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San Fernando, California

City in Los Angeles County, California

Air quality

The air at San Fernando

Index 36, good, led by ozone. Read at 12 PM from its reporting area, W San Fernando Vly (CA), 8 miles off.

36Good
  • Fine particles (PM2.5)22Good8.2 mi
  • Ozone36Good41 ppb8.2 mi
  • Coarse particles (PM10)-13.9 mi
  • Nitrogen dioxide1Good1.7 ppb8.2 mi

The days ahead

Good each day through Sat Oct 17, led by ozone. Yesterday measured 41, good.

Smoke, the next 42 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 San Fernando

None in the last 3 days, to Fri 11 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 San Fernando, the next 42 hours

Visibility stays 10 miles or more through Sun 5 AM.

FriSatSun

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

What is measuring near here

The 5 instruments nearest San Fernando, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 2.5 miles away.

measured now3 instruments

measured daily2 instruments

Shadow Hills 2.1 NNECA-LA-156

In a volunteer observer's own ground/5.0 mi away/1,156 ft/55 ft above here

precip, snowfall, snow depth

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Station report

The weather at La / Whiteman, drawn

The nearest airport reporting now, 2.5 mi from San Fernando, California. From its report of Oct 16, 2026, 11:55 AM local time: 3 of its 6 sheets.

The sky

Clear; visibility 10 mi or more.

Section of the sky over La / Whiteman, height above the station to scale: a clear sky, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT WHPFIG. A THE SKY OVER LA / WHITEMANSECTION, 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 STATIONCLEARVISIBILITY, MILES: 10 MI OR MORE0510TITLELa / Whiteman, the skySTATION REPORT · ASOS WHPTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-WHP-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

87.8 F with a dew point of 33.8 F, 15 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 12,100 ft up.

Chart of the air at La / Whiteman: temperature 87.8 degrees Fahrenheit and dew point 33.8, 15 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 12,100 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT WHPFIG. B THE AIR AT LA / WHITEMANTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION02,0004,0006,0008,00010,00012,00014,00016,00010 F30 F50 F70 F90 FSATURATES 12,100 FT ABOVE THE STATION, AT 23.0 FTEMPERATURE 87.8 FDEW POINT 33.8 FSPREAD 54.0 FRELATIVE HUMIDITY 15 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 POINTTITLELa / Whiteman, the airSTATION REPORT · ASOS WHPTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-WHP-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the north (360 degrees) at 15 mph, gusting 29 mph: force 4, a moderate breeze on the Beaufort scale. The strongest gust today was 47 mph.

Plan of the wind at La / Whiteman, north up: blowing from 360 degrees, the north, at 15 miles an hour, gusting 29; beside it the Beaufort scale from calm to hurricane force, force 4, moderate breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT WHPFIG. C THE WIND AT LA / WHITEMANPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 360°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE13NOW, 15 MPH5FRESH BREEZE196STRONG BREEZE25GUST, 29 MPH7NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLELa / Whiteman, the windSTATION REPORT · ASOS WHPTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-WHP-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of La / Whiteman, 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 San Fernando

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

Near San Fernando

River and lake gauges