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Dillon Beach, California

Community in Marin County, California

Air quality

The air at Dillon Beach

Index 37, good, led by fine particles. Read at 12 AM from its reporting area, Santa Rosa (CA), 19 miles off.

37Good
  • Fine particles (PM2.5)37Good-
  • Ozone10Good-

The days ahead

Good each day through Tue Oct 20, 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 Dillon Beach

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 Dillon Beach, the next 41 hours

Dense fog: visibility falls to 0 miles Sat 2 AM, under a mile for 6 hours.

FriSat

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

What is measuring near here

The 6 instruments nearest Dillon Beach, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.3 miles away.

measured now4 instruments

Bodega 6 WSW93245

At a climate reference station/7.3 mi away/63 ft/297 ft below here

temp, humidity, wind, solar, precip

Rank-

measured daily2 instruments

Tomales 1.3 ENECA-MR-11

In a volunteer observer's own ground/4.4 mi away/128 ft/232 ft below here

precip, snowfall, snow depth

Rank-

GratonGRNC1

At a cooperative observer's station/13.2 mi away/203 ft/157 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Dillon Beach, drawn

The nearest instrument reporting now, 0.3 mi from Dillon Beach, California. From its report of Oct 16, 2026, 12:01 AM local time: 3 of its 3 sheets.

The column

At 420 ft above sea level, 2 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 29.47 inHg and the temperature at 57.5 F; it reports 69.7 F, 12.2 F warmer than standard.

Section from sea level of where Dillon Beach stands in the atmosphere, height to scale: the station 420 feet above sea level with 2 per cent of the air below it; the standard atmosphere's pressure there, 29.47 inches of mercury, and temperature, 57.5 degrees Fahrenheit.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT DBEC1FIG. D WHERE DILLON BEACH 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 ATMOSPHEREDILLON BEACH2 PER CENT OF THE AIR BELOW IT420 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 HERE29.47 inHgSTANDARD TEMPERATURE HERE57.5 FTEMPERATURE, REPORTED69.7 FTITLEDillon Beach, the columnSTATION REPORT · DCP DBEC1TYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 3DATE2026-10-16IDSR-DBEC1-1DRAWN 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 38.26 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 Dillon Beach, angles true: on Oct 16 it stands 43 degrees above the horizon, against 75 at the June solstice, 52 at the equinoxes and 28 at the December solstice; the day is 11 h 02 min long.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT DBEC1FIG. E THE SUN AT DILLON BEACHELEVATION 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 28°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 38.26 N; THE SUN'S DECLINATION -9.1°TITLEDillon Beach, the sunSTATION REPORT · DCP DBEC1TYPEELEVATIONSCALEANGLES TRUEREVAS REPORTED SHEET 2 of 3DATE2026-10-16IDSR-DBEC1-2DRAWN AS linework on paperSOURCES FB-ENG-007

The instrument

A data collection platform, 420 ft above sea level. Its report of Oct 16, 2026, 12:01 AM local time is written on the sensors that made it.

Elevation of a data collection platform, Dillon Beach, each sensor drawn and labelled with what it read: antenna, sending by satellite, last heard oct 16, 2026, 12:01 am local time; air temperature, 69.7 f; precipitation gauge, 0.00 in today.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT DBEC1FIG. F THE INSTRUMENTELEVATION OF A DATA COLLECTION PLATFORM, EACH SENSOR WITH WHAT IT READ, OCT 16, 2026, 12:01 AM LOCAL TIMEANTENNA, SENDING BY SATELLITELAST HEARD OCT 16, 2026, 12:01 AM LOCAL TIMEAIR TEMPERATURE69.7 FPRECIPITATION GAUGE0.00 IN TODAYSCHEMATIC; THE SPACING BETWEEN SENSORS IS NOT TO SCALETITLEDillon Beach, the instrumentSTATION REPORT · DCP DBEC1TYPEELEVATIONSCALESCHEMATICREVAS REPORTED SHEET 3 of 3DATE2026-10-16IDSR-DBEC1-3DRAWN AS linework on paperSOURCES FB-INS-001

The full report of Dillon Beach, in 3 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 Dillon Beach

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

Near Dillon Beach

River and lake gauges