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Eureka, California

City in Humboldt County, California

Air quality

The air at Eureka

Index 8, good, led by coarse particles. Read at 3 AM from its reporting area, Eureka (CA), 1 mile off.

8Good
  • Coarse particles (PM10)8Good1 mi

The days ahead

Yesterday measured 16, good.

Smoke, the next 44 hours

Little smoke near the ground through Sun 11 PM: the index from smoke stays at 6 or under.

SatSun

Precipitation

What has fallen at Eureka

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 Eureka, the next 44 hours

Dense fog: visibility falls to 0 miles Sat 6 AM, under a mile for 4 hours.

SatSun

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

What is measuring near here

The 5 instruments nearest Eureka, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.2 miles away.

measured now3 instruments

measured daily2 instruments

ScotiaSCTC1

At a cooperative observer's station/21.3 mi away/138 ft/48 ft above here

snowfall, snow depth, precip, high, low

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Station report

The weather at Arcata/Eureka Arpt, drawn

The nearest airport reporting now, 13.5 mi from Eureka, California. From its report of Oct 17, 2026, 3:53 AM local time: 3 of its 6 sheets.

The sky

Sky obscured at 200 ft; the ceiling is 200 ft; visibility 1/4 mi.

Section of the sky over Arcata/Eureka Arpt, height above the station to scale: sky obscured cloud with its base at 200 feet, the ceiling at 200 feet, and visibility of 1/4 mi.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT ACVFIG. A THE SKY OVER ARCATA/EUREKA ARPTSECTION, 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 SHEETVV 200 FTSKY OBSCURED, 8 EIGHTHS OF THE SKYCEILING 200 FTVISIBILITY, MILES: 1/4 MI0510TITLEArcata/Eureka Arpt, the skySTATION REPORT · ASOS ACVTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-17IDSR-ACV-1DRAWN AS linework on paperSOURCES FB-WAT-020, FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

47.0 F with a dew point of 47.0 F, 100 per cent relative humidity. The air is saturated at the ground; the lowest cloud reported is at 200 ft.

Chart of the air at Arcata/Eureka Arpt: temperature 47.0 degrees Fahrenheit and dew point 47.0, 100 per cent relative humidity; the air saturated at the ground, against the lowest cloud reported at 200 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT ACVFIG. B THE AIR AT ARCATA/EUREKA ARPTTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00040 F50 F60 FSATURATED AT THE GROUNDLOWEST CLOUD REPORTED, VV 200 FTTEMPERATURE AND DEW POINT 47.0 F, 47.0 FRELATIVE HUMIDITY 100 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 POINTTITLEArcata/Eureka Arpt, the airSTATION REPORT · ASOS ACVTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-17IDSR-ACV-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the east (90 degrees) at 3 mph: force 1, a light air on the Beaufort scale.

Plan of the wind at Arcata/Eureka Arpt, north up: blowing from 90 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 ACVFIG. C THE WIND AT ARCATA/EUREKA ARPTPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 90°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR1NOW, 3 MPH2LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEArcata/Eureka Arpt, the windSTATION REPORT · ASOS ACVTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-17IDSR-ACV-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Arcata/Eureka Arpt, 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 Eureka

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

Near Eureka

River and lake gauges