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Clay, California

Community in Sacramento County, California

Air quality

The air at Clay

Index 43, good, led by ozone. Read at 11 AM from its reporting area, Sloughhouse (CA), 12 miles off.

43Good
  • Fine particles (PM2.5)36Good12.4 mi
  • Ozone43Good53 ppb12.4 mi
  • Coarse particles (PM10)-14.2 mi
  • Nitrogen dioxide4Good4 ppb14.2 mi

The days ahead

Highest 67, moderate, Sat Oct 17, led by ozone. Yesterday measured 80, moderate.

Smoke, the next 43 hours

Little smoke near the ground through Sun 5 AM: the index from smoke stays at 6 or under.

FriSatSun

Precipitation

What has fallen at Clay

None in the last 3 days, to Fri 10 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 Clay, the next 43 hours

Visibility stays 10 miles or more through Sun 5 AM.

FriSatSun

On the radar over Clay, CaliforniaReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 6 instruments nearest Clay, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 7.2 miles away.

measured now4 instruments

measured daily2 instruments

Acampo 5NEACPC1

At a cooperative observer's station/7.2 mi away/83 ft/69 ft below here

snowfall, snow depth, precip, high, low

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Station report

The weather at Mather Field, drawn

The nearest airport reporting now, 18.2 mi from Clay, California. From its report of Oct 16, 2026, 11:15 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 Mather Field, 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 MHRFIG. A THE SKY OVER MATHER FIELDSECTION, 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 MORE0510TITLEMather Field, the skySTATION REPORT · ASOS MHRTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-MHR-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

75.0 F with a dew point of 40.5 F, 29 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 7,800 ft up.

Chart of the air at Mather Field: temperature 75.0 degrees Fahrenheit and dew point 40.5, 29 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 7,800 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MHRFIG. B THE AIR AT MATHER FIELDTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION02,0004,0006,0008,00010,00020 F40 F60 F80 FSATURATES 7,800 FT ABOVE THE STATION, AT 33.2 FTEMPERATURE 75.0 FDEW POINT 40.5 FSPREAD 34.5 FRELATIVE HUMIDITY 29 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 POINTTITLEMather Field, the airSTATION REPORT · ASOS MHRTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-MHR-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the south (170 degrees) at 9 mph: force 3, a gentle breeze on the Beaufort scale.

Plan of the wind at Mather Field, north up: blowing from 170 degrees, the south, at 9 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 3, gentle breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MHRFIG. C THE WIND AT MATHER FIELDPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 170°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE8NOW, 9 MPH4MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEMather Field, the windSTATION REPORT · ASOS MHRTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-MHR-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

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Snow on the ground

Elsewhere in California

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

Near Clay

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

Near Clay

River and lake gauges