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Roseville, California

City in Placer County, California

Air quality

The air at Roseville

Index 47, good, led by coarse particles. Read at 8 PM from its reporting area, Roseville-Rocklin (CA), 3 miles off.

47Good
  • Fine particles (PM2.5)38Good9.5 mi
  • Ozone30Good59 ppb9.5 mi
  • Coarse particles (PM10)47Good-
  • Nitrogen dioxide5Good5 ppb9.5 mi
  • Carbon monoxide-0.4 ppm15.6 mi

The days ahead

Highest 58, moderate, Fri Oct 16, led by ozone. Yesterday measured 39, good.

Smoke, the next 45 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 Roseville

None in the last 3 days, to Thu 8 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 Roseville, the next 45 hours

Visibility stays 10 miles or more through Sat 5 PM.

FriSat

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

What is measuring near here

The 6 instruments nearest Roseville, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.9 miles away.

measured now4 instruments

measured daily2 instruments

Sacramento 5ESESMTC1

At a cooperative observer's station/15.6 mi away/43 ft/100 ft below here

snowfall, snow depth, precip, high, low

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Station report

The weather at Sacramento McClellan, drawn

The nearest airport reporting now, 8.3 mi from Roseville, California. From its report of Oct 15, 2026, 9:15 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 Sacramento McClellan, 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 MCCFIG. A THE SKY OVER SACRAMENTO MCCLELLANSECTION, 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 MORE0510TITLESacramento McClellan, the skySTATION REPORT · ASOS MCCTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-MCC-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

69.8 F with a dew point of 41.0 F, 35 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 6,500 ft up.

Chart of the air at Sacramento McClellan: temperature 69.8 degrees Fahrenheit and dew point 41.0, 35 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 6,500 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MCCFIG. B THE AIR AT SACRAMENTO MCCLELLANTHE 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 6,500 FT ABOVE THE STATION, AT 34.9 FTEMPERATURE 69.8 FDEW POINT 41.0 FSPREAD 28.8 FRELATIVE HUMIDITY 35 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 POINTTITLESacramento McClellan, the airSTATION REPORT · ASOS MCCTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-MCC-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the southeast (140 degrees) at 3 mph: force 1, a light air on the Beaufort scale. The strongest gust today was 15 mph.

Plan of the wind at Sacramento McClellan, north up: blowing from 140 degrees, the southeast, 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 MCCFIG. C THE WIND AT SACRAMENTO MCCLELLANPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 140°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR1NOW, 3 MPH2LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLESacramento McClellan, the windSTATION REPORT · ASOS MCCTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-MCC-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Sacramento McClellan, 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 Roseville

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

Near Roseville

River and lake gauges