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Santa Rosa, California

City in Sonoma County, California

Air quality

The air at Santa Rosa

Index 40, good, led by fine particles. Read at 8 PM from its reporting area, Santa Rosa (CA), 1 mile off.

40Good
  • Fine particles (PM2.5)40Good-
  • Ozone31Good-

The days ahead

Good each day through Tue Oct 20, led by ozone. Yesterday measured 39, good.

Smoke, the next 46 hours

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

ThuFriSat

Precipitation

What has fallen at Santa Rosa

None in the last 3 days, to Thu 7 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 Santa Rosa, the next 46 hours

Visibility stays 10 miles or more through Sat 5 PM.

ThuFriSat

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

What is measuring near here

The 6 instruments nearest Santa Rosa, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.8 miles away.

measured now4 instruments

Bodega 6 WSW93245

At a climate reference station/20.9 mi away/63 ft/99 ft below here

temp, humidity, wind, solar, precip

Rank-

measured daily2 instruments

Santa Rosa 1.9 WCA-SN-26

In a volunteer observer's own ground/1.1 mi away/132 ft/30 ft below here

precip, snowfall, snow depth

Rank-

Santa RosaSTSC1

At a cooperative observer's station/1.2 mi away/207 ft/45 ft above here

snowfall, snow depth, precip, high, low

Rank118of 4,465

Station report

The weather at Santa Rosa, drawn

The nearest airport reporting now, 6.5 mi from Santa Rosa, California. From its report of Oct 15, 2026, 7:53 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 Santa Rosa, 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 STSFIG. A THE SKY OVER SANTA ROSASECTION, 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 MORE0510TITLESanta Rosa, the skySTATION REPORT · ASOS STSTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-STS-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

68.0 F with a dew point of 36.0 F, 31 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 7,200 ft up.

Chart of the air at Santa Rosa: temperature 68.0 degrees Fahrenheit and dew point 36.0, 31 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 7,200 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT STSFIG. B THE AIR AT SANTA ROSATHE 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 7,200 FT ABOVE THE STATION, AT 29.4 FTEMPERATURE 68.0 FDEW POINT 36.0 FSPREAD 32.0 FRELATIVE HUMIDITY 31 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 POINTTITLESanta Rosa, the airSTATION REPORT · ASOS STSTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-STS-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the south (180 degrees) at 3 mph: force 1, a light air on the Beaufort scale. The strongest gust today was 21 mph.

Plan of the wind at Santa Rosa, north up: blowing from 180 degrees, the south, 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 STSFIG. C THE WIND AT SANTA ROSAPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 180°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR1NOW, 3 MPH2LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLESanta Rosa, the windSTATION REPORT · ASOS STSTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-STS-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Santa Rosa, 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 Santa Rosa

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

Near Santa Rosa

River and lake gauges