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Dayton, Washington

City in Columbia County, Washington

Air quality

The air at Dayton

Index 38, good, led by fine particles. Read at 1 AM from its reporting area, Dayton (WA), 0 miles off.

38Good
  • Fine particles (PM2.5)38Good0.3 mi
  • Ozone27Good-

The days ahead

Good each day through Today, led by fine particles. Yesterday measured 40, good.

Smoke, the next 41 hours

Smoke near the ground peaks at index 56, moderate, Fri 10 PM.

FriSat

Precipitation

What has fallen at Dayton

None in the last 3 days, to Fri 12 AM. 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 Dayton, the next 41 hours

Visibility stays 10 miles or more through Sat 5 PM.

FriSat

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

What is measuring near here

The 6 instruments nearest Dayton, 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 now4 instruments

measured daily2 instruments

Dayton 0.4 NNEWA-CB-5

In a volunteer observer's own ground/0.3 mi away/1,666 ft/52 ft above here

precip, snowfall, snow depth

Rank-

Dayton 1 WSWDYNW1

At a cooperative observer's station/1.2 mi away/1,552 ft/62 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Walla Walla Rgn, drawn

The nearest airport reporting now, 21.5 mi from Dayton, Washington. From its report of Oct 16, 2026, 12:53 AM local time: 3 of its 6 sheets.

The sky

No cloud below 12,000 ft; visibility 10 mi or more.

Section of the sky over Walla Walla Rgn, height above the station to scale: no cloud detected below 12,000 feet, the reach of its ceilometer, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT ALWFIG. A THE SKY OVER WALLA WALLA RGNSECTION, 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 SHEETNO CLOUD DETECTED BELOW 12,000 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEWalla Walla Rgn, the skySTATION REPORT · ASOS ALWTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-ALW-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

49.0 F with a dew point of 34.0 F, 56 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 3,400 ft up.

Chart of the air at Walla Walla Rgn: temperature 49.0 degrees Fahrenheit and dew point 34.0, 56 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 3,400 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT ALWFIG. B THE AIR AT WALLA WALLA RGNTHE 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 3,400 FT ABOVE THE STATION, AT 30.8 FTEMPERATURE 49.0 FDEW POINT 34.0 FSPREAD 15.0 FRELATIVE HUMIDITY 56 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 POINTTITLEWalla Walla Rgn, the airSTATION REPORT · ASOS ALWTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-ALW-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the southeast (130 degrees) at 5 mph: force 2, a light breeze on the Beaufort scale.

Plan of the wind at Walla Walla Rgn, north up: blowing from 130 degrees, the southeast, at 5 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 2, light breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT ALWFIG. C THE WIND AT WALLA WALLA RGNPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 130°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE4NOW, 5 MPH3GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEWalla Walla Rgn, the windSTATION REPORT · ASOS ALWTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-ALW-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

0in

Snow on the ground

Measured at Dayton 1 WSW (DYNW1), 1.2 miles from here, read 13 Oct, 11:00. measured daily

Elsewhere in Washington

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

Near Dayton

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

Near Dayton

River and lake gauges