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Bonsall, California

Community in San Diego County, California

Air quality

The air at Bonsall

Index 37, good, led by ozone. Read at 10 PM from its reporting area, Temecula Vly (CA), 14 miles off.

37Good
  • Fine particles (PM2.5)23Good12.4 mi
  • Ozone37Good34 ppb12.4 mi
  • Coarse particles (PM10)31Good12.4 mi

The days ahead

Good each day through Sat Oct 17, led by ozone. Yesterday measured 43, good.

Smoke, the next 43 hours

Smoke near the ground peaks at index 358, hazardous, Sat 7 PM.

SatSun

Precipitation

What has fallen at Bonsall

None in the last 3 days, to Fri 10 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 Bonsall, the next 43 hours

Mist or haze: visibility falls to 1 miles Sat 7 PM.

SatSun

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

What is measuring near here

The 6 instruments nearest Bonsall, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 2.9 miles away.

measured now4 instruments

PalaPZAC1

At a river or reservoir gauge/7.4 mi away/410 ft/184 ft above here

temp, wind, gust, humidity, pressure

Rank1,766of 4,461

measured daily2 instruments

Fallbrook 3.1 SSECA-SD-83

In a volunteer observer's own ground/2.9 mi away/609 ft/383 ft above here

precip, snowfall, snow depth

Rank-

Vista 2 NNEVSTC1

At a cooperative observer's station/4.4 mi away/531 ft/305 ft above here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Fallbrook, drawn

The nearest airport reporting now, 5.4 mi from Bonsall, California. From its report of Oct 16, 2026, 11:15 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 6DATE2026-10-17IDSR-L18-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

82.4 F with a dew point of 41.0 F, 23 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 9,400 ft up.

Chart of the air at Fallbrook: temperature 82.4 degrees Fahrenheit and dew point 41.0, 23 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 9,400 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 9,400 FT ABOVE THE STATION, AT 32.4 FTEMPERATURE 82.4 FDEW POINT 41.0 FSPREAD 41.4 FRELATIVE HUMIDITY 23 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 6DATE2026-10-17IDSR-L18-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the northeast (40 degrees) at 5 mph: force 2, a light breeze on the Beaufort scale. The strongest gust today was 37 mph.

Plan of the wind at Fallbrook, north up: blowing from 40 degrees, the northeast, at 5 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 2, light 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 40°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE4NOW, 5 MPH3GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEFallbrook, the windSTATION REPORT · ASOS L18TYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-17IDSR-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 Bonsall

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

Near Bonsall

River and lake gauges