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Clayton, Idaho

City in Custer County, Idaho

Air quality

The air at Clayton

Index 15, good, led by fine particles. Read at 12 AM from its reporting area, Ketchum (ID), 40 miles off.

15Good
  • Fine particles (PM2.5)15Good-

The days ahead

Good each day through Mon Oct 19, led by fine particles. Yesterday measured 0, good.

Smoke, the next 42 hours

No smoke near the ground through Sat 6 PM.

FriSat

Precipitation

What has fallen at Clayton

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 Clayton, the next 42 hours

Visibility stays 10 miles or more through Sat 6 PM.

FriSat

On the radar over Clayton, IdahoReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 6 instruments nearest Clayton, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 4.0 miles away.

measured now4 instruments

D4 - ClaytonITD30

Beside a road/4.0 mi away/5,561 ft/122 ft above here

temp, pavement temp, wind, visibility, precip

Rank697of 833

ChallisLLJ

At an airfield/20.4 mi away/5,072 ft/367 ft below here

temp, wind, gust, visibility, precip, pressure

Rank120of 833

measured daily2 instruments

Challis AirportKLLJ

At an airfield/20.4 mi away/5,033 ft/406 ft below here

snowfall, snow depth, precip, high, low

Rank-

Ketchum 0.5 SSEID-BN-1

In a volunteer observer's own ground/39.9 mi away/5,803 ft/364 ft above here

precip, snowfall, snow depth

Rank-

Station report

The weather at Challis, drawn

The nearest airport reporting now, 20.4 mi from Clayton, Idaho. From its report of Oct 16, 2026, 12:55 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 Challis, 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 LLJFIG. A THE SKY OVER CHALLISSECTION, 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 MORE0510TITLEChallis, the skySTATION REPORT · ASOS LLJTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-LLJ-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

38.0 F with a dew point of 30.0 F, 73 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,800 ft up.

Chart of the air at Challis: temperature 38.0 degrees Fahrenheit and dew point 30.0, 73 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; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT LLJFIG. B THE AIR AT CHALLISTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00020 F30 F40 F50 FSATURATES 1,800 FT ABOVE THE STATION, AT 28.3 FTEMPERATURE 38.0 FDEW POINT 30.0 FSPREAD 8.0 FRELATIVE HUMIDITY 73 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 POINTTITLEChallis, the airSTATION REPORT · ASOS LLJTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-LLJ-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

Calm.

Plan of the wind at Challis, 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 LLJFIG. C THE WIND AT CHALLISPLAN, 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 FORCE73TITLEChallis, the windSTATION REPORT · ASOS LLJTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-LLJ-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

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Snow on the ground

Elsewhere in Idaho

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

Near Clayton

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

Near Clayton

River and lake gauges