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San Clemente, California

City in Orange County, California

Air quality

The air at San Clemente

Index 39, good, led by ozone. Read at 8 PM from its reporting area, Saddleback Vly (CA), 14 miles off.

39Good
  • Fine particles (PM2.5)11Good19.7 mi
  • Ozone39Good38 ppb19.7 mi
  • Coarse particles (PM10)14Good19.7 mi

The days ahead

Highest 65, moderate, Fri Oct 16, led by ozone. Yesterday measured 50, good.

Smoke, the next 46 hours

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

ThuFriSat

Precipitation

What has fallen at San Clemente

None in the last 3 days, to Thu 7 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 San Clemente, the next 46 hours

Visibility stays 10 miles or more through Sat 5 PM.

ThuFriSat

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

What is measuring near here

The 6 instruments nearest San Clemente, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.0 miles away.

measured now4 instruments

Camp PendletonNXF

At an airfield/14.0 mi away/89 ft/110 ft below here

temp, wind, gust, visibility, precip, pressure

Rank-

measured daily2 instruments

San Clemente 1.6 SSWCA-OR-76

In a volunteer observer's own ground/1.0 mi away/112 ft/87 ft below here

precip, snowfall, snow depth

Rank-

Oceanside MarinaL34

At a harbour/20.3 mi away/23 ft/176 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Fallbrook - Mateo Ridge, drawn

The nearest instrument reporting now, 5.4 mi from San Clemente, California. From its report of Oct 15, 2026, 7:22 PM local time: 3 of its 5 sheets.

The air

83.0 F with a dew point of 33.7 F, 17 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 11,100 ft up.

Chart of the air at Fallbrook - Mateo Ridge: temperature 83.0 degrees Fahrenheit and dew point 33.7, 17 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 11,100 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT TEOC1FIG. B THE AIR AT FALLBROOK - MATEO RIDGETHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION02,0004,0006,0008,00010,00012,00014,00010 F30 F50 F70 F90 FSATURATES 11,100 FT ABOVE THE STATION, AT 23.8 FTEMPERATURE 83.0 FDEW POINT 33.7 FSPREAD 49.3 FRELATIVE HUMIDITY 17 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 POINTTITLEFallbrook - Mateo Ridge, the airSTATION REPORT · DCP TEOC1TYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 5DATE2026-10-16IDSR-TEOC1-1DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the north (359 degrees) at 7 mph, gusting 23 mph: force 2, a light breeze on the Beaufort scale. The strongest gust today was 32 mph.

Plan of the wind at Fallbrook - Mateo Ridge, north up: blowing from 359 degrees, the north, at 7 miles an hour, gusting 23; beside it the Beaufort scale from calm to hurricane force, force 2, light breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT TEOC1FIG. C THE WIND AT FALLBROOK - MATEO RIDGEPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 359°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE4NOW, 7 MPH3GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE19GUST, 23 MPH6STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEFallbrook - Mateo Ridge, the windSTATION REPORT · DCP TEOC1TYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 2 of 5DATE2026-10-16IDSR-TEOC1-2DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008

The column

At 790 ft above sea level, 3 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 29.08 inHg and the temperature at 56.2 F; it reports 83.0 F, 26.8 F warmer than standard.

Section from sea level of where Fallbrook - Mateo Ridge stands in the atmosphere, height to scale: the station 790 feet above sea level with 3 per cent of the air below it; the standard atmosphere's pressure there, 29.08 inches of mercury, and temperature, 56.2 degrees Fahrenheit.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT TEOC1FIG. D WHERE FALLBROOK - MATEO RIDGE 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 ATMOSPHEREFALLBROOK - MATEO RIDGE3 PER CENT OF THE AIR BELOW IT790 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 HERE29.08 inHgSTANDARD TEMPERATURE HERE56.2 FTEMPERATURE, REPORTED83.0 FTITLEFallbrook - Mateo Ridge, the columnSTATION REPORT · DCP TEOC1TYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 3 of 5DATE2026-10-16IDSR-TEOC1-3DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

The full report of Fallbrook - Mateo Ridge, in 5 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 Clemente

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

Near San Clemente

River and lake gauges