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Antioch, California

City in Contra Costa County, California

Air quality

The air at Antioch

Index 49, good, led by fine particles. Read at 12 AM from its reporting area, Concord (CA), 13 miles off.

49Good
  • Fine particles (PM2.5)49Good-
  • Ozone23Good-

The days ahead

Highest moderate, Sat Oct 17, led by ozone. Yesterday measured 39, good.

Smoke, the next 41 hours

Little smoke near the ground through Sat 5 PM: the index from smoke stays at 11 or under.

FriSat

Precipitation

What has fallen at Antioch

None in the last 3 days, to Thu 11 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 Antioch, the next 41 hours

Visibility stays 10 miles or more through Sat 5 PM.

FriSat

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

What is measuring near here

The 6 instruments nearest Antioch, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.8 miles away.

measured now4 instruments

measured daily2 instruments

Antioch 0.9 SSWCA-CC-32

In a volunteer observer's own ground/0.8 mi away/206 ft/96 ft above here

precip, snowfall, snow depth

Rank-

Diablo - Mount DiabloMDJC1

At a cooperative observer's station/10.3 mi away/3,102 ft/2,992 ft above here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Citizen station K6BIV, drawn

The nearest instrument reporting now, 3.9 mi from Antioch, California. From its report of undefined: 3 of its 4 sheets.

The wind

Calm.

Plan of the wind at Citizen station K6BIV, 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 K6BIVFIG. C THE WIND AT CITIZEN STATION K6BIVPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONCALMBEAUFORT FORCELEAST WIND, MPH0CALM0NOW, 0 MPH1LIGHT AIR1GUST, 1 MPH2LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLECitizen station K6BIV, the windSTATION REPORT · CWOP K6BIVTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 1 of 4DATE2026-10-16IDSR-K6BIV-1DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008

The column

At 16 ft above sea level, 0 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 29.90 inHg and the temperature at 58.9 F; the station's altimeter setting of 30.08 inHg means its barometer reads 30.06 inHg; it reports 62.0 F, 3.1 F warmer than standard.

Section from sea level of where Citizen station K6BIV stands in the atmosphere, height to scale: the station 16 feet above sea level with 0 per cent of the air below it; the standard atmosphere's pressure there, 29.90 inches of mercury, and temperature, 58.9 degrees Fahrenheit; the altimeter setting of 30.08 and the station pressure it means, 30.06.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT K6BIVFIG. D WHERE CITIZEN STATION K6BIV 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 K6BIV0 PER CENT OF THE AIR BELOW IT16 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 HERE29.90 inHgSTANDARD TEMPERATURE HERE58.9 FALTIMETER SETTING, REPORTED30.08 inHgITS BAROMETER READS30.06 inHgTEMPERATURE, REPORTED62.0 FTITLECitizen station K6BIV, the columnSTATION REPORT · CWOP K6BIVTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 4DATE2026-10-16IDSR-K6BIV-2DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

The sun

On Oct 16 the noon sun stands 43 degrees above the horizon at 38.02 N, and the day is 11 h 02 min long. Level ground there takes 68 per cent of the noon sunlight a surface facing the sun would.

Elevation of the noon sun at Citizen station K6BIV, angles true: on Oct 16 it stands 43 degrees above the horizon, against 75 at the June solstice, 52 at the equinoxes and 29 at the December solstice; the day is 11 h 02 min long.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT K6BIVFIG. E THE SUN AT CITIZEN STATION K6BIVELEVATION 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 75°EQUINOXES 52°DECEMBER SOLSTICE 29°OCT 16, 43°SOUTHANGLES TRUE; THE RAYS ARE OF ONE LENGTH AND DRAW DIRECTION ONLYDAY LENGTH 11 H 02 MINLEVEL GROUND TAKES 68 PER CENT OF THE NOON SUN A FACING SURFACE WOULDLATITUDE 38.02 N; THE SUN'S DECLINATION -9.1°TITLECitizen station K6BIV, the sunSTATION REPORT · CWOP K6BIVTYPEELEVATIONSCALEANGLES TRUEREVAS REPORTED SHEET 3 of 4DATE2026-10-16IDSR-K6BIV-3DRAWN AS linework on paperSOURCES FB-ENG-007

The full report of Citizen station K6BIV, 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 Antioch

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

Near Antioch

River and lake gauges