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Arcadia, California

City in Los Angeles County, California

Air quality

The air at Arcadia

Index 31, good, led by ozone. Read at 9 PM from its reporting area, W San Gabriel Vly (CA), 5 miles off.

31Good
  • Fine particles (PM2.5)-10.9 mi
  • Ozone31Good25 ppb5 mi
  • Coarse particles (PM10)-10.9 mi
  • Nitrogen dioxide12Good13.6 ppb5 mi
  • Sulfur dioxide0Good0.4 ppb11.6 mi
  • Carbon monoxide-0.9 ppm11.6 mi

The days ahead

Good each day through Fri Oct 16, led by nitrogen dioxide. Yesterday measured 45, good.

Smoke, the next 44 hours

Little smoke near the ground through Sat 5 PM: the index from smoke stays at 17 or under.

FriSat

Precipitation

What has fallen at Arcadia

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 Arcadia, the next 44 hours

Visibility stays 10 miles or more through Sat 5 PM.

FriSat

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

What is measuring near here

The 6 instruments nearest Arcadia, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.1 miles away.

measured now4 instruments

El MonteEMT

At an airfield/3.1 mi away/295 ft/152 ft below here

temp, wind, gust, visibility, precip, pressure

Rank4,211of 4,465

Sierra Madre 2N - Eaton FireRWPC1

At a river or reservoir gauge/4.6 mi away/4,019 ft/3,572 ft above here

temp, wind, gust, humidity, pressure

Rank-

measured daily2 instruments

Pasadena - San Gabriel FireJBLC1

At a cooperative observer's station/3.6 mi away/468 ft/21 ft above here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Citizen station DW7923, drawn

The nearest instrument reporting now, 4.7 mi from Arcadia, California. From its report of undefined: 3 of its 4 sheets.

The wind

Calm.

Plan of the wind at Citizen station DW7923, 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 DW7923FIG. C THE WIND AT CITIZEN STATION DW7923PLAN, 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 FORCE73TITLECitizen station DW7923, the windSTATION REPORT · CWOP DW7923TYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 1 of 4DATE2026-10-16IDSR-DW7923-1DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008

The column

At 356 ft above sea level, 1 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 29.54 inHg and the temperature at 57.7 F; the station's altimeter setting of 29.99 inHg means its barometer reads 29.61 inHg; it reports 76.0 F, 18.3 F warmer than standard.

Section from sea level of where Citizen station DW7923 stands in the atmosphere, height to scale: the station 356 feet above sea level with 1 per cent of the air below it; the standard atmosphere's pressure there, 29.54 inches of mercury, and temperature, 57.7 degrees Fahrenheit; the altimeter setting of 29.99 and the station pressure it means, 29.61.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT DW7923FIG. D WHERE CITIZEN STATION DW7923 STANDS IN THE ATMOSPHERESECTION FROM SEA LEVEL, HEIGHT TO SCALE, THE STATION IN THE STANDARD ATMOSPHEREFT ABOVE SEA LEVEL05,00010,00015,000SEA LEVEL, 29.92 inHg IN THE STANDARD ATMOSPHERECITIZEN STATION DW79231 PER CENT OF THE AIR BELOW IT356 FT10 PER CENT OF THE AIR BELOW, 2,890 FT20 PER CENT OF THE AIR BELOW, 6,050 FT30 PER CENT OF THE AIR BELOW, 9,540 FT40 PER CENT OF THE AIR BELOW, 13,470 FTSTANDARD PRESSURE HERE29.54 inHgSTANDARD TEMPERATURE HERE57.7 FALTIMETER SETTING, REPORTED29.99 inHgITS BAROMETER READS29.61 inHgTEMPERATURE, REPORTED76.0 FTITLECitizen station DW7923, the columnSTATION REPORT · CWOP DW7923TYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 4DATE2026-10-16IDSR-DW7923-2DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

The sun

On Oct 16 the noon sun stands 47 degrees above the horizon at 34.08 N, and the day is 11 h 10 min long. Level ground there takes 73 per cent of the noon sunlight a surface facing the sun would.

Elevation of the noon sun at Citizen station DW7923, angles true: on Oct 16 it stands 47 degrees above the horizon, against 79 at the June solstice, 56 at the equinoxes and 32 at the December solstice; the day is 11 h 10 min long.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT DW7923FIG. E THE SUN AT CITIZEN STATION DW7923ELEVATION LOOKING WEST, SOUTH TO THE LEFT: THE NOON SUN ON THE DAY OF THE REPORT, AND AT THE SOLSTICES AND EQUINOXES; ANGLES TRUETHE STATIONJUNE SOLSTICE 79°EQUINOXES 56°DECEMBER SOLSTICE 32°OCT 16, 47°SOUTHANGLES TRUE; THE RAYS ARE OF ONE LENGTH AND DRAW DIRECTION ONLYDAY LENGTH 11 H 10 MINLEVEL GROUND TAKES 73 PER CENT OF THE NOON SUN A FACING SURFACE WOULDLATITUDE 34.08 N; THE SUN'S DECLINATION -9.1°TITLECitizen station DW7923, the sunSTATION REPORT · CWOP DW7923TYPEELEVATIONSCALEANGLES TRUEREVAS REPORTED SHEET 3 of 4DATE2026-10-16IDSR-DW7923-3DRAWN AS linework on paperSOURCES FB-ENG-007

The full report of Citizen station DW7923, in 4 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 Arcadia

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

Near Arcadia

River and lake gauges