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Colton, California

City in San Bernardino County, California

Air quality

The air at Colton

Index 38, good, led by ozone. Read at 3 AM from its reporting area, C San Bernardino (CA), 4 miles off.

38Good
  • Fine particles (PM2.5)8Good7.3 mi
  • Ozone38Good2 ppb3.7 mi
  • Coarse particles (PM10)34Good3.7 mi
  • Nitrogen dioxide24Good25.6 ppb3.7 mi
  • Sulfur dioxide0Good0.1 ppb7.3 mi
  • Carbon monoxide-0.1 ppm7.3 mi

The days ahead

Good each day through Today, led by ozone. Yesterday measured 44, good.

Smoke, the next 44 hours

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

SatSun

Precipitation

What has fallen at Colton

None in the last 3 days, to Sat 3 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 Colton, the next 44 hours

Visibility stays 10 miles or more through Sun 11 PM.

SatSun

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

What is measuring near here

The 6 instruments nearest Colton, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.3 miles away.

measured now4 instruments

measured daily2 instruments

Colton 1.9 NWCA-SR-57

In a volunteer observer's own ground/1.3 mi away/1,066 ft/72 ft above here

precip, snowfall, snow depth

Rank-

RedlandsREDC1

At a cooperative observer's station/8.5 mi away/1,413 ft/419 ft above here

snowfall, snow depth, precip, high, low

Rank3,402of 4,461

Station report

The weather at San Bernardino, drawn

The nearest airport reporting now, 5.3 mi from Colton, California. From its report of Oct 17, 2026, 4:00 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 San Bernardino, 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 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 STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETNO CLOUD DETECTED BELOW 12,000 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLESan Bernardino, the skySTATION REPORT · ASOS SBDTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-17IDSR-SBD-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

65.7 F with a dew point of 41.7 F, 42 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 5,500 ft up.

Chart of the air at San Bernardino: temperature 65.7 degrees Fahrenheit and dew point 41.7, 42 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 5,500 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 STATION01,0002,0003,0004,0005,0006,0007,00030 F40 F50 F60 F70 F80 FSATURATES 5,500 FT ABOVE THE STATION, AT 36.6 FTEMPERATURE 65.7 FDEW POINT 41.7 FSPREAD 24.0 FRELATIVE HUMIDITY 42 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 6DATE2026-10-17IDSR-SBD-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the east (80 degrees) at 3 mph: force 1, a light air on the Beaufort scale.

Plan of the wind at San Bernardino, north up: blowing from 80 degrees, the east, at 3 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 1, light air, 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 STATIONFROM 80°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR1NOW, 3 MPH2LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLESan Bernardino, the windSTATION REPORT · ASOS SBDTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-17IDSR-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 Colton

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

Near Colton

River and lake gauges