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Rochester, Washington

Community in Thurston County, Washington

Air quality

The air at Rochester

Index 57, moderate, led by fine particles. Read at 2 AM from its reporting area, Chehalis (WA), 12 miles off.

57Moderate
  • Fine particles (PM2.5)57Moderate-
  • Ozone-1 ppb18.1 mi

The days ahead

Good each day through Today, led by fine particles. Yesterday measured 52, moderate.

Smoke, the next 46 hours

Little smoke near the ground through Sat 11 PM: the index from smoke stays at 28 or under.

FriSat

Precipitation

What has fallen at Rochester

None in the last 24 hours; 0.02 in over the last 3 days, to Fri 1 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.00in
Last 3 days
0.02in

Visibility

How far you can see at Rochester, the next 46 hours

Visibility stays 6 miles or more through Sat 11 PM, lowest 7 miles Sat 1 AM.

FriSat

On the radar over Rochester, WashingtonReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 6 instruments nearest Rochester, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.6 miles away.

measured now4 instruments

ChehalisCLS

At an airfield/11.0 mi away/177 ft/15 ft above here

temp, wind, gust, visibility, precip, pressure

Rank1,157of 1,451

measured daily2 instruments

DryadDYWW1

At a cooperative observer's station/15.9 mi away/315 ft/153 ft above here

snowfall, snow depth, precip, high, low

Rank1,110of 1,451

Station report

The weather at Chehalis, drawn

The nearest airport reporting now, 11.0 mi from Rochester, Washington. From its report of Oct 16, 2026, 2:35 AM local time: 3 of its 6 sheets.

The sky

Overcast at 400 ft; the ceiling is 400 ft; visibility 1/2 mi.

Section of the sky over Chehalis, height above the station to scale: overcast cloud with its base at 400 feet, the ceiling at 400 feet, and visibility of 1/2 mi.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT CLSFIG. A THE SKY OVER CHEHALISSECTION, 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 SHEETOVC 400 FTOVERCAST, 8 EIGHTHS OF THE SKYCEILING 400 FTVISIBILITY, MILES: 1/2 MI0510TITLEChehalis, the skySTATION REPORT · ASOS CLSTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-CLS-1DRAWN AS linework on paperSOURCES FB-WAT-020, FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

44.6 F with a dew point of 44.6 F, 100 per cent relative humidity. The air is saturated at the ground; the lowest cloud reported is at 400 ft.

Chart of the air at Chehalis: temperature 44.6 degrees Fahrenheit and dew point 44.6, 100 per cent relative humidity; the air saturated at the ground, against the lowest cloud reported at 400 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT CLSFIG. B THE AIR AT CHEHALISTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00030 F40 F50 F60 FSATURATED AT THE GROUNDLOWEST CLOUD REPORTED, OVC 400 FTTEMPERATURE AND DEW POINT 44.6 F, 44.6 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 POINTTITLEChehalis, the airSTATION REPORT · ASOS CLSTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-CLS-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

Calm.

Plan of the wind at Chehalis, north up: calm; beside it the Beaufort scale from calm to hurricane force, force 0, calm, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT CLSFIG. C THE WIND AT CHEHALISPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONCALMBEAUFORT FORCELEAST WIND, MPH0CALM0NOW, 0 MPH1LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEChehalis, the windSTATION REPORT · ASOS CLSTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-CLS-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Chehalis, in 6 sheets, each beside the Field Book plates that explain it

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Snow on the ground

Elsewhere in Washington

23 places, each with its own forecast and its own instruments.

Near Rochester

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

Near Rochester

River and lake gauges