THE AIR AT SEATTLE-TACOMA INTLTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,0005,0006,0007,0008,00040 F50 F60 F70 FSATURATES 1,800 FT ABOVE THE STATION, AT 48.2 FABOVE THIS SHEET: LOWEST CLOUD REPORTED, FEW 25,000 FTTEMPERATURE 58.0 FDEW POINT 50.0 FSPREAD 8.0 FRELATIVE HUMIDITY 75 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 POINTTITLESeattle-Tacoma INTL, the airSTATION REPORT · ASOS SEATYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-SEA-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

Calm.

Plan of the wind at Seattle-Tacoma INTL, north up: calm; beside it the Beaufort scale from calm to hurricane force, force 0, calm, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SEAFIG. C THE WIND AT SEATTLE-TACOMA INTLPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONCALMBEAUFORT FORCELEAST WIND, MPH0CALM0NOW, 0 MPH1LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLESeattle-Tacoma INTL, the windSTATION REPORT · ASOS SEATYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-SEA-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Seattle-Tacoma INTL, in 6 sheets, each beside the Field Book plates that explain it

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Snow on the ground

Elsewhere in Washington

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

Near Des Moines

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

Near Des Moines

River and lake gauges