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Norco, California

City in Riverside County, California

Air quality

The air at Norco

Index 35, good, led by ozone. Read at 10 PM from its reporting area, Metro Riverside CO (CA), 10 miles off.

35Good
  • Fine particles (PM2.5)21Good6 mi
  • Ozone35Good39 ppb6 mi
  • Coarse particles (PM10)15Good6 mi
  • Nitrogen dioxide4Good4.6 ppb6 mi
  • Sulfur dioxide0Good0 ppb9.6 mi
  • Carbon monoxide-0.1 ppm9.6 mi

The days ahead

Highest 83, moderate, Fri Oct 16, led by fine particles. Yesterday measured 48, good.

Smoke, the next 43 hours

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

FriSat

Precipitation

What has fallen at Norco

None in the last 3 days, to Thu 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 Norco, the next 43 hours

Visibility stays 10 miles or more through Sat 5 PM.

FriSat

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

What is measuring near here

The 6 instruments nearest Norco, 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

CoronaAJO

At an airfield/3.3 mi away/533 ft/86 ft below here

temp, wind, gust, visibility, precip, pressure

Rank816of 4,465

measured daily2 instruments

Riverside Fire STN #3REVC1

At a cooperative observer's station/9.7 mi away/850 ft/231 ft above here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Corona, drawn

The nearest airport reporting now, 3.3 mi from Norco, California. From its report of Oct 15, 2026, 10:56 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 Corona, 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 AJOFIG. A THE SKY OVER CORONASECTION, 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 MORE0510TITLECorona, the skySTATION REPORT · ASOS AJOTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-AJO-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

74.0 F with a dew point of 41.0 F, 30 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 7,500 ft up.

Chart of the air at Corona: temperature 74.0 degrees Fahrenheit and dew point 41.0, 30 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 7,500 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT AJOFIG. B THE AIR AT CORONATHE 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 7,500 FT ABOVE THE STATION, AT 34.0 FTEMPERATURE 74.0 FDEW POINT 41.0 FSPREAD 33.0 FRELATIVE HUMIDITY 30 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 POINTTITLECorona, the airSTATION REPORT · ASOS AJOTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-AJO-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the east southeast (110 degrees) at 6 mph: force 2, a light breeze on the Beaufort scale. The strongest gust today was 37 mph.

Plan of the wind at Corona, north up: blowing from 110 degrees, the east southeast, at 6 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 AJOFIG. C THE WIND AT CORONAPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 110°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE4NOW, 6 MPH3GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLECorona, the windSTATION REPORT · ASOS AJOTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-AJO-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Corona, 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 Norco

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

Near Norco

River and lake gauges