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Chehalis, Washington

City in Lewis County, Washington

Air quality

The air at Chehalis

Index 61, moderate, led by fine particles. Read at 12 AM from its reporting area, Chehalis (WA), 0 miles off.

61Moderate
  • Fine particles (PM2.5)61Moderate-

The days ahead

Good each day through Today, led by fine particles. Yesterday measured 23, good.

Smoke, the next 41 hours

Little smoke near the ground through Sat 5 PM: the index from smoke stays at 22 or under.

FriSat

Precipitation

What has fallen at Chehalis

None in the last 3 days, to Thu 11 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 Chehalis, the next 41 hours

Visibility stays 7 miles or more through Sat 5 PM, lowest 8 miles Sat 1 AM.

FriSat

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

What is measuring near here

The 6 instruments nearest Chehalis, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.4 miles away.

measured now4 instruments

measured daily2 instruments

Chehalis 0.6 SWA-LW-2

In a volunteer observer's own ground/0.4 mi away/185 ft/21 ft below here

precip, snowfall, snow depth

Rank-

DryadDYWW1

At a cooperative observer's station/14.3 mi away/315 ft/109 ft above here

snowfall, snow depth, precip, high, low

Rank1,110of 1,451

Station report

The weather at Citizen station FW8587, drawn

The nearest instrument reporting now, 2.6 mi from Chehalis, Washington. From its report of undefined: 3 of its 4 sheets.

The wind

Calm.

Plan of the wind at Citizen station FW8587, 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 FW8587FIG. C THE WIND AT CITIZEN STATION FW8587PLAN, 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 FORCE73TITLECitizen station FW8587, the windSTATION REPORT · CWOP FW8587TYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 1 of 4DATE2026-10-16IDSR-FW8587-1DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008

The column

At 474 ft above sea level, 2 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 29.41 inHg and the temperature at 57.3 F; the station's altimeter setting of 30.26 inHg means its barometer reads 29.75 inHg; it reports 49.0 F, 8.3 F colder than standard.

Section from sea level of where Citizen station FW8587 stands in the atmosphere, height to scale: the station 474 feet above sea level with 2 per cent of the air below it; the standard atmosphere's pressure there, 29.41 inches of mercury, and temperature, 57.3 degrees Fahrenheit; the altimeter setting of 30.26 and the station pressure it means, 29.75.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT FW8587FIG. D WHERE CITIZEN STATION FW8587 STANDS IN THE ATMOSPHERESECTION FROM SEA LEVEL, HEIGHT TO SCALE, THE STATION IN THE STANDARD ATMOSPHEREFT ABOVE SEA LEVEL05,00010,00015,000SEA LEVEL, 29.92 inHg IN THE STANDARD ATMOSPHERECITIZEN STATION FW85872 PER CENT OF THE AIR BELOW IT474 FT10 PER CENT OF THE AIR BELOW, 2,890 FT20 PER CENT OF THE AIR BELOW, 6,050 FT30 PER CENT OF THE AIR BELOW, 9,540 FT40 PER CENT OF THE AIR BELOW, 13,470 FTSTANDARD PRESSURE HERE29.41 inHgSTANDARD TEMPERATURE HERE57.3 FALTIMETER SETTING, REPORTED30.26 inHgITS BAROMETER READS29.75 inHgTEMPERATURE, REPORTED49.0 FTITLECitizen station FW8587, the columnSTATION REPORT · CWOP FW8587TYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 4DATE2026-10-16IDSR-FW8587-2DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

The sun

On Oct 16 the noon sun stands 34 degrees above the horizon at 46.64 N, and the day is 10 h 42 min long. Level ground there takes 56 per cent of the noon sunlight a surface facing the sun would.

Elevation of the noon sun at Citizen station FW8587, angles true: on Oct 16 it stands 34 degrees above the horizon, against 67 at the June solstice, 43 at the equinoxes and 20 at the December solstice; the day is 10 h 42 min long.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT FW8587FIG. E THE SUN AT CITIZEN STATION FW8587ELEVATION LOOKING WEST, SOUTH TO THE LEFT: THE NOON SUN ON THE DAY OF THE REPORT, AND AT THE SOLSTICES AND EQUINOXES; ANGLES TRUETHE STATIONJUNE SOLSTICE 67°EQUINOXES 43°DECEMBER SOLSTICE 20°OCT 16, 34°SOUTHANGLES TRUE; THE RAYS ARE OF ONE LENGTH AND DRAW DIRECTION ONLYDAY LENGTH 10 H 42 MINLEVEL GROUND TAKES 56 PER CENT OF THE NOON SUN A FACING SURFACE WOULDLATITUDE 46.64 N; THE SUN'S DECLINATION -9.1°TITLECitizen station FW8587, the sunSTATION REPORT · CWOP FW8587TYPEELEVATIONSCALEANGLES TRUEREVAS REPORTED SHEET 3 of 4DATE2026-10-16IDSR-FW8587-3DRAWN AS linework on paperSOURCES FB-ENG-007

The full report of Citizen station FW8587, in 4 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 Chehalis

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

Near Chehalis

River and lake gauges