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Fallbrook, California

Community in San Diego County, California

Air quality

The air at Fallbrook

Index 37, good, led by ozone. Read at 9 PM from its reporting area, Temecula Vly (CA), 10 miles off.

37Good
  • Fine particles (PM2.5)22Good13.9 mi
  • Ozone37Good37 ppb13.9 mi
  • Coarse particles (PM10)13Good13.9 mi
  • Nitrogen dioxide4Good4.7 ppb21.8 mi

The days ahead

Good each day through Fri Oct 16, led by ozone. Yesterday measured 46, good.

Smoke, the next 44 hours

Smoke near the ground peaks at index 77, moderate, Sat 5 PM.

FriSat

Precipitation

What has fallen at Fallbrook

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 Fallbrook, the next 44 hours

Visibility stays 10 miles or more through Sat 5 PM.

FriSat

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

What is measuring near here

The 6 instruments nearest Fallbrook, 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

measured daily2 instruments

Fallbrook 1.8 NNWCA-SD-250

In a volunteer observer's own ground/1.4 mi away/715 ft/32 ft below here

precip, snowfall, snow depth

Rank-

Vista 2 NNEVSTC1

At a cooperative observer's station/10.0 mi away/531 ft/216 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Fallbrook, drawn

The nearest airport reporting now, 1.4 mi from Fallbrook, California. From its report of Oct 15, 2026, 9:35 PM local time: 3 of its 6 sheets.

The sky

No cloud below 12,000 ft; visibility 10 mi or more.

Section of the sky over Fallbrook, height above the station to scale: no cloud detected below 12,000 feet, the reach of its ceilometer, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT L18FIG. A THE SKY OVER FALLBROOKSECTION, 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 STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETNO CLOUD DETECTED BELOW 12,000 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEFallbrook, the skySTATION REPORT · ASOS L18TYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-L18-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

77.0 F with a dew point of 37.4 F, 24 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 9,000 ft up.

Chart of the air at Fallbrook: temperature 77.0 degrees Fahrenheit and dew point 37.4, 24 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 9,000 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT L18FIG. B THE AIR AT FALLBROOKTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION02,0004,0006,0008,00010,00012,00020 F40 F60 F80 FSATURATES 9,000 FT ABOVE THE STATION, AT 29.2 FTEMPERATURE 77.0 FDEW POINT 37.4 FSPREAD 39.6 FRELATIVE HUMIDITY 24 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, the airSTATION REPORT · ASOS L18TYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-L18-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the east northeast (70 degrees) at 8 mph: force 3, a gentle breeze on the Beaufort scale. The strongest gust today was 20 mph.

Plan of the wind at Fallbrook, north up: blowing from 70 degrees, the east northeast, at 8 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 3, gentle breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT L18FIG. C THE WIND AT FALLBROOKPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 70°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE8NOW, 8 MPH4MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEFallbrook, the windSTATION REPORT · ASOS L18TYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-L18-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Fallbrook, 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 Fallbrook

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

Near Fallbrook

River and lake gauges