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Lake Nacimiento, California

Community in San Luis Obispo County, California

Air quality

The air at Lake Nacimiento

Index 52, moderate, led by coarse particles. Read at 11 AM from its reporting area, Paso Robles (CA), 14 miles off.

52Moderate
  • Fine particles (PM2.5)-20.2 mi
  • Ozone24Good39 ppb20.2 mi
  • Coarse particles (PM10)52Moderate20.2 mi
  • Nitrogen dioxide3Good3.2 ppb20.2 mi

The days ahead

Highest moderate, today, led by ozone. Yesterday measured 48, good.

Smoke, the next 43 hours

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

FriSatSun

Precipitation

What has fallen at Lake Nacimiento

None in the last 3 days, to Fri 10 AM. 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 Lake Nacimiento, the next 43 hours

Visibility stays 10 miles or more through Sun 5 AM.

FriSatSun

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

What is measuring near here

The 5 instruments nearest Lake Nacimiento, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 5.5 miles away.

measured now3 instruments

Las TablasTABC1

At a river or reservoir gauge/5.5 mi away/925 ft/189 ft below here

temp, wind, gust, humidity, pressure

Rank940of 4,465

measured daily2 instruments

Paso RoblesPRBC1

At a cooperative observer's station/12.8 mi away/696 ft/418 ft below here

snowfall, snow depth, precip, high, low

Rank-

Templeton 3.5 WCA-SL-43

In a volunteer observer's own ground/12.9 mi away/908 ft/206 ft below here

precip, snowfall, snow depth

Rank-

Station report

The weather at Paso Robles, drawn

The nearest airport reporting now, 14.5 mi from Lake Nacimiento, California. From its report of Oct 16, 2026, 10:53 AM 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 Paso Robles, 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 PRBFIG. A THE SKY OVER PASO ROBLESSECTION, 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 MORE0510TITLEPaso Robles, the skySTATION REPORT · ASOS PRBTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-PRB-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

70.0 F with a dew point of 34.0 F, 26 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 8,100 ft up.

Chart of the air at Paso Robles: temperature 70.0 degrees Fahrenheit and dew point 34.0, 26 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 8,100 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT PRBFIG. B THE AIR AT PASO ROBLESTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION02,0004,0006,0008,00010,00020 F30 F40 F50 F60 F70 F80 FSATURATES 8,100 FT ABOVE THE STATION, AT 26.6 FTEMPERATURE 70.0 FDEW POINT 34.0 FSPREAD 36.0 FRELATIVE HUMIDITY 26 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 POINTTITLEPaso Robles, the airSTATION REPORT · ASOS PRBTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-PRB-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the west northwest (290 degrees) at 5 mph: force 2, a light breeze on the Beaufort scale.

Plan of the wind at Paso Robles, north up: blowing from 290 degrees, the west northwest, 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 PRBFIG. C THE WIND AT PASO ROBLESPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 290°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE4NOW, 5 MPH3GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEPaso Robles, the windSTATION REPORT · ASOS PRBTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-PRB-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Paso Robles, 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 Lake Nacimiento

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

Near Lake Nacimiento

River and lake gauges