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San Bernardino, California

City in San Bernardino County, California

Air quality

The air at San Bernardino

Index 58, moderate, led by coarse particles. Read at 8 AM from its reporting area, C San Bernardino (CA), 4 miles off.

58Moderate
  • Fine particles (PM2.5)46Good8 mi
  • Ozone37Good33 ppb2.2 mi
  • Coarse particles (PM10)58Moderate2.2 mi
  • Nitrogen dioxide3Good3.6 ppb2.2 mi
  • Sulfur dioxide0Good0.1 ppb11.2 mi
  • Carbon monoxide-0.1 ppm11.2 mi

The days ahead

Good each day through Today, led by ozone. Yesterday measured 43, good.

Smoke, the next 46 hours

Little smoke near the ground through Sun 5 AM: the index from smoke stays at 6 or under.

FriSatSun

Precipitation

What has fallen at San Bernardino

None in the last 3 days, to Fri 7 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 San Bernardino, the next 46 hours

Visibility stays 10 miles or more through Sun 5 AM.

FriSatSun

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

What is measuring near here

The 6 instruments nearest San Bernardino, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.4 miles away.

measured now4 instruments

measured daily2 instruments

San Bernardino 2.5 NNWCA-SR-32

In a volunteer observer's own ground/2.8 mi away/1,409 ft/245 ft above here

precip, snowfall, snow depth

Rank-

RedlandsREDC1

At a cooperative observer's station/8.7 mi away/1,413 ft/249 ft above here

snowfall, snow depth, precip, high, low

Rank3,430of 4,465

Station report

The weather at San Bernardino, drawn

The nearest airport reporting now, 4.4 mi from San Bernardino, California. From its report of Oct 16, 2026, 7:55 AM local time: 3 of its 6 sheets.

The sky

Clear; visibility 10 mi or more.

Section of the sky over San Bernardino, height above the station to scale: a clear sky, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SBDFIG. A THE SKY OVER SAN BERNARDINOSECTION, 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 STATIONCLEARVISIBILITY, MILES: 10 MI OR MORE0510TITLESan Bernardino, the skySTATION REPORT · ASOS SBDTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-SBD-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

69.8 F with a dew point of 39.2 F, 33 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 6,900 ft up.

Chart of the air at San Bernardino: temperature 69.8 degrees Fahrenheit and dew point 39.2, 33 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 6,900 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SBDFIG. B THE AIR AT SAN BERNARDINOTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION02,0004,0006,0008,00020 F30 F40 F50 F60 F70 F80 FSATURATES 6,900 FT ABOVE THE STATION, AT 32.7 FTEMPERATURE 69.8 FDEW POINT 39.2 FSPREAD 30.6 FRELATIVE HUMIDITY 33 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 Bernardino, the airSTATION REPORT · ASOS SBDTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-SBD-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

Calm.

Plan of the wind at San Bernardino, 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 SBDFIG. C THE WIND AT SAN BERNARDINOPLAN, 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 Bernardino, the windSTATION REPORT · ASOS SBDTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-SBD-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of San Bernardino, 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 San Bernardino

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

Near San Bernardino

River and lake gauges