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National City, California

City in San Diego County, California

Air quality

The air at National City

Index 50, good, led by fine particles. Read at 9 PM from its reporting area, San Diego Coast (CA), 12 miles off.

50Good
  • Fine particles (PM2.5)50Good3.8 mi
  • Ozone36Good6 ppb3.8 mi
  • Coarse particles (PM10)25Good3.8 mi

The days ahead

Good each day through Fri Oct 16, led by ozone. Yesterday measured 58, moderate.

Smoke, the next 44 hours

Little smoke near the ground through Sat 5 PM: the index from smoke stays at 28 or under.

FriSat

Precipitation

What has fallen at National City

None in the last 3 days, to Thu 9 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 National City, the next 44 hours

Visibility stays 10 miles or more through Sat 5 PM.

FriSat

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

What is measuring near here

The 5 instruments nearest National City, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 2.5 miles away.

measured now3 instruments

San Miguel RAWSMIGC1

A remote fire weather station/6.9 mi away/617 ft/560 ft above here

temp, wind, gust, humidity, pressure

Rank-

measured daily2 instruments

Chula VistaCVAC1

At a cooperative observer's station/2.5 mi away/75 ft/18 ft above here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at San Diego/Lindberg, drawn

The nearest airport reporting now, 6.8 mi from National City, California. From its report of Oct 15, 2026, 9:51 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 San Diego/Lindberg, 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 SANFIG. A THE SKY OVER SAN DIEGO/LINDBERGSECTION, 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 MORE0510TITLESan Diego/Lindberg, the skySTATION REPORT · ASOS SANTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-SAN-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

75.0 F with a dew point of 48.0 F, 38 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 6,200 ft up.

Chart of the air at San Diego/Lindberg: temperature 75.0 degrees Fahrenheit and dew point 48.0, 38 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 6,200 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SANFIG. B THE AIR AT SAN DIEGO/LINDBERGTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,0005,0006,0007,0008,00030 F40 F50 F60 F70 F80 F90 FSATURATES 6,200 FT ABOVE THE STATION, AT 42.1 FTEMPERATURE 75.0 FDEW POINT 48.0 FSPREAD 27.0 FRELATIVE HUMIDITY 38 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 POINTTITLESan Diego/Lindberg, the airSTATION REPORT · ASOS SANTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-SAN-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

Calm.

Plan of the wind at San Diego/Lindberg, north up: calm; beside it the Beaufort scale from calm to hurricane force, force 0, calm, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SANFIG. C THE WIND AT SAN DIEGO/LINDBERGPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONCALMBEAUFORT FORCELEAST WIND, MPH0CALM0NOW, 0 MPH1LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLESan Diego/Lindberg, the windSTATION REPORT · ASOS SANTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-SAN-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of San Diego/Lindberg, 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 National City

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

Near National City

River and lake gauges