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St. John, Washington

Town in Whitman County, Washington

Air quality

The air at St. John

Index 34, good, led by fine particles. Read at 8 PM from its reporting area, Rosalia (WA), 14 miles off.

34Good
  • Fine particles (PM2.5)34Good-

The days ahead

Good each day through Fri Oct 16, led by fine particles. Yesterday measured 29, good.

Smoke, the next 45 hours

Little smoke near the ground through Sat 5 PM: the index from smoke stays at 39 or under.

FriSat

Precipitation

What has fallen at St. John

None in the last 3 days, to Thu 8 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 St. John, the next 45 hours

Visibility stays 10 miles or more through Sat 5 PM.

FriSat

On the radar over St. John, WashingtonReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 8 instruments nearest St. John, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.1 miles away.

measured now6 instruments

measured daily2 instruments

RosaliaRSLW1

At a cooperative observer's station/14.3 mi away/2,411 ft/442 ft above here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Pullman/Moscow Rgnl, drawn

The nearest airport reporting now, 32.7 mi from St. John, Washington. From its report of Oct 15, 2026, 7:53 PM local time: 3 of its 6 sheets.

The sky

No cloud below 12,000 ft; visibility 8 mi.

Section of the sky over Pullman/Moscow Rgnl, height above the station to scale: no cloud detected below 12,000 feet, the reach of its ceilometer, and visibility of 8 mi.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT PUWFIG. A THE SKY OVER PULLMAN/MOSCOW RGNLSECTION, 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: 8 MI0510TITLEPullman/Moscow Rgnl, the skySTATION REPORT · ASOS PUWTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-PUW-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

47.0 F with a dew point of 31.0 F, 54 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 3,600 ft up.

Chart of the air at Pullman/Moscow Rgnl: temperature 47.0 degrees Fahrenheit and dew point 31.0, 54 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 3,600 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT PUWFIG. B THE AIR AT PULLMAN/MOSCOW RGNLTHE 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 3,600 FT ABOVE THE STATION, AT 27.6 FTEMPERATURE 47.0 FDEW POINT 31.0 FSPREAD 16.0 FRELATIVE HUMIDITY 54 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 POINTTITLEPullman/Moscow Rgnl, the airSTATION REPORT · ASOS PUWTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-PUW-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

Calm.

Plan of the wind at Pullman/Moscow Rgnl, 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 PUWFIG. C THE WIND AT PULLMAN/MOSCOW RGNLPLAN, 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 FORCE73TITLEPullman/Moscow Rgnl, the windSTATION REPORT · ASOS PUWTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-PUW-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Pullman/Moscow Rgnl, 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 St. John

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

Near St. John

River and lake gauges